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  Subjects -> ENGINEERING (Total: 2488 journals)
    - CHEMICAL ENGINEERING (209 journals)
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    - ELECTRICAL ENGINEERING (119 journals)
    - ENGINEERING (1301 journals)
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ENGINEERING (1301 journals)                  1 2 3 4 5 6 7 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 8)
3D Research     Hybrid Journal   (Followers: 21)
AAPG Bulletin     Hybrid Journal   (Followers: 8)
AASRI Procedia     Open Access   (Followers: 15)
Abstract and Applied Analysis     Open Access   (Followers: 3)
Aceh International Journal of Science and Technology     Open Access   (Followers: 5)
ACS Nano     Hybrid Journal   (Followers: 304)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 7)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 3)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access  
Active and Passive Electronic Components     Open Access   (Followers: 7)
Adaptive Behavior     Hybrid Journal   (Followers: 10)
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi     Open Access  
Adsorption     Hybrid Journal   (Followers: 4)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 9)
Advanced Journal of Graduate Research     Open Access  
Advanced Nonlinear Studies     Hybrid Journal  
Advanced Science     Open Access   (Followers: 6)
Advanced Science Focus     Free   (Followers: 5)
Advanced Science Letters     Full-text available via subscription   (Followers: 11)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 7)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 17)
Advances in Calculus of Variations     Hybrid Journal   (Followers: 4)
Advances in Catalysis     Full-text available via subscription   (Followers: 5)
Advances in Complex Systems     Hybrid Journal   (Followers: 8)
Advances in Engineering Software     Hybrid Journal   (Followers: 28)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 16)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 14)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 23)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 22)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 8)
Advances in Natural Sciences: Nanoscience and Nanotechnology     Open Access   (Followers: 29)
Advances in Nonlinear Analysis     Hybrid Journal  
Advances in Operations Research     Open Access   (Followers: 12)
Advances in OptoElectronics     Open Access   (Followers: 6)
Advances in Physics Theories and Applications     Open Access   (Followers: 16)
Advances in Polymer Science     Hybrid Journal   (Followers: 45)
Advances in Porous Media     Full-text available via subscription   (Followers: 5)
Advances in Remote Sensing     Open Access   (Followers: 50)
Advances in Science and Research (ASR)     Open Access   (Followers: 6)
Aerobiologia     Hybrid Journal   (Followers: 3)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 6)
AIChE Journal     Hybrid Journal   (Followers: 35)
Ain Shams Engineering Journal     Open Access   (Followers: 5)
Akademik Platform Mühendislik ve Fen Bilimleri Dergisi     Open Access   (Followers: 1)
Al-Nahrain Journal for Engineering Sciences     Open Access  
Alexandria Engineering Journal     Open Access   (Followers: 1)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 27)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 10)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 25)
Annals of Combinatorics     Hybrid Journal   (Followers: 4)
Annals of Pure and Applied Logic     Open Access   (Followers: 3)
Annals of Regional Science     Hybrid Journal   (Followers: 8)
Annals of Science     Hybrid Journal   (Followers: 7)
Antarctic Science     Hybrid Journal   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 2)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 6)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 20)
Applied Clay Science     Hybrid Journal   (Followers: 6)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 13)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 8)
Applied Network Science     Open Access   (Followers: 3)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 5)
Applied Physics Research     Open Access   (Followers: 6)
Applied Sciences     Open Access   (Followers: 3)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 6)
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 5)
Archives of Foundry Engineering     Open Access  
Archives of Thermodynamics     Open Access   (Followers: 9)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ASEE Prism     Full-text available via subscription   (Followers: 3)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 1)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 9)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 8)
Assembly Automation     Hybrid Journal   (Followers: 2)
at - Automatisierungstechnik     Hybrid Journal   (Followers: 1)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Automotive Experiences     Open Access  
Autonomous Mental Development, IEEE Transactions on     Hybrid Journal   (Followers: 8)
Avances en Ciencias e Ingeniería     Open Access  
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 1)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 5)
Batteries     Open Access   (Followers: 6)
Bautechnik     Hybrid Journal   (Followers: 1)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 28)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 4)
