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Research on Non-Pillar Coal Mining for Thick and Hard Conglomerate Roof [PDF]
Energies, 2021 This article introduces a new non-pillar coal mining technology (i.e., Gob-side Entry Retaining by Roof Cutting (GERRC)) under the condition of thick and hard roofs.
Xiaoyu Liu +3 more
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HeliyonFor understanding the mechanical performance and strain energy evolution mechanism of thick hard roof sandstone samples, a sequence of uniaxial compression trials with acoustic emission (AE) monitoring were carried out.
Dongdong Qin, Zechao Chang, Ze Xia
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Study on Fracture Behavior of Directly Covered Thick Hard Roof Based on Bearing Capacity of Supports
Applied Sciences, 2023 Mine pressure at the working face is severe due to it being directly covered by a thick hard roof. To further investigate the technology of controlling the mine pressure of a thick hard roof, the upper working face of 13,121 in Gubei mine of Huainan ...
Jiawen Li +4 more
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Influence mechanism of thick hard layer on fracture and energy release characteristics of composite roof [PDF]
Scientific ReportsInvestigating the instability and energy release characteristics of layered roof structures is crucial for elucidating the mechanism of rockburst induced by strata fracture.
Xiao-shuai Song +5 more
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Combined blasting for protection of gob-side roadway with thick and hard roof
Journal of Rock Mechanics and Geotechnical EngineeringThe deformation control of surrounding rock in gob−side roadway with thick and hard roof poses a significant challenge to the safety and efficiency of coal mining. To address this issue, a novel approach combining directional and non-directional blasting techniques, known as combined blasting, was proposed.
Hongxu Song
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Ground control strategies for longwall top-coal caving panel in extra-thick coal seams with thick-hard roof [PDF]
Scientific ReportsThick-hard roof fracturing presents a significant challenge for disaster prevention in longwall mining. This study investigates the 15,311 south working face and develops a mechanical model to analyze energy release during both initial and cyclic roof ...
Rui Wang +4 more
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Research on blasting technology for thick and hard roof fracturing in isolated island coal mine working face. [PDF]
Sci RepAbstract In order to study the prevention and control technology for hard roof type coal burst in the isolated working face of the Chenjiashan coal mine, the 418 isolated working face was selected as the engineering case study. Based on the different impact danger zones and mining areas, a roof breaking blasting pressure relief technical ...
Huang W, Jing G, Ma L, Zhao L, Wang S.
europepmc +5 more sources
Frontiers in Earth Science, 2022 Aiming at the mining disaster of a thick hard roof, based on the analysis of the mining instability influence of the thick hard roof, this study constructs the mining bearing mechanical model of the thick hard roof by using mechanical theory and obtains ...
Qingwei Bu +5 more
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Energy Exploration & Exploitation, 2022 A thick-hard roof implies a large hanging-roof and high-frequency dynamic strata behaviour during mining, which may jeopardise personnel safety and equipment.
Baobao Chen, Changyou Liu, Bing Wang
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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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