 Subjects -> MINES AND MINING INDUSTRY (Total: 81 journals)
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- Monitoring Potentially Hazardous Areas at Korobkovo Deposit of the Kursk
Magnetic Anomaly- Authors: V. V. Adushkin; S. B. Kishkina; V. I. Kulikov; D. N. Pavlov; V. N. Anisimov; N. V. Saltykov; S. V. Sergeev; V. G. Spungin
Pages: 605 - 613
Abstract: Abstract The article reports the results obtained in the trial of elements of the monitoring system for potentially hazardous areas at Korobkovo deposit of the Kursk Magnetic Anomaly. The system is based on the seismic and deformation measurements aimed to estimate and control shear stiffness of potentially hazardous faults. The fault shear stiffness is estimated through the analysis of parameters of seismic waves in the vicinity of a fault. The sources of seismic signals in the trial were explosions carried out at the neighbor surface and underground mines.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042596
Issue No: Vol. 53, No. 4 (2018)
- Methods and Models for Analyzing Methane Sorption Capacity of Coal Based
on Its Physicochemical Characteristics- Authors: V. N. Oparin; T. A. Kiryaeva; V. P. Potapov
Pages: 614 - 629
Abstract: Abstract The authors study the influence of physicochemical parameters on methane adsorption capacity of coal and offer the analytical method for the methane adsorption capacity for three-phased condition of methane. It is found that in the depth interval to 300 m below surface, methane adsorption capacity measured in lab can exceed natural gas content of coal obtained from geological exploration data by 30%, and the change in the thermodynamic condition of coal–methane system brings irreversible physicochemical consequences in terms of the altered ratios of physical states of the main components. There is no linear connection between natural gas content of a coal bed and its methane adsorption capacity with respect to occurrence depth. The application of Big Data in treatment and interpretation of large data flows is described. The theoretical data predicted using the proposed method and the experimental data on methane content of Kuzbass coal agree.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042608
Issue No: Vol. 53, No. 4 (2018)
- Geomechanical Estimation of Deformation Intensity above the Flooded Potash
Mine- Authors: A. A. Baryakh; N. A. Samodelkina
Pages: 630 - 642
Abstract: Abstract In focus of the article is minimization of aftereffects of the large-scale accident connected with the flooding of Berezniki Potash Mine in the Perm Krai. The authors construct a synthesized geomechanical model of the flooded mine to show the mining conditions, the process of salt rock dissolution and the elastoplastic behavior of deformation and failure of undermined rock mass in time. Approaches to analyzing intensity of degeneration of load-bearing elements of the open stoping system as a consequence of salt rock dissolving are proposed. The obtained estimates are the parametric framework for prediction of the ground surface deformation using 3D mathematical modeling. The geomechanical calculation results are used in the managerial decision-making on safety of the industrial and civil infrastructure within the hazardous territory.
PubDate: 2018-07-01
DOI: 10.1134/s106273911704262x
Issue No: Vol. 53, No. 4 (2018)
- Analysis of Two-Phase Gas–Water Flow in Carbonate Reservoirs
- Authors: C. Li; X. Zhou; S. You; J. J. Ibragimov
Pages: 643 - 654
Abstract: Abstract Gas–water relative permeability (GWRP) is measured in the tests of full-diameter cores. Based on the obtained GWRP curves, the standard normalized curves are plotted for three types of carbonate reservoirs: matrix pore, fracture and solution pore. The corresponding gas and water two-phase flow model was deduced by considering stress sensitivity and non-Darcy effect, and the IPR curve calculation and analysis of gas wells of the three types were carried out. Based on huge gap between the matrix and fracture permeability, the phenomenon of gas drive water mainly exists in the cracks. So the conventional gas–water relative permeability of fractured gas reservoirs was modified.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042631
Issue No: Vol. 53, No. 4 (2018)
- Gas Content and Structure of Coal in Donets Basin
- Authors: E. V. Ul’yanova; O. N. Malinnikova; A. V. Burchak; A. K. Balalaev; V. I. Baranovsky
Pages: 655 - 662
Abstract: Abstract The integrated study of coal is performed using methods of optical and electron paramagnetic resonances, infrared spectroscopy and Raman spectroscopy. It is found that gas content of coal is governed by the rank of coal and its material constitution as well as by the coal bed structure at the macro-, micro- and nano-levels which interwork. It is discovered that the size and amount of bubbles, of paleo-origin presumably, and the content of coalbed methane are related. The influence of each scale level of the coal bed structure on the gas content is revealed. The authors illustrate benefits of the integrated study of gasbearing coal with the physical methods that complement one the other at different levels of coal structure.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042643