BER : Manufacturing Survey : Full Survey     Full-text available via subscription   (Followers: 1)
BER : Motor Trade Survey     Full-text available via subscription  
BER : Retail Sector Survey     Full-text available via subscription   (Followers: 1)
BER : Retail Survey : Full Survey     Full-text available via subscription   (Followers: 1)
BER : Survey of Business Conditions in Manufacturing : An Executive Summary     Full-text available via subscription   (Followers: 3)
BER : Survey of Business Conditions in Retail : An Executive Summary     Full-text available via subscription   (Followers: 3)
Beyond : Undergraduate Research Journal     Open Access  
Bhakti Persada : Jurnal Aplikasi IPTEKS     Open Access  
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Bilge International Journal of Science and Technology Research     Open Access  
Biofuels Engineering     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 11)
Biomedical Engineering     Hybrid Journal   (Followers: 16)
Biomedical Engineering     Hybrid Journal   (Followers: 2)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering, IEEE Reviews in     Full-text available via subscription   (Followers: 20)
Biomedical Engineering, IEEE Transactions on     Hybrid Journal   (Followers: 35)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 4)
Biomicrofluidics     Open Access   (Followers: 5)
BioNanoMaterials     Open Access   (Followers: 2)
Biotechnology Progress     Hybrid Journal   (Followers: 41)
Bitlis Eren University Journal of Science and Technology     Open Access  
Boletin Cientifico Tecnico INIMET     Open Access  
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Broadcasting, IEEE Transactions on     Hybrid Journal   (Followers: 12)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 13)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 14)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers Droit, Sciences & Technologies     Open Access  
Calphad     Hybrid Journal   (Followers: 2)
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 31)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 43)
Carbon Resources Conversion     Open Access   (Followers: 1)
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 6)
Case Studies in Thermal Engineering     Open Access   (Followers: 6)
Catalysis Communications     Hybrid Journal   (Followers: 6)
Catalysis Letters     Hybrid Journal   (Followers: 2)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 7)
Catalysis Science and Technology     Free   (Followers: 8)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 3)
Catalysis Today     Hybrid Journal   (Followers: 7)
CEAS Space Journal     Hybrid Journal   (Followers: 2)
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 3)
Central European Journal of Engineering     Hybrid Journal  
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 3)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 2)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 3)
CienciaUAT     Open Access   (Followers: 1)
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Full-text available via subscription   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Full-text available via subscription   (Followers: 13)
City, Culture and Society     Hybrid Journal   (Followers: 22)
Clean Air Journal     Full-text available via subscription   (Followers: 1)
Clinical Science     Hybrid Journal   (Followers: 9)
Coal Science and Technology     Full-text available via subscription   (Followers: 3)
Coastal Engineering     Hybrid Journal   (Followers: 11)
Coastal Engineering Journal     Hybrid Journal   (Followers: 6)
Coatings     Open Access   (Followers: 4)
Cogent Engineering     Open Access   (Followers: 3)
Cognitive Computation     Hybrid Journal   (Followers: 4)
Color Research & Application     Hybrid Journal   (Followers: 3)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 14)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 15)
Communications Engineer     Hybrid Journal   (Followers: 1)
Communications in Information Science and Management Engineering     Open Access   (Followers: 4)
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 28)
Composite Interfaces     Hybrid Journal   (Followers: 7)
Composite Structures     Hybrid Journal   (Followers: 292)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 224)
Composites Part B : Engineering     Hybrid Journal   (Followers: 268)
Composites Science and Technology     Hybrid Journal   (Followers: 199)
Comptes Rendus Mécanique     Full-text available via subscription   (Followers: 2)
Computation     Open Access   (Followers: 1)
Computational Geosciences     Hybrid Journal   (Followers: 17)
Computational Optimization and Applications     Hybrid Journal   (Followers: 8)
Computational Science and Discovery     Full-text available via subscription   (Followers: 2)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 8)
Computer Science and Engineering     Open Access   (Followers: 20)
Computers & Geosciences     Hybrid Journal   (Followers: 31)
Computers & Mathematics with Applications     Full-text available via subscription   (Followers: 9)
Computers and Electronics in Agriculture     Hybrid Journal   (Followers: 5)
Computers and Geotechnics     Hybrid Journal   (Followers: 12)
Computing and Visualization in Science     Hybrid Journal   (Followers: 7)

