Results 91 to 100 of about 3,405 (209)

Acid Mine Drainage Discrimination Using Very High Resolution Imagery Obtained by Unmanned Aerial Vehicle in a Stone Coal Mining Area

, 2023
Mining of mineral resources exposes various minerals to oxidizing environments, especially sulfide minerals, which are decomposed by water after oxidation and make the water in the mine area acidic.
Min Yang, Xiaomei Kou, Xin Zhang, Houfeng Li, Yongxiang Cao, Haixing Shang, Dianchao Han   +6 more
core   +1 more source

A method of determining the errors of segmented GRID models of open-pit mines constructed with the results of unmanned aerial photogrammetric survey

, 2023
The methodology of building a digital elevation model based on the results of aerial photogrammetric survey from an unmanned aircraft is proposed, which is based on the division of the initial point cloud into equal segments.
Vladimir N. Gusev, Arseniy K. Sukhov, Mikhail G. Vystrchil   +2 more
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Dynamic splitting mechanical properties and strength prediction model of freeze–thawed water-saturated sandstone

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
To evaluate the effects of freeze–thaw (F–T) cycling on the tensile performance and energy evolution of water-saturated sandstone, this study utilized slope rock specimens collected from a high-altitude open-pit mine in western China.
Ying Xu, Haotian Xie, Qiangqiang Zheng, Chengjie Li, Guang Yang   +4 more
doaj   +1 more source

Thermal Analysis of High-Power Water-Cooled Permanent Magnet Coupling Based on Rotational Centrifugal Fluid–Structure Coupling Field Inversion

Energies
An efficient and reliable heat dissipation system is essential for the safe and stable operation of high-power water-cooled couplers. However, thermal analysis methods accounting for the centrifugal effects on coolant flow remain limited.
Yuqin Zhu, Wei Liu, Hao Liu, Chuang Yang
doaj   +1 more source

Mechanisms behind the impacts of CO2 concentration on microbial methanogenesis in coal seams

Meitian dizhi yu kantan
Background Coal seams exhibit the extensive distribution of a variety of indigenous functional microorganisms. Among these, some archaea enable methane metabolism using CO2 as a substrate, providing the potential for the biological CO2 storage and ...
Junyu WANG, Bingjun LIU, Xiangqing JIANG, Ruifeng CHEN, Sheng XUE, Wanlong ZHOU, Yundu YANG   +6 more
doaj   +1 more source

Experimental study on evolution characteristics of coal permeability under triaxial stress conditions

Meikuang Anquan
Mining stress disturbance causes dynamic evolution of the pore and fracture structures of disturbed coal under complex loading conditions, leading to nonlinear changes in permeability, which significantly affects gas drainage efficiency.
Han GAO, Xiaoyu CHENG, Aitao ZHOU, Yuxuan ZHU, Haiqing SHUANG   +4 more
doaj   +1 more source

Drivable region detection for autonomous robots applied to South African underground mining

, 2012
Includes bibliographical references.This dissertation focuses on enhancing autonomous robots' capability to identify drivable regions in underground terrains. A system model that compares the drivability analysis of underground terrains using the entropy
Falola, Omowunmi Elizabeth
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METROLOGICAL SUPPORT OF MONITORING SYSTEMS BASED ON UNMANNED AERIAL VEHICLES

, 2019
The article discusses the fields and methods of application of unmanned aerial vehicles (UAV). Current legislation in Russia and in the world, significantly limit the use of UAV in monitoring. For the first time, we present a solution to the problem of a
A. S. Danilov, E. A. Kremcheev, Yu. D. Smirnov   +2 more
core   +1 more source

Rubber content governs strength, energy dissipation, and failure transition in cemented tailings backfill

Materials & Design
Cemented tailings backfill is widely used to maintain the stability of underground openings, yet its brittleness limits deformation tolerance and energy dissipation.
Changcheng Wang, Ke Yang, Tong Wang, Yongqiang Hou, Bo Ren, Qiang Fu   +5 more
doaj   +1 more source

Design of Highwall Mining at West Bokaro Division of Tata SteelLimited, India

, 2011
Highwall mining is a new technology, which can extend the life of opencast mines without disturbing thesurface dwellings and maintaining economy and productivity.
Sinha, A, Loui, J P, Roy,, P P
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