Results 21 to 30 of about 1,016,619 (289)
Shock and Vibration, 2021 In order to study the fracture patterns of hard main roof in longwall top coal caving (LTCC) with large mining height, a two-dimensional physical similarity model was created to simulate the mining process of No.
Jinkai Liu +3 more
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矿业科学学报, 2021 Yima coal field has an extra-thick hard rock strata, which is the main cause of many dynamic disasters in the mining area. Based on the mining face 21221 of Qianqiu mine in Yima coal field, Henan Province, China, this paper studies the movement ...
Wang Hongwei +5 more
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Sustainability, 2022 In order to ensure the application of gob-side entry retaining by roof cutting for thick and hard sandstone roofs, the key technology of pre-split blasting was studied. The LS-DYNA was used to analyze the blasting effect of the energy-gathering pipe. Using the methods of theoretical analysis and numerical simulation, it was determined that the optimal ...
Chaowen Hu +5 more
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Mechanical Analysis of the First Fracture Characteristics of Hard Roof of Extra-thick Coal Seam
Meikuang Anquan, 2020 In order to investigate the failure mechanisms of the hard roof in the fully mechanized caving face in the extra-thick coal seam, the mechanical analysis model of the first breaking of the hard top roof in the fully mechanized caving mining of the extra-
LIANG Shaping, LU Yinlong, GUO Peng, WU Bingzhen
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Cool roof technology in London: An experimental and modelling study [PDF]
, 2013 This is the post-print version of the final paper published in Journal of Energy and Buildings. The published article is available from the link below. Changes resulting from the publishing process, such as peer review, editing, corrections, structural ...
Kolokotroni, M +8 more
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Geofluids, 2020 The compound dynamic disaster of coal and gas outbursts and rockburst is a typical hazard jeopardizing the mining of the high gas content coal seam under a hard roof condition.
Litong Dou +3 more
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Meitan xuebao, 2023 In the engineering practice of gob side entry retaining by roof cutting, the height and angle of roof cutting are the direct influencing factors, and the reasonable roof cutting parameters allowed by the hard roof with a wide range of roof thickness change have their particularity.
Xuhui XU +5 more
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, 2022 S.98-117Flachdächer sind Dachkonstruktionen ohne oder mit geringer Dachneigung. Sie weisen über die gesamte Dachfläche eine wasserundurchlässige Schicht auf. Die Abgrenzung zu flach geneigten bzw. geneigten Dächern liegt bei ca.
Bludau, C., Schunck, E.
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Scientific Reports, 2023 Based on the disaster characteristics and the geo-conditions at the scene, in this study, the occurrence mechanism of a serious rock burst accident that occurred in the Tangshan Coal Mine, China, was analysed.
Ying Chen +5 more
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Development status and Prospect of directional hydraulic fracturing technology for coal mine roof [PDF]
E3S Web of Conferences, 2020 Aiming at the harm and control methods of thick and hard roof in coal mine, the paper firstly analyzes the advanced control methods of thick and hard roof, such as directional shaped charge blasting roof control technology, hydraulic fracturing roof ...
Liangwei LI
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