        1 2 3 4 5 6 7 | Last

Journal Cover
Bulletin of Engineering Geology and the Environment
Journal Prestige (SJR): 0.896
Citation Impact (citeScore): 2
Number of Followers: 14  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1435-9537 - ISSN (Online) 1435-9529
Published by Springer-Verlag Homepage  [2352 journals]
  • An approach on modelling of in-situ deformations for unstable coal mine
           slopes
    • Abstract: Twelve unstable slopes have been observed in four different coal mines of the General Directorate of Turkey Coal Enterprises (TKİ) for the last 12 years. A total of 131 theodolite, inclinometer and extensometer stations have been established for monitoring unstable slopes. According to the measurement results, the magnitude of the deformation values in all of the stations ranges from 0 to 10,978 mm. The database shows that time dependent deformation is formed in three consecutive stages. The form of the first stage is logarithmic, the second stage is linear and the third stage is exponential. To ensure control of the unstable slope, precautions must be taken during the second stage, or the beginning of the third stage at the latest according to observations, measurements and previous experience. To express time dependent deformation behaviour for unstable slopes, a graphical presentation of the mathematical model was developed. By means of statistical analysis of the database, a mathematical model was prepared. The model is characterized by three stages of deformation behaviour. In addition, the model can be presented in sub-deformation curves for each stage. The sum of the sub-deformation curves are equal to the predicted deformation curve. However, in this study, it is named as the predicted total deformation. Velocity and acceleration behaviours were determined by taking first and second derivatives of the time dependent predicted total deformation curve. Therefore, all stages of the deformation can be determined. In addition, a classification based on deformation behaviour for unstable slopes was suggested.
      PubDate: 2018-07-18
      DOI: 10.1007/s10064-018-1344-0
       
  • Engineering geology of cinder gravel in Ethiopia: prospecting, testing and
           application to low-volume roads
    • Authors: Gareth James Hearn; Andrew Otto; Percival Anthony Kerton Greening; Alemayehu Ayele Endale; Deribachew Mezgebu Etefa
      Abstract: Expansion of the rural road network in Ethiopia requires the availability of low-cost materials for road construction, including capping layer and subgrade improvement, sub-base, base course, gravel wearing course and bituminised surface treatment. A reluctance to use cinder gravels for these purposes in the past has stemmed from the view that their properties, in terms of grading and CBR strength, are marginal and highly variable when compared to international specifications for road works. The geographical variability in Ethiopian cinder gravel geochemistry and engineering properties is described and comparisons are made with engineering geological field descriptions and cinder cone morphology, leading to the conclusion that maars and steep-sided, well-defined cones tend to yield the better-quality materials. The performance of trial sections of road constructed using cinder gravel is assessed and combined with the results of laboratory testing to develop a guideline for the wider use of the material in roadworks, either directly or through processes of blending, alternative compaction methods and cement stabilisation to yield a product that can be considered “fit for purpose” for a range of uses in low-volume road construction.
      PubDate: 2018-07-16
      DOI: 10.1007/s10064-018-1333-3
       
  • The dry closure of the Almagrera tailings dam: detailed modelling,
           monitoring results and environmental aspects
    • Authors: José L. Justo; Antonio Morales-Esteban; Enrique Justo; Francisco A. Jiménez-Cantizano; Percy Durand; Manuel Vázquez-Boza
      Abstract: The Aznalcóllar tailings dam failure moved the Spanish authorities to pay attention to tailings deposits. The Almagrera tailings dam holds one of the largest mining waste deposits in Andalucía. The dry closure of this dam has been detailed in this manuscript. Some serious difficulties had to be solved. Firstly, the dam had undergone up to five raisings before the closure operations started, and this process had not been properly documented. Secondly, the reservoir water was contaminated by the toxic tailings placed several metres below and, due to the high acidity of this water, the geotechnical characterization of the tailings deposit has been really challenging. Thirdly, the definition of the model itself has been a complex task due to the consideration of many phases and different hypotheses. In the finite element calculation, a constitutive model of perfect non-associated plasticity has been used for the dam and a soft soil creep model for the tailings. Next, it has been decided to decontaminate a closed mine by placing its abandoned material—Las Viñas fill—on top of the tailings deposit inside the reservoir. This operation generated important settlements on the tailings deposit. These settlements had to be accelerated by placing drainage wells to avoid the cracking of the final cap. The safety factor during the dry closure operations under dynamic loading was insufficient and a compacted rockfill reinforcement had to be laid on the downstream slope of the dam. Very few papers describe a successful dry closure of a tailings dam as is done here.
      PubDate: 2018-07-13
      DOI: 10.1007/s10064-018-1342-2
       
