Search
Now showing items 31-40 of 56
Simulation of the support-enclosing rock mass interaction for deep mining
(National Mining University, 2018-03-30)
Purpose. To develop analytical model for a support-enclosing rock interaction to determine parameters for operational stability of deep mine workings while decreasing metal consumption and increasing efficient use of ...
Theoretical background of rock failure at hydraulic seam fracture and aftereffect analysis
(National Mining University, 2018-09-30)
Purpose. Theoretical substantiation of the methodological foundations of possible effects and aftereffects identification of the hydraulic seam fracture (HSF) technology.
Methods. The research structure and procedure ...
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 ...
Reconstruction of the primary organic productivity of Campano-Maastrichtian shales of Nkporo and Aptian-Albian Awi Formations, Calabar Flank using pigment yield index
(National Mining University, 2018-09-30)
Purpose. To derive the paleo organic productivity exemplified by the pigment yield index in order to resolve the controversy on the petroleum potentials of Nkporo and Awi Formations in Calabar Flank, Southeastern ...
Determination of the suitable drilling operating parameters in different geological formations El-Sharara Oil Field (South-Western Libya)
(National Mining University, 2018-09-30)
Purpose. The objective of this study is to determine the best operating conditions for the most notable drilling
parameters (i.e. weight on bit (WOB), rotary drilling speed (RPM), and characteristics of drilling fluid) ...
Power consumption of rock decomposition process during diamond core drilling using pulse flushing
(National Mining University, 2018-09-30)
Purpose. To study the impact of pulse flushing on the power consumption of rock decomposition during diamond core drilling.
Methods. Theoretical analysis, processing of the obtained experimental data.
Findings. The ...
Improvement of hole drilling technology for ore drawing intensification
(National Mining University, 2018-09-30)
Purpose. The improvement of hole drilling for increasing the mineral recovery ratio by ore drawing improvement through blasting.
Methods. The drilling parameters were examined for rock dumps. The means of experimental ...
Use of the energy of parametric oscillations to improve drilling indices
(National Mining University, 2018-09-30)
Purpose. Increase of the efficiency of using energy of parametric oscillations within the assembly of drilling string bottom by means of solving nonlinear-parametric equations of a “bit – drive motor – drilled-out rock” ...
Analysis of the factors influencing the level of professional health and the biological age of miners during underground mining of coal seams
(National Mining University, 2018-09-30)
Purpose. Setting of the work environment of workers at mining enterprises during thin coal seams extraction influence on the character and the rate of their aging by determination of the biological age and estimation of ...
Mitigating the adverse environmental impact resulting from closing down of mining enterprises
(National Mining University, 2018-09-30)
Purpose is to mitigate the adverse environmental impact in the context of both territory and water resources while closing down of mining enterprises.
Methods. Experiments and laboratory studies were carried out to determine ...