Issue No: Vol. 53, No. 4 (2018)
- Numerical Modeling of Ground Movement due to Twin Tunnel Structure of
Esfahan Subway, Iran- Authors: E. Moosavi; R. Shirinabadi; E. Rahimi; M. Gholinejad
Pages: 663 - 675
Abstract: Abstract Tunneling operations in urban areas are always associated with surface and subsurface ground movement, which may affect the stability of nearby structures and utilities. One of the main issues in the analysis and design of tunnels, is ground movement after the support systems and settlement systems caused by excavation. This paper takes the discrete element calculation software of Universal Distinct Element Code (UDEC) to set three dimensional calculations models to simulate the construction of Esfahan subway tunnel, analyzing the displacement and stress dynamic response during the construction process. The paper also carries out the comparison analysis of the field measurement of the ground movement. The result indicates that the simulation objectively reflected the rules of movement during the construction process. The results show that the tunnels are stable before support system installation and the tunnel induced movement is allowable.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042655
Issue No: Vol. 53, No. 4 (2018)
- Finding Forces Required to Change Air Hammer Path in Soil
- Authors: B. B. Danilov; B. N. Smolyanitsky; A. I. Chanyshev; D. O. Cheshchin
Pages: 676 - 685
Abstract: Abstract The authors solve the problem on forces required to change drilling path of air hammers in soil. Soil mass is assumed a rigid–plastic medium with the Mohr–Coulomb yield, and the air hammer deviator is considered as a nondeformable body. The problem is solved in two stages: introduction of the deviator in soil and travel of the air hammer in soil with the rear deviated at a certain angle. The loads applied to the rear, the forces and the moment required to changing the path of an air hammer in soil are calculated.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042667
Issue No: Vol. 53, No. 4 (2018)
- Load-Bearing Capacity of Spiroid Gears of Mining Machine Drives under Peak
Loads- Authors: V. N. Anferov; R. K. Kovalenko
Pages: 686 - 693
Abstract: Abstract The substantiated dimensionless criterion of jamming characterizes relationship between the temperature of the contact links of spiroid gearing and the load-bearing capacity of an oil film. Based on the review of the existing tribotechnical systems used in scoring resistance testing, a physical model of spiroid gearing is selected. The test data obtained on a rolling-and-disc scheme of a friction assembly are presented. The relations between the friction coefficient in the spiroid gearing and the unit load are determined for the steel–steel material couples in a range of slip velocities and temperatures. A design procedure for spiroid gearing with respect to jamming is proposed.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042679
Issue No: Vol. 53, No. 4 (2018)
- Variation in Energy and Production Data of Pneumatic Percussive Machines
in the Uplands- Authors: V. E. Erem’yants
Pages: 694 - 701
Abstract: Abstract Under study is a production system composed of a power motor, compressor, pneumatic percussive machine and a treated medium. Based on the generalized theoretical and experimental data, the author relates productiveness of pneumatic percussive machines, energy intensity of rock breakage in the uplands with the rare atmosphere and elevation of the machine work site above sea level. The obtained results offer a reason-why approach to selection of the pneumatic percussive machine parameters for operation in the uplands.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042680
Issue No: Vol. 53, No. 4 (2018)
- Technical Approach to Prediction of Dragline Productiveness in Blasted
Rock Handling at Open Pit Mines in Permafrost Zone- Authors: S. V. Panishev; M. V. Kaimonov
Pages: 702 - 707
Abstract: Abstract The authors describe a technical approach to validating efficient regimes and process flow charts for draglines in open pit mining in permafrost zone; the approach integrates modeling data on temperature conditions of permafrost treated by blasting, geometrical parameters of a dragline face and interaction of work cycle time and face rock temperature in different seasons. It is shown that a dragline has the appreciably reduced productivity in slice-by-slice handling of broken-rock disintegration having negative temperature.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042692
Issue No: Vol. 53, No. 4 (2018)
- Method of Shaping Loading-and-Transportation System in Deep Open Pit
Complex Ore Mines- Authors: T. M. Kumykova; V. Kh. Kumykov
Pages: 708 - 717