  • Co-seismic surface rupture of Papatea fault and reactivation mechanism of
           the Clarence landslide during the 2016 M w 7.8 Kaikoura earthquake, New
           Zealand
    • Authors: Peng Guo; Zhu-jun Han; Hong-liu Ran; Jia-hong Luo; Guo Wu; Ren-mao Yuan
      Abstract: Large earthquake-triggered landslides near a seismogenic fault are usually closely linked to fault slipping. Therefore, it is important to research the relationship between the landslide movement and the deformation pattern of faults to better understand the location and influencing factors related to the large landslides. A large landslide, on the right bank of the Clarence River, New Zealand, was reactivated during the 2016 Mw 7.8 Kaikoura earthquake. The landslide is located in close proximity to the Papatea Fault which ruptured during the earthquake. The special tectonic location of this landslide provided favorable conditions to research the failure mechanism of earthquake-triggered landslides. Field investigation and remote-sensing images revealed that the co-seismic surface rupture zone of the Papatea Fault is relatively complicated and characterized by a wide deformation zone with a width of ~80–170 m. The northern section showed as left-lateral strike-slip and thrust-slip, with a vertical displacement of up to 4–6 m. However, it exhibited thrust motion in the Clarence landslide area. The Clarence landslide was a reactivation of a pre-existing landslide. The thrust faulting of the Papatea Fault produced a wide deformation and fractured zone near the top of the landslide mass, and resulted in over-steepened topography in the landslide area. It should be noted that long-team seismic shaking, especially the main frequency of the seismic acceleration and rapid co-seismic vertical slip of the fault, played the principal role in further accelerating topographic instability during the earthquake. The landslide body thus started to slide along a pre-existing sliding surface under these actions. Our results indicate that the deformation pattern of the seismogenic fault could also play an important role in the occurrence of earthquake-triggered landslides, in addition to geological and geomorphological conditions and local seismic acceleration.
      PubDate: 2018-07-12
      DOI: 10.1007/s10064-018-1338-y
       
  • Effect of initiation location on distribution and utilization of explosion
           energy during rock blasting
    • Authors: Qidong Gao; Wenbo Lu; Peng Yan; Haoran Hu; Zhaowei Yang; Ming Chen
      Abstract: In mining, the explosive filled in each borehole is usually initiated by the detonator. However, the effect of the location of the detonator (i.e. initiation location), which determines the propagation direction of the detonation wave, cannot be ignored. In this study, the influence mechanism of initiation location was analyzed with the help of numerical simulation. Two blasting experiments were also conducted to study the effect of initiation location. The results indicate that the initiation location plays an important role in the distribution of the explosion energy transmitted to the surrounding rock mass. For the vertical borehole blasting, the peak particle velocity below the borehole can be reduced by 21.0–59.0% under bottom initiation, when compared to top initiation. The blast-induced damage of the remaining rock mass below the borehole is also weaker by 5.0–8.9% under bottom initiation. However, the problem of under break might become serious if the detonator is moved downwards in foundation excavation. The explosion energy is preferentially transmitted to the same orientation of the detonation wave during rock blasting. The bottom initiation, recommended by most previous researchers, is not always the best choice. The location of the detonator should be changed according to the onsite situations.
      PubDate: 2018-07-10
      DOI: 10.1007/s10064-018-1296-4
       
  • Deformation failure characteristics of coal–rock combined body under
           uniaxial compression: experimental and numerical investigations
    • Authors: Yulong Chen; Jianping Zuo; Dejun Liu; Zhenbo Wang
      Abstract: The deformation and failure behaviour of coal–rock combined body under uniaxial compression were investigated experimentally and numerically. The mechanical parameters, including the uniaxial compressive strength (UCS), elastic modulus and full-scale stress–strain curves, were obtained. A detailed analysis of the evolution of the internal cracks based on X-ray computed tomography (CT) observations and acoustic emission (AE) locations is presented. The experimental results show that the mechanical properties and deformation failure characteristics of the coal–rock combined body were governed mainly by the coal. The UCS and elastic modulus of the coal–rock combined body were slightly larger than those of the coal and most of the cracks occurring in the coal were a result of the uniaxial compression. Furthermore, a numerical simulation was conducted to validate the experimental evidence. Finally, based on this understanding, a constitutive relationship was proposed using the natural strain described in Hooke’s law for accurate modelling of the deformation of the coal–rock body. A good agreement was obtained between the numerical results and experimental data during the pre-peak regime.
      PubDate: 2018-07-10
      DOI: 10.1007/s10064-018-1336-0
       
  • Analysis of Schmidt hammer rebound test results with repetitive impacts
           for determining the mechanical characteristics of weathered pyroclastic
           rock surfaces: a case study along the Isotake coast, Japan
    • Authors: Tetsuya Kogure
      Abstract: Cliffs located along the Isotake coast, Shimane, Japan, are characterized by the development of indents without rockfalls and by the occurrence of rockfalls without indents—even though these cliffs have the same geology. An analytical method was developed to determine the mechanical properties of the rock surfaces of a coastal cliff. Twenty continuous impact repetitions of a Schmidt hammer were applied normal to the cliff surfaces in each test. The results of the tests (26 with indents and 22 without indents) showed a gradual increase in the rebound value with increasing number of repetitions. A new exponential equation was proposed in this study to describe the features of the weathered surfaces. The changes in the results were well approximated by this equation, and the approximation clearly distinguished between the two types of weathered surfaces, with higher rebound values at the surfaces of the cliffs with indents than at the surface of cliffs without indents. The homogeneity and heterogeneity of the surface and inner body of the cliff rock can also be modelled by the coefficients in this equation.
      PubDate: 2018-07-09
      DOI: 10.1007/s10064-018-1334-2
       
