Перегляд Mining of Mineral Deposits по назві
Зараз показуються 87-106 з 354
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Engineering characteristics of Egyptian limestone
(National Mining University, 2019-06-30)Purpose. Study of physical properties such as porosity, density and mechanical properties such as compressive strength and tensile strength of Egyptian limestone based on experimental investigations. Methods. In this paper ... -
Ensuring the specified position of multisupport rotating units when dressing mineral resources
(National Mining University, 2019-12-30)Purpose. The solution of the problem for determining a specified vertical displacement of supports in a rotating unit, taking into account the yielding in the crosscut of the supporting node, as well as the peculiarities ... -
Estimation of corrosion resistance of curing mixtures based on coal-bearing rocks from Western Donbass
(National Mining University, 2016-09-30)Purpose. Substantiation of possible use of coal-bearing rocks as a replacement for a part of the filler in the preparation of shotcrete for lining of mine workings in the conditions of mineralized mine water. Methods. The ... -
Estimation of the wear rate associated with ball mill of Mahd Ad Dahab Gold Mine, Saudi Arabia (KSA)
(National Mining University, 2018-09-30)Purpose. This study aims to estimate the wear of the middle chrome grinding balls in both dry and wet grinding media. The selected ball mill for this study is located at Mahd Ad Dahab Gold Mine, Saudi Arabia. Methods. The ... -
Evaluation of exploiting barite, the critical raw material in Slovakia, and benefits of its mining
(Dnipro University of Technology, 2021-06-30)Purpose. There are several deposits of critical raw materials in the Slovak Republic, but currently only one is mined. This is a barite deposit in Spiš, which shows an ever-lower volume of exploited raw material year-on-year. ... -
Evaluation of open pit slope stability using various slope angles and element types
(National Mining University, 2018-06-30)Purpose. The objective of this study is to demonstrate a method to select the optimal slope angle related to three principal factors: safety, productivity and mining costs. Also, it aims to investigate the accuracy of ... -
Evaluation of some ceramic properties of Gadabiu clay deposit (Kwali Area Council, Abuja, Nigeria)
(National Mining University, 2019-03-30)Purpose. To evaluate some ceramic properties of Gadabiu clay deposit, Kwali Area Council, Abuja Nigeria. Methods. Soil samples from the study area were subjected to various physical and mechanical tests such as; X-ray ... -
Evaluation of some renewable energy technologies
(National Mining University, 2017-12-30)Purpose. The study aims to outline and compare various renewable energy alternatives in view of the global warming crisis and depletion of fossil fuels which cause emissions of carbon dioxide. Carbon dioxide is a major ... -
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 ... -
Evolution of cracks in selvedge of the coal bed during its stationary working
(National Mining University, 2017-06-30)Purpose. To study rupturing of the coal/rock seam selvedge by natural gas-filled cracks as phenomena that prepare and initiate sudden outbursts of coal, rock, and gas during the steady movement of the face. Methods. The ... -
Experience of metal deposits combined development for South African enterprises
(National Mining University, 2017-06-30)Purpose. To solve technological and ecological problems of South Africa and other countries using the experience of Russian, Kazakh and Ukrainian miners in mining metals by the combination of traditional and new technologies. ... -
Experimental characteristics for deformation properties of backfill mass
(National Mining University, 2020-09-30)Purpose. Determining the deformation properties of backfill mass used to preserve the continuity of the coal-rock stratum enclosing mine workings. Methods. To achieve the purpose set, laboratory studies have been performed ... -
Experimental determination of angle values of the rocks full displacement when undermining them by breakage headings
(National Mining University, 2017-12-30)Purpose. Experimental determination of angle changes of full displacement of rocks by removing the breakage face from the face entry in different mining and geological conditions. Methods. On the basis of experimental ... -
Experimental research into the effect of some operation factors and rock properties on the rate of penetration
(National Mining University, 2020-03-30)Purpose. The purpose of this research is to investigate the effect of weight on bit (WOB), rotary speed (RPM), and some rock properties on the rate of penetration (ROP). Methods. Four types of rock were collected from ... -
Experimental research on the haulage drifts stability in steeply dipping seams
(Dnipro University of Technology, 2021-12-30)Purpose. Substantiation of the conditions for haulage drifts stability using different protection methods in steeply dipping seams based on a set of experimental studies. Methods. To achieve the purpose set, mine ... -
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, ... -
Experimental studies on the shear resistance of original coal-shale joint
(National Mining University, 2017-12-30)Purpose. Experimental study and theoretical modeling of the shear resistance of original coal-shale joint. Methods. A two-segment model was developed to describe the shear resistance-shear displacement curves obtained ... -
Experimental study of the thermal reaming of the borehole by axial plasmatron
(National Mining University, 2019-03-30)Purpose. To study rock spallation dynamics in the process of the borehole thermal reaming and analyze energy consumption of the borehole thermal reaming process by plasma jets of the axial plasmatron. Methods. Field ... -
Explorable and economically attractive mineral deposits in the Siberian and Far Eastern Federal Districts of Russia
(National Mining University, 2018-03-30)Purpose. Selection of the most explorable mineral deposits in the Siberian and Far Eastern Federal Districts of the Russian Federation as investment projects. Methods. System rank analysis of minimizing the risks of ... -
Exploration and mining evaluation system and price prediction of uranium resources
(National Mining University, 2018-03-30)Purpose. The paper introduces the development of the Uranium Resources Technical and Economic Evaluation Expert System (URTEEES) from the viewpoint of requirement analysis, system design, functional structure and application ...