Results 41 to 50 of about 934 (182)
International Journal of Distributed Sensor Networks, 2019 Longwall mining is a productive mining method that has been widely used in China, the United States, Australia, and Europe. However, due to the subsidence caused by coal mining activities, the phenomenon is complex, longwall mining brings the overburden ...
Yang Li +4 more
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Roof Bolting Anchoring Performance Research on the Entry under the Gob of Close-Distance Coal Seam
Geofluids, 2022 Seam spacing plays a crucial role in selecting roof bolting of the close-distance coal seam. This work utilized three methods to determine the minimum roof bolting seam spacing of the lower coal seam (LCS) entry after the upper coal seam (UCS) mining.
Yongjie Yang, Gang Huang, Haiyu Ji
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Gong-kuang zidonghua, 2020 In view of problem that using existing ultra-close coal seam combined mining research methods to obtain mining staggered distance has bigger errors, taking No.9 and No.10 coal seams of a coal mine as engineering background, the mining pressure law of ...
PENG Zhiyan, ZHA Wenhua
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Meikuang Anquan, 2020 Based on the engineering background of gas control in the close distance coal seams goaf in Xiaohuigou Coal Mine, the experimental study on the pressure relief gas extraction of goaf with the large diameter borehole in close distance coal seams is ...
SHAO Guoan, ZOU Yongming
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Geofluids, 2021 For the sake of studying the catastrophe mechanism of stress-fissure coupling field in mining close distance seams in southwest China, a test working face in Guizhou province in southwest China is adopted and researched by the methods of numerical ...
Suo Jie +5 more
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Attenuation law of concentrated stress under coal pillar of close coal seams and its application
Scientific Reports, 2022 When mining the multiple coal seams in close proximity, the coal pillar left in the goaf causes stress concentration in the floor. The layout of mining roadway in lower short distance coal seam is affected by the propagation of concentrated stress caused
Qingtao Kang +3 more
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An Improved Composite Fly Ash Gel to Extinguish Underground Coal Fire in Close Distance Coal Seams: A Case Study [PDF]
Advances in Materials Science and Engineering, 2020 Fire extinguishing with the superior performance of fly ash composite colloid material is a cost‐effective colloid fire prevention technology. In this paper, a new powder additive (suspending agent (XK‐XJ) and gelling agent) was developed for the existing fire extinguishing technology of fly ash compound colloid.
Jun Guo +4 more
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Biological Reviews, EarlyView.ABSTRACT Recent methodological development in phylogenetic inference has focused predominantly on molecular data. However, renewed interest in other data types, particularly morphological data, has followed from the increased recognition of the power of total evidence and tip‐dating approaches, including fossil data, for inference of time‐scaled trees ...
Melanie J. Hopkins +9 more
wiley +1 more source
Graphene Materials for Sustainable Energy Applications: A Contemporary Perspective
Carbon Energy, EarlyView.ABSTRACT Graphene has garnered significant attention as a promising material with great potential for contributing to sustainable energy initiatives, such as RE100 (100% renewable energy initiative) and CF100 (100% carbon‐free initiative). This review aims to explore the potential of graphene for advancing renewable energy applications by highlighting
Niraj Kumar +3 more
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Advances in Materials Science and Engineering, 2022 In order to mater the reasonable layout basis of the terminal mining line position in the repeated mining of close-distance thick coal seams, taking Yan mine as the engineering background, we conducted theoretical analyses, numerical simulations, and ...
Fulian He +7 more
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