  • Assessing the risk degree of goafs by employing hybrid TODIM method under
           uncertainty
    • Authors: Weizhang Liang; Guoyan Zhao; Hao Wu; Ying Chen
      Abstract: A large number of accidents caused by goafs have great influence on the ecological environment and public safety. In order to assess the risk degrees of goafs, a hybrid Tomada de Decisão Interativa Multicritério (TODIM) method is proposed in this paper. Firstly, on account of the geological conditions, shape parameters and environmental factors, an evaluation index system is established. This system includes seven quantitative sub-criteria and six qualitative sub-criteria. The combined weight of each index is determined on the basis of game theory by combining the subjective weight and objective weight. Afterward, a fuzzy-TODIM method is put forward to obtain the rank of risk degree and the specific risk level. Finally, the hybrid TODIM method is used to assess the risk degrees of goafs in Shuikoushan lead-zinc mine under uncertainty. Sensitivity analysis is demonstrated to reveal the robustness of this approach. Results show that the proposed hybrid TODIM method can be adopted to assess the risk degrees of goafs reliably and stably.
      PubDate: 2018-07-07
      DOI: 10.1007/s10064-018-1340-4
       
  • Integrated approach for determining spatio-temporal variations in the
           hydrodynamic factors as a contributing parameter in landslide
           susceptibility assessments
    • Authors: Mustafa Can Canoglu; Hüsnü Aksoy; Murat Ercanoglu
      Abstract: Although general approaches to the effect of water on the mechanisms causing landslides have been adopted, the work presented in this paper was carried out to quantify the landslide susceptibility variation in space and time, integrating the soil moisture distribution and routing (SMDR) model and landslide susceptibility concept. The approach proposed in the present study reflects the temporal effects of the saturation degree index (SDI) on landslide susceptibility as a new index to understand the effect of soil saturation. The topographic wetness index (TWI) is a conventional parameter that represents the relative wetness on landsliding. The new proposed landslide susceptibility approach is used in the study area to understand the effect of soil saturation and the emergence of the Derebaşı landslide in the study area. The comparative results of landslide susceptibility maps obtained from the new approach utilizing the proposed SDI and conventional TWI are remarkable. Accordingly, a new substantial method is proposed using the attainable monthly mean meteorological data to generate monthly landslide susceptibility maps. The results obtained for the Derebaşı landslide using the proposed method are validated with the other landslide that has occurred in the same watershed. The results revealed that the approach proposed in this study was compatible with the landslide mechanism in the study area and may help to express the water effect in landslide susceptibility analyses.
      PubDate: 2018-07-06
      DOI: 10.1007/s10064-018-1337-z
       
  • Auscultation géologique, géophysique et géotechnique du site du barrage
           de Tabellout, Nord-Est Algérien
    • Authors: Mustapha Tekkouk; Riad Benzaid; Juan Martinez
      Abstract: Nowadays geophysical methods (electrical prospecting, seismic surveys, geological radar, tomography) are often used in studies of landslides, instabilities and rockfall rock slides. The combined use of some of these methods makes it possible in the majority of cases to provide answers to the problems encountered on site and to solve them. Indeed, the site of the dam of Tabellout located in Jijel (Northeast Algeria) very tectonized has experienced massive mass movements. Through the present work, we will highlight the advantage of the combination of the results obtained by the geological study, core drilling and the seismic refraction carried out at the site of the dam. Thus, a global qualitative approach to the physical state and the fracturing of formations likely to generate new movements or mass slides during future hydric or seismic stresses is proposed.
      PubDate: 2018-07-05
      DOI: 10.1007/s10064-018-1320-8
       
