Перегляд Mining of Mineral Deposits по назві
Зараз показуються 294-313 з 354
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Strength and strain quantities under brittle compression process of hard rocks
(National Mining University, 2018-03-30)Purpose. To examine the relationships between strength properties and strain quantities associated with the brittle compression process of hard brittle rocks. Methods. The data used in this paper were obtained from ... -
Structural, tectonic and fluid-dynamic aspects of deep degassing of the black sea megatrench
(National Mining University, 2017-03-30)Purpose. The problematical and controversial issues related to active gassing, deep structure, formation and evolution of the Black Sea are discussed. Methods. Geological and geophysical data (sonar, seismic and seismological ... -
Studies of new nonadhesive anchoring
(National Mining University, 2018-06-30)Purpose is to develop anchoring with nonadhesive high-strength roof bolting in terms of large pre-destructive deformations and its testing under laboratory conditions. Methods. Laboratory studies of hydration hardening ... -
Study and evaluation of the stability of underground mining method used in shallow-dip vein deposits hosted in poor quality rock
(Dnipro University of Technology, 2021-09-30)Purpose. This article proposes to analyze and determine the mining design for shallow-dip deposits hosted in poor quality rock. Methods. We used the UBC tool to find the optimal exploitation method, the Rock mass rating ... -
Study of change in the leaching solution activity after treatment with a cavitator
(National Mining University, 2019-12-30)Purpose. Increasing the valuable component content in a pregnant solution due to the activation of leaching solution with cavitation treatment in case of the borehole in-situ leaching (ISL). Methods. To obtain the cavitation ... -
Study of massif stress-strain state while mining the series of flat strata
(National Mining University, 2017-03-30)Purpose. To determine the effect of rock overworking and underworking on massif stress-strain state while extracting the series of flat coal seams. Methods. Mining, geological and technical conditions; current approaches ... -
Study of numerical simulation method modelling gas injection into fractured reservoirs
(National Mining University, 2019-06-30)Purpose. Fractures are the main flow channels in fractured reservoirs. The rapid flow characteristics of gas are outstanding in fractures. It is a major technical problem in the current oilfield development to calculate ... -
Study of protective properties of half-masks respirators used by miners
(National Mining University, 2016-12-30)Purpose. To define coefficient of protection of filtering respirators with elastomeric half-masks PR-7 in conditions of coal mines. Methods. Antidust respirators applied at mining enterprises of Ukraine were tested for ... -
Study of the plasma flow interaction with the borehole surface in the process of its thermal reaming
(National Mining University, 2018-09-30)Purpose. Study of the plasma flow interaction with the borehole surface in the process of its thermal reaming for determination of transient temperature distribution along the borehole surface and the average coefficient ... -
Study of the process of coal transfer by means of auger effector within the aggregate of boiling bed
(National Mining University, 2017-12-30)Purpose. The development and analysis of operation of a boiling bed aggregate with auger effector to feed and transfer coal inside a working chamber in the process of its thermal destruction. Methods. Method of graph ... -
Study on low-grade galena-barite ore beneficiation in Khuzdar, Balochistan, Pakistan
(National Mining University, 2019-03-30)Purpose. Galena and barite are the principal minerals of lead and barium respectively. Both minerals are used extensively in industries because of their distinct properties. In complex poly metallic ores, it is always ... -
Studying a correlation between characteristics of rock and their conditions
(National Mining University, 2020-09-30)Purpose is to determine dependences of velocities of elastic waves in isotropic rocks and anisotropic waves with orthotropic and transverse-isotropic symmetry upon pressure and depth to develop evaluation criteria and ... -
Studying a crack initiation in terms of elastic oscillations in stress strain rock mass
(National Mining University, 2016-06-30)Purpose. Deriving the criterion of a crack (joint) initiating under simultaneous effect of the rock stress state and elastic oscillations generated by an external source is the research purpose. Determining the quantitative ... -
Studying the heavy metals concentration in discharged water from the Trepça Mine and flotation, Kosovo
(National Mining University, 2020-12-30)Purpose. The purpose of this study is to assess the concentration of heavy metals in industrial discharge water from the Trepça Mine in Stantërg and flotation, and their impact in polluting the urban environment. Methods. ... -
Studying the influence of the carbon dioxide injection period duration on the gas recovery factor during the gas condensate fields development under water drive
(Dnipro University of Technology, 2021-06-30)Purpose. Studying the process of carbon dioxide injection at the boundary of the initial gas-water contact in order to slow down the formation water inflow into producing reservoirs and increase the final hydrocarbon ... -
Substantiating parameters of stratification cavities formation in the roof rocks during underground coal gasification
(National Mining University, 2016-03-30)Purpose. Underground coal gasification, as a complex and technically difficult process, should be supported in many aspects by computer simulations or analytical calculations of rock mass behavior. However, little is known ... -
Substantiating velocity of amber buoying to the surface of sludge-like rock mass
(National Mining University, 2020-12-30)Purpose is to substantiate the parameters and factors in terms of which amber can be mined efficiently from sand deposits using hydromechanical method. Methods. Laboratory studies and full-scale experiments of amber-bearing ... -
Substantiation and process design to manufacture polymer-concrete transfer cases for mining machines
(National Mining University, 2020-06-30)Purpose. To determine efficient polymer-concrete composition and to develop a process design to use the material to manufacture transfer cases for mining machines operating under very heavy conditions to improve their ... -
Substantiation of cable bolts parameters for supporting mine workings in conditions of laminated rocks
(National Mining University, 2016-03-30)Purpose. The development of approaches to the substantiation of the cable bolts installation parameters for the mine workings supporting in conditions of laminated rocks, taking into account the geometric parameters of the ... -
Substantiation of refractory lining influence on the electric furnace efficiency for the production of ferronickel
(Dnipro University of Technology, 2021-09-30)Purpose. The purpose of the research is to substantiate the possibility of replacing existing MgO bricks with the MgO-C bricks due to their resistance to the slag aggressiveness of the electric furnace and the Si content ...