Volume 11, Issue 3
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The effect of increasing the water content on rocks characteristics from Şuior, Romania
(National Mining University, 2017-09-30)Purpose. Generation of relative humidity fluctuations lead to a further decrease in the resistance of rocks, which involves the swift evacuation of groundwater from mining works. For andesitic rocks strongly hydrothermal ... -
Shielded development of bottom gas hydrates
(National Mining University, 2017-09-30)Purpose. The research aims to show the system features of the existing development methods, which create significant risks of investment in the production of methane gas hydrates, as well as to disclose a new way and ... -
Substantiation of the method for constructing the diagram of the horizontal belt conveyor tightness
(National Mining University, 2017-09-30)Purpose. The method for constructing the diagram of the conveyor belt tightness, which satisfies the fundamental conditions of the mechanical system equilibrium and takes into account the influence of its centrifugal forces ... -
Stability of the coal seam roof during the sudden collapse of lateral rocks
(National Mining University, 2017-09-30)Purpose. To study the effect of dangerous manifestations of rock pressure (in the form of sudden lateral rock collapse) on the state of the coal seam roof developed in difficult mining and geological conditions by various ... -
Assessment of radioactivity of 226Ra, 232Th and 40K in soil and plants for estimation of transfer factors and effective dose around Mkuju River Project, Tanzania
(National Mining University, 2017-09-30)Purpose. To establish pre-mining indicators to assess radiological impact as a result of release of radionuclides to environment during uranium mining at Mkuju River Project radioactivity of 226Ra, 232Th and 40K in soil, ... -
Modeling the process of mineral rocks cutting with a tool made of polycrystallinе superhard materials
(National Mining University, 2017-09-30)Purpose. To analyze the process of rocks cutting by a tool made of polycrystallinе superhard materials (PSM). Methods. Mathematical modeling of rock destruction process. Findings. A model of deformation and fracturing ... -
Research into the influence of technical factors on rocks deformation during reworking of ore deposits
(National Mining University, 2017-09-30)Purpose. The aim of this work is to establish the relation of rocks deformation during reworking of ore deposits to mining and technical conditions and factors of mineral production based on the processing of surveying ... -
Selection of environmentally safe open-pit technology for mining water-bearing deposits
(National Mining University, 2017-09-30)Purpose. Substantiation of environmentally acceptable technologies for surface mining of water-bearing placer deposits, taking into account the parameters of mining systems elements and areas damaged during mining of mineral ... -
Gravitational and tectonic stresses in the rock mass and their determination by measurements in separate points
(National Mining University, 2017-09-30)Purpose. Stress state in rock mass is the most important factor affecting processes around mine working. The methods used for calculation of stresses based on hypotheses of elastic thrust, hydrostatic state or spherical ... -
Scale factors for conversion of forces on disc cutters for the main domestic and foreign methods
(National Mining University, 2017-09-30)Purpose. Disc cutter is an important tool which is used in tunneling to destroy the rock during excavation as it directly influences rock-breaking efficiency, advance rate and economy of a project. Thus, it is of critical ... -
Physical and mathematical modelling of the conditions of coal and gas outbursts
(National Mining University, 2017-09-30)Purpose. Experimental study and theoretical modeling of conditions initiating destructive processes and development of gas generation in coals. Methods. Analysis, generalization and statistical processing of experimental ... -
Optimization of blasting works during the destruction of masses with complex structure
(National Mining University, 2017-09-30)Purpose. To study the quality of crushing rocks with different strength properties, depending on parameters of the charges location and the blasting time. Methods. Based on the destruction of laboratory samples, histograms ... -
Coalbed methane: places of origin, perspectives of extraction, alternative methods of transportation with the use of gas hydrate and nanotechnologies
(National Mining University, 2017-09-30)Purpose. To investigate the main basic physical and chemical properties of coalbed methane (CBM), conditions of its formation and places of occurrence. Special attention is paid to CBM utilization using alternative methods ... -
Modeling of the power section of downhole screw motors
(National Mining University, 2017-09-30)Purpose. Downhole screw motors (DSMs) are commonly used for drilling wells of various applications. The problem is to ensure reliable operation of DSM, particularly its power section “rotor – stator”. To evaluate its ...
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