  • The characterization of rock slope stability using key blocks within the
           framework of GeoSMA-3D
    • Authors: Feili Wang; Shuhong Wang; Muhammad Zaffar Hashmi; Zhanguo Xiu
      Abstract: Considering the uncertainty and complexity of the influencing factors, the present study focused on the multi-level and multi-index evaluation system for analyzing rock slope stability. Quantitative analysis of the influence degree of the evaluation index on the rock slope stability was carried out by extension theory. The most significant factors affecting rock slope stability and the corresponding evaluation index were obtained. Further, the study presents a concept about the instability characterization coefficient of the key block, which is an important factor controlling slope stability. With this coefficient implemented into the search module of key blocks in the program Geotechnical Structure and Model Analysis-3D (GeoSMA-3D), developed by the corresponding author’s team, a further determination and visualization of key blocks were achieved. However, in many previous studies, there was no good correlation between the theoretical key blocks and the actual rock slope engineering, which led to derailment between theoretical analysis and practical engineering. Hence, this paper proposed the characterization safety factor of rock slope stability that combined the instability characterization coefficient with the weight of key blocks. The influence degree of each key block on rock slope stability was determined by the size of the instability characterization coefficient of key blocks. The weight of each key block on the slope stability was determined by combining this coefficient with the analytic hierarchy process (AHP). The key block information was applied to characterize the rock slope stability. The present study proposed a convenient and feasible evaluation method regarding rock slope stability. For the specific rock slope engineering, the significance of each evaluation index was determined and the most significant index was obtained. The determination and visualization of key blocks and the judgment of the slope stability were investigated, which verified the applicability and feasibility of this evaluation method.
      PubDate: 2018-07-04
      DOI: 10.1007/s10064-018-1291-9
       
  • Dynamic analysis of a long-runout, flow-like landslide at Areletuobie,
           Yili River valley, northwestern China
    • Authors: Wenpei Wang; Yueping Yin; Sainan Zhu; Yunjie Wei; Nan Zhang; Jinkai Yan
      Abstract: In the analysis reported here, the catastrophic landslide at Areletuobie town in Xinyuan county is used as an example to investigate the formation mechanism and dynamics of a flow-like landslide in Yili River valley. At 0:30 a.m. on July 31, 2012, a catastrophic landslide occurred in Xinyuan, Xinjiang, northwestern China, resulting in the deaths of 28 people when the temporary sheds in the downstream adit mining area were destroyed and buried directly in the path of the landslide. The runout distance of the landslide was about 1800 m, and the accumulative volume was about 600,000 m3. The landslide can be categorized into three regions: the sliding source, impact-shoveling, and flow-accumulative regions. The stability of the landfill slope in the sliding source region was analyzed at two seepage stages of a long period of rain and a sudden heavy rainfall. To improve the accuracy of further hazard assessments of similar types of potential landslides in the same area, we simulated the kinematic and dynamic processes of the impact-shoveling region and the debris flow using the numerical model DAN-W and a combination of the frictional model and Voellmy model. The landslide moved for approximately 139 s downward along the valley, with a maximum velocity of 30 m s−1. This is a typical long-runout flow-like landslide. Finally, we conclude that the identification of the potential geological hazards at Yili River valley area is crucial to prevent any catastrophic flow-like landslide triggered by heavy rainfall. The identified indicators should be properly used as a scientific basis for classifying hazard areas of flow-like landslides as well as for monitoring and early recognition.
      PubDate: 2018-07-03
      DOI: 10.1007/s10064-018-1322-6
       
  • Modified Q-index for prediction of rock mass quality around a tunnel
           excavated with a tunnel boring machine (TBM)
    • Authors: Feng Ji; Yuchuan Shi; Renjie Li; Chunhong Zhou; Ning Zhang; Jishun Gao
      Abstract: Rock mass quality is closely related to tunnel stability and supporting measures. The Q-system, based on the drilling and blasting method, is one of the most important methods for rock mass classification systems and provides reliable long-term protection for tunnel excavation and reinforcement. However, in comparison to the drilling and blasting method, tunnels excavated using the tunnel boring machine (TBM) method have smooth and integral walls. The number of structural planes in these tunnels, their extension lengths, opening widths, and other characteristics are significantly different from those excavated using the drilling and blasting method. These differences lead to prediction errors in rock mass quality when the Q-system is applied to tunnels excavated by a TBM, and the coincidence rate is less than 70%. In this study, a reduction factor RKv, based on the wave velocity test, is used to replace the RQD/Jn term in the Q-system to reflect the integrity of the rock mass. This replacement can overcome the shortcomings that result from the smooth walls in TBM tunnels by applying the wave velocity during tunnel construction. Based on multiple regression analysis of RKv, we established a QT method for rock classification of material surrounding TBM tunnels. This new method provides a prediction coincidence rate of more than 85%.
      PubDate: 2018-06-29
      DOI: 10.1007/s10064-018-1257-y
       