Abstract: Abstract The article presents a procedure to select loading and transportation machines for an open pit complex ore mine. The choice of a shovel–dump truck production system is validated using a statistical testing method (Monte Carlo technique). Stop-watch readings allowed relating the productivity of the production system, degree of ore fragmentation and content of oversizes; the soundness of the choice of the production system based on the revealed criterion was proved. Using the law of the Palm flows, the authors determine the number and sequence of dump trucks for loading in a one-server system.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042702
Issue No: Vol. 53, No. 4 (2018)
- Modification of Structural, Chemical and Process Properties of Rare Metal
Minerals under Treatment by High-Voltage Nanosecond Pulses- Authors: V. A. Chanturia; I. Zh. Bunin; M. V. Ryazantseva; E. L. Chanturia; I. A. Khabarova; E. V. Koporulina; N. E. Anashkina
Pages: 718 - 733
Abstract: Abstract The authors have studied the mechanism of controlled modification of composition, structure, chemistry, physicochemical and process properties of columbite, tantalite, zircon and feldspar at the meso-, micro- and nanoscales after nonthermal treatment by high-voltage nanosecond electromagnetic pulses. The studies used methods: X-ray photoelectron spectroscopy, scanning electron and atomic force microscopy, potentiometric titration, electromigration chromatography, Kelvin probe force microscopy, microhardness metering and assessment of hydrophobic behavior and flotation activity of the minerals. It is found that changes in the chemical state of atoms on the surface of minerals are mainly connected with the sequential transformation of stages in the process of formation and modification of a functional cover of mineral surface, with variation in a ratio of different type hydroxyl groups on the surface of columbite, zircon and feldspar, which conditions contrast physicochemical properties of rare metal minerals and improves selectivity of their separation by flotation.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042704
Issue No: Vol. 53, No. 4 (2018)
- Physical Adsorption Validity in Flotation
- Authors: S. A. Kondrat’ev; E. A. Burdakova
Pages: 734 - 742
Abstract: Abstract The authors analyze collecting capacity of desorbable species of xanthates. Desorbable species of the reagent are understood as the species capable to transfer from a mineral particle to air bubble, i.e. to gas–liquid interface, at the moment of rupture of an interlayer between these interacting objects. Flotation process performance is evaluated at the presence of a mixed coating resulting from physical and chemical adsorption and in the presence of a chemisorption coating only. The rates of spreading products of interaction between butyl ethyl xanthates and lead nitrate over water surface are found. The spreading rates and collecting capacities of the mentioned reagents are correlated. It is found that an increase in the length of the hydrocarbon fragment increases collecting capacity of a reagent and the rate of spreading of its products on water surface.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042716
Issue No: Vol. 53, No. 4 (2018)
- Effect of Pulse-Discharge Treatment on Structural and Chemical Properties
and Floatability of Sulfide Minerals- Authors: N. K. Algebraistova; E. A. Burdakova; A. S. Romanchenko; A. S. Markova; D. M. Kolotushkin; A. V. Antonov
Pages: 743 - 749
Abstract: Abstract In terms of sulfide copper–molybdenum ore of Sorsk stockwork deposit (Republic of Khakasia), the authors discuss the option of selective dissociation of minerals. The scope of the discussion embraces the effect of pulsed-discharge treatment on particle-size indexes, structural and chemical properties and floatability of objects of the study. It is shown that the pulse-discharge treatment in a greater degree influences copper sulfides and levels their floatability while surface of molybdenite undergoes minor alteration. The pulse-discharge treatment allows enhancing flotation selectivity in separation of copper sulfides and molybdenite, and promotes removal of hydrophobic molybdenite film from quartz surface, which results in production of high-quality molybdenite concentrates.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042728
Issue No: Vol. 53, No. 4 (2018)
- Application of the Environmentally Non-Aggressive Dissolvents to Mobilize
Metals in Tailings in the Norilsk Region- Authors: A. G. Mikhailov; M. Yu. Kharitonova; I. I. Vashlaev; M. L. Sviridova
Pages: 750 - 755
Abstract: Abstract Under analysis is on-site extractability of nonferrous and noble metals from tailings by leaching with natural reagents (humus acids, water, lignin). Redistribution of nonferrous and noble metals in a percolation bed made of old tailings in the Norilsk copper–nickel ore field is studied. Kinetics of dissolving of nonferrous and noble metals under capillary ascensional percolation is investigated. It is shown that directional capillary percolation of solutions is applicable to extraction of nonferrous and noble metals under long-term mining waste storage.
