Volume 12, Issue 4
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Analyzing kinetics of deformation of boundary rocks of mine workings
(National Mining University, 2018-12-30)Purpose is to analyze nature of rock deformation and to estimate experimentally state of mine workings being supported under the conditions of areas disturbed by coal mining. Methods. The studies involved field instrumental ... -
Selection of accessing and development schemes for extracting reserves of ore body 2 in Irtysh deposit
(National Mining University, 2018-12-30)Purpose. Justification and selection of a rational scheme for accessing the second ore body of the Irtysh deposit based on a technical and economic comparison of its adopted competitive options. Methods. The main mining, ... -
Harmonization of modeling systems for assessing the electric-power consumption levels at mining enterprises
(National Mining University, 2018-12-30)Purpose. The purpose of the work is to study the system corporate features of electric-power consumption systems, the formation of applied scientific and methodological support, as well as economic and mathematical modeling ... -
Mechanism conversion process and timeliness of N2-ECBM
(National Mining University, 2018-12-30)Purpose. Based on the technology by which methane drainage is strengthened under gas injection, to examine the process of gas injection and the mechanism of action. Methods. Physical simulation experiment method, using ... -
Topical problems concerning both methods and economy to develop mineral deposits
(National Mining University, 2018-12-30)Purpose. Development of mining enterprises adaptation to changes in conjuncture of a product market relying upon its competitiveness while reducing expenditures connected with mineral stock extraction at the expense of ... -
Evaluation of volumetric strain quantities and types of volumetric strain curves under failure-deformation process of hard brittle rocks
(National Mining University, 2018-12-30)Purpose. The aim of this work is to show whether or not a relationship exist among the different volumetric strain quantities and to assess also whether the volumetric quantities are related to the different types of ... -
Review of geomechanical problems of accumulation and reduction of mining industry wastes, and ways of their solution
(National Mining University, 2018-12-30)Purpose. The identification of geomechanical problems of mining industry wastes accumulation and substantiation of the ways for their solution with the possibility of processing the watery technogenic feedstock by fine ... -
Choice and substantiation of stable crown shapes in deep-level iron ore mining
(National Mining University, 2018-12-30)Purpose. The aim of the paper is to select and substantiate stable shapes of crown pillars through determining regularities of rock pressure impacts on their stability depending on the crown shapes, mining depths and iron ... -
Analysis of the efficiency of geomechanical model of mine working based on computational and field studies
(National Mining University, 2018-12-30)Purpose is to substantiate the efficiency of geomechanical model of the mine working on the basis of qualitative and quantitative parameters of stress and strain state of the mine working and to compare the results of ... -
Nonlinear criteria and the influence of the average principal stress on rocks destruction
(National Mining University, 2018-12-30)Purpose. Consider possible series methods of Mohr-Coulomb nonlinear criterion that takes into account stresses in the plane of fracture. Investigate the influence of the average principal stress on rocks destruction when ... -
Controlling stress state of a hoisting shaft frame in the context of specific freezing process
(National Mining University, 2018-12-30)Purpose is to obtain regularities of a stress state of such multilayer system as neighbourhood rock mass – frozen soil – hoisting shaft frame in the process of numerical analysis to control a frame state with the selection ... -
Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria
(National Mining University, 2018-12-30)Purpose. Limestone and marble are carbonate rocks with several structural and engineering applications. The physical and mechanical properties of the rocks are fundamental as they determine their suitability for various ... -
Experimental studies of the seam openings competence in different methods of protection under pitch and steep coal seams development
(National Mining University, 2018-12-30)Purpose. Investigation of the seam openings competence in different methods of protection in complex mining and geological conditions of pitch and steep coal seams development of Donbas. Methods. To achieve this purpose, ... -
Optimization of blending operation for Aswan phosphate mines using linear programming
(National Mining University, 2018-12-30)Purpose. The economic value of phosphate is reduced when randomly blending raw phosphate produced from different mines. Therefore, the blending process of different raw phosphate ores to produce economic percentage of P2O5 ...
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