  • Physical modeling of the controlled shaft deformation law during the solid
           backfill mining of ultra-close coal seams
    • Authors: Hao Yan; Jixiong Zhang; Sheng Zhang; Nan Zhou
      Abstract: Solid backfill mining has gradually become the key technology to control shaft deformation during industrial square coal pillar recovery. The industrial square area of the Nantun coal mine was studied in this paper. Based on similarity criteria of the physical modeling, an experimental model was designed to study the shaft deformation law under caving mining and backfill mining. A non-contact full-field strain measurement system and a resistance strain gauge were adopted to monitor the model. The mining-induced deformations, failures and stress distributions of shaft-surrounding rock masses during the recovery of industrial square coal pillars by caving mining and backfill mining were explicitly compared and analyzed. The results showed that the deformation and failure of shafts was caused by strata movements during the mining of the coal seams. Different lithology, stiffnesses, and thicknesses of adjacent rock strata result in asynchronous stratum movements, which thus cause shaft failure. The key to controlling mining-induced deformation of shafts during solid backfill mining is to control strata movement as follows: solid backfilling → control of the strata movement → control of the shaft deformation → decrease of the tension and shear force experienced by the shaft → decrease of shaft damage. Finally, the design method of the backfill body’s compression ratio based on shaft deformation control during the solid backfill mining process is proposed, thus laying the foundation for the safe recovery of an unexploited coal industrial square in resource-exhausted coal mines.
      PubDate: 2018-06-26
      DOI: 10.1007/s10064-018-1335-1
       
  • Development characteristics and formation analysis of Baixiang earth
           fissure on North China plain
    • Authors: Jishan Xu; Jianbing Peng; Yahong Deng; Feiyong Wang
      Abstract: The Baixiang earth fissure is a typical earth fissure developed on the North China Plain, about 12 km in length, with NE40° trending, distinct linear emergence, and in good agreement with the South Baixiang fault. Its formation was the result of internal tectonic factors and external dynamic factors. The trenching and drilling data show that the strata in the earth fissure development zone have a striking “two-element” structure: the upper thick silty clay formation and the lower thick sand formation, providing the necessary space for the development of an earth fissure. The seismic exploration data show that the width of the developed earth fissure zone is determined by the fault structure buried at a certain depth under the strata and the horizontal stretching of the overburden. Constrained by such geological structure and stratal properties, a series of small “tensile cracks” are developed at different depths in the development zone. They are further affected by phenomena, such as formation compression and collapse, which are caused by groundwater seepage and sediment laden water migration in the lower sand formation under the influences of external factors (such as groundwater withdrawal and man-made concentrated irrigation). These cracks hence cut through to the earth surface and a cascade of cracks in a certain direction form linear surface fissures. This study importantly reveals the correlation mechanism between the various factors of earth fissures and the transformation mechanism of regional tectonic movements from deep to surface.
      PubDate: 2018-06-25
      DOI: 10.1007/s10064-018-1324-4
       
  • Predicting the Young’s Modulus of granites using the Bayesian model
           selection approach
    • Authors: Lingqiang Yang; Xianda Feng; Yang Sun
      Abstract: The value of Young’s modulus (E) is critical to the design of geotechnical engineering projects. Although E can be directly measured by laboratory tests, high-quality core samples and expensive sophisticated instruments are required. Therefore, a method for the indirect estimation of E is an appealing possibility. This study develops a model for predicting the E of intact granite based on the Bayesian model class selection approach. An experimental database of granite rock properties that includes the value E, point load strength index (Is50), L-type Schmidt hammer rebound number (R L ), P-wave velocity (V p ), porosity (η), and uniaxial compressive strength, is applied to develop the most suitable model. The proposed model is then compared to existing approaches. The results indicate that the proposed models provide satisfactory predictions and good practicality in application.
      PubDate: 2018-06-23
      DOI: 10.1007/s10064-018-1326-2
       
  • Geology and topography based V s 30 map for Sylhet City of Bangladesh
    • Authors: Md. Zillur Rahman; Sumi Siddiqua; A. S. M. Maksud Kamal
      Abstract: Time-averaged shear wave velocity of the soil layers to a depth of 30 m (Vs30) is primarily estimated by different geophysical and geotechnical site investigation techniques, such as downhole and crosshole seismics (DS and CS), spectral analysis of surface waves (SASW), multichannel analysis of surface waves (MASW), and the standard penetration test (SPT). Sufficiently dense field measurements of the Vs30 using these techniques are not feasible for VS30 mapping at a regional scale. Therefore, secondary information, such as geological and topographical constrains are used as proxies to predict the Vs30 for mapping purposes. In the present study, a Vs30 map for Sylhet City has been prepared based on the geological and topographical constrains. The map has five Vs30 units having a distinct mean Vs30 value for each unit. This Vs30 map can be used as an effective proxy to estimate site response of the soil layers in Sylhet City.
      PubDate: 2018-06-23
      DOI: 10.1007/s10064-018-1331-5
       