PubDate: 2018-07-01
DOI: 10.1134/s106273911704273x
Issue No: Vol. 53, No. 4 (2018)
- Rebellious Gold Extraction from Gravity Concentrates and Placer Tailings
by Chemical Reagents- Authors: V. S. Alekseev; T. S. Banshchikova
Pages: 756 - 761
Abstract: Abstract When gold occurs in mining waste for a long time, it becomes coated with dense films of hydroxide of iron, manganese, copper and silver sulfides, hydromica powder and clayey particles, which greatly complicate concentration of such gold by gravity. An efficient method to remove such coatings from gold is treatment of waste using chemical reagents based on halogen-containing compounds. The article presents experimental results on extraction of fine gold from tailings of sluice boxes and dredging classifiers using such chemical reagents.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042741
Issue No: Vol. 53, No. 4 (2018)
- Integrated Processing Technology for Calcium-Bearing Alumosilicate Raw
Material- Authors: V. S. Rimkevich; A. P. Sorokin; A. A. Pushkin; I. V. Girenko
Pages: 762 - 770
Abstract: Abstract The undertaken research is aimed to reveal optimal physicochemical conditions for deep conversion of calcium-bearing alumosilicate raw material. An innovative technology of integrated extraction of nano-dispersion amorphous silica, alumina, calcium fluoride and other useful elements has been developed.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042753
Issue No: Vol. 53, No. 4 (2018)
- Effect of a Crushing Technique on Lead–Zinc Ore Processing
Performance- Authors: N. G. Barnov; A. A. Lavrinenko; O. G. Lusinyan; V. V. Chikhladze
Pages: 771 - 777
Abstract: Abstract Under consideration is the influence of various crushing techniques on the particle-size distribution and selectivity of dissociation of basic mineral components in the composition of Dalnegorsk complex ore under pretreatment. Distribution of basic elements per size grades is determined in crushing feed and in products of magnetic separation and flotation. Conditions of preparation and separation of disintegration products are described. The authors illustrate the change in the dissociation selectivity criterion in jaw crushing and in disintegration in a press to prepare different-size ore for processing by magnetic separation and flotation.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042765
Issue No: Vol. 53, No. 4 (2018)
- The Results of the Long-Term Research on the Development of
Anthropomorphic Soil in the Reclaimed and Successive Areas of the Most
Basin in Czech Republic- Authors: M. Řehoř; M. Jarolimová; L. Žižka; P. Schmidt; P. Vráblík; J. Vráblíková
Pages: 778 - 788
Abstract: Abstract The article summarizes the results of the long-term research on the anthropomorphic soil in reclaimed and successive areas of the Most Basin in Czech Republic. The main attention is paid to the main dump localities of the Most Basin monitored on the long-term basis. Based on the evaluation of the paedological development of the areas, the presence of contaminants and the development of the vegetation cover, the authors of the article propose optimal management methodology for the areas damaged by mining based on the detailed survey of individual localities within the Most Basin conditions. Emphasis is placed on the methodology of establishing areas left to undergo natural succession.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042777
Issue No: Vol. 53, No. 4 (2018)
- Analytical Description of Surface of Blasting-Formed Underground Cavities
by Laser Scanning Data- Authors: V. N. Oparin; V. F. Yushkin; V. K. Klimko; D. E. Rublev; A. S. Izotov; A. V. Ivanov
Pages: 789 - 800
Abstract: Abstract In terms of Tashtagol Mine, the authors address the issues connected with the configuration and surface of cavities formed by blasts of explosive charges in high-stress rock mass structured as a hierarchy of blocks. Laser scanning of a cavity offers the data on linear and angular characteristics of the cavity surface. The analysis of the surface structure provides details of the rock mass block hierarchy, which essentially influences formation of the roof and sidewalls of the cavity. Individual areas of the cavity surface are described with the help of approximation of measured coordinates of the cavity boundary in the cross sections using the second order curves, including circumferences and ellipses the radius of which are canonically connected with the phenomenon of zonal disintegration of rock mass.
PubDate: 2018-07-01
DOI: 10.1134/s1062739117042789
Issue No: Vol. 53, No. 4 (2018)
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