  • Probabilistic evaluation of drilling rate index based on a least square
           support vector machine and Monte Carlo simulation
    • Authors: Zhongliang Ru; Hongbo Zhao; Changxing Zhu
      Abstract: Drilling rate index (DRI) is an important index for evaluating the drillability of rock in mining, tunneling, and underground excavation. Various studies have been implemented to predict DRI based on the relationship between DRI and its influence factors. Meanwhile, many uncertainties are associated with the evaluation of DRI because of the complexity and nonlinearity of rock mechanical and physical properties. But the uncertainty has not been considered in previous studies. In this study, a novel method was proposed to evaluate DRI considering the uncertainty through combining the least square support vector machine (LSSVM) and Monte Carlo simulation (MCS). The LSSVM was adopted to map the relationship between DRI and rock strength index. Latin hypercube sampling (LHS) was used to produce the sample sets based on the uncertainty distribution of rock strength index. MCS was utilized to simulate the uncertainty of DRI. The proposed method was verified by three testing examples with the uncertainties. Interaction effects of DRI’s influence factors were analyzed and discussed. The results show the proposed method can evaluate the DRI reasonably. Compared with the determinate method, the proposed method is more rational and scientific and conforms to the rock engineering practice. Interaction effects should be considered while predicting or evaluating the DRI. LSSVM can not only present well the nonlinear relationship between DRI and its influence factors, but also deal with the interaction effects of the DRI’s influence factors. The proposed method provides a scientific tool to predict and evaluate the DRI and its uncertainty.
      PubDate: 2018-06-22
      DOI: 10.1007/s10064-018-1327-1
       
  • Predicting the probability of rockfalls occurrence caused by the
           earthquake of Changureh-Avaj in 2002 using LR, MLP, and RBF methods
    • Authors: V. Bagheri; A. Uromeihy; S. M. Fatemi Aghda
      Abstract: Rockfalls pose serious threats to human beings, structures, and lifelines. In the present research, a model was developed to predict the possibility of seismic rockfalls on a regional scale. For this purpose, three models including logistic regression (LR), a multilayer perceptron artificial neural network (MLP), and a radial basis function artificial neural network (RBF) were employed. Bivariate logistic regression is a multivariable statistical method that provides a mathematical model using independent variables to predict the occurrence probability of a given phenomenon at a certain location. Although artificial networks of RBF and MLP are pretty similar, there are some structural differences in the components between these two neural networks. The earthquake of Changureh-Avaj in 2002 was used as a basis and benchmark for the model presented in this work. The sustainable zones predicted by LR, MLP, and RBF methods were compared with a database (distribution map) of seismic rockfalls. The results showed good overlap between RBF-predicted rockfall susceptibility zones and database (distribution map) of seismic rockfalls. Besides, in order to evaluate the statistical results of LR, MLP, and RBF models, the verification parameters with high accuracy such as density ratio (Dr), quality sum (Qs), and Receiver Operating Characteristic Curve (ROC) were used. By analyzing the susceptibility maps and considering the Qs index obtained by LR (2.94) and MLP (3.482), and RBF (4.344), it could be observed that the Qs of RBF were higher than that of LR and MLP. Moreover, based on the obtained value of AUC from LR (0.859), MLP (0.910), and RBF methods (0.956), it is seen that the RBF method provided a higher accuracy in predicting the probability of rockfalls occurrence caused by the earthquake of Changureh-Avaj in 2002 compared to LR and MLP methods.
      PubDate: 2018-06-22
      DOI: 10.1007/s10064-018-1323-5
       
  • Developing empirical relationships to predict loess slide travel
           distances: a case study on the Loess Plateau in China
    • Authors: Haijun Qiu; Peng Cui; Sheng Hu; Amar Deep Regmi; Xingang Wang; Dongdong Yang
      Abstract: To improve landslide hazard mapping quality, a functional relationship with travel distance prediction is essential. To obtain a more accurate empirical relationship for predicting loess slide travel distances, we developed a loess slide database for the central Loess Plateau using a combination of remote sensing image interpretations, existing datasets, and an intensive field survey. The loess slide travel distance was concentrated within less than 200 m, according to a cumulative frequency analysis. Our results reveal that the loess slide volume, slope height, and slope inclination of the sliding area control the travel distance, and this relation is well-described by a power law function. Furthermore, statistical analysis suggested that the equivalent coefficient of friction decreases with an increase in loess slide volume but increases with an increase in slope inclination. We compared the prediction performances of four empirical relationships proposed in this study using the mean absolute percentage error and Theil inequality coefficient methods. We discovered that the empirical relationship with three independent variables can more accurately predict the loess slide travel distance than the relationships with one or two independent variables.
      PubDate: 2018-06-21
      DOI: 10.1007/s10064-018-1328-0
       
 
 
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