Results 41 to 50 of about 25,519 (265)
Adaptability Analysis of Full Height Mining at One Time of Deep Soft Thick Coal Seam
Frontiers in Earth Science, 2022 With the improvement of technology and equipment, it is preferred to adopt full-height mining at one time when conditions permit. According to the specific geological conditions of no.
Qinghai Li +5 more
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Effect of Face Length in Initial Mining Stage of Fully Mechanized Top-coal Caving Face With Large Mining Height [PDF]
Geotechnical and Geological Engineering, 2021 Abstract Based on the field measurement of the end resistance of the support during the initial weighting of the basic roof and the macroscopic mine pressure behavior during the weighting period of 101,22211,103 and 301 fully mechanized caving face in Changchun Xing Coal Mine, the mine pressure law of the working face is summarized and compared,
Jianhang Wang +4 more
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Meikuang Anquan, 2020 This paper systematically summarizes the development process of fully mechanized top coal caving technology and equipment in Yankuang Group in recent 30 years.
MENG Xiangjun, LI Mingzhong, YUE Ning, SUN Jishuang
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Prevention Technology for Strong Mine Pressure Disaster in the Hard-Roof Large-Mining-Height Working Face [PDF]
Shock and Vibration, 2020 The movement and destruction of the hard roof in a stope is an important reason for the occurrence of strong ground pressure disasters at the working face. Considering Tongxin Coal Mine as the engineering background, the stress distribution law of the surrounding rock and the overburden rock damage characteristics of a large-mining-height working face ...
Hongfei Duan, Lijuan Zhao
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, 2023 Coal mining has gradually entered the deep mining era, and large-height mining is an important way to mine thick coal seams in the deep. The high coal wall will inevitably make the distribution of the overburden structure in the coal mining face more ...
Guochuan Zhang +5 more
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IOP Conference Series: Earth and Environmental Science, 2020 Abstract In terms of the problems of the development height of the “two zones” of overburden in the fully mechanized mining face was difficult to predict, taking the 31303 working face in Chahasu coal mine as an example, methods of empirical formula, leakage of drilling fluid and borehole colour TV were used for prediction and ...
Mingze Du, Fanlong Kong, Donghao Wang
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Shock and Vibration, 2020 In order to study the changing rules of displacement filed and stress field of overlying strata on isolated pillar with filling mining method, a self-designed model of isolated pillar with an equivalent mining height and a monitoring system of stress is ...
Yang Chen +5 more
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Overburden destruction structure model and mechanism of mine pressure in Caojiatan coal mine with 10 m super large mining height [PDF]
Meitan xuebaoThe successful mining of 10 m ultra-high working face in Caojiatan coal mine marks a new level of full height mining technology in China’s extra-thick coal seam. Based on the pressure, displacement and energy sensors, the mining of ultra-high mining face is monitored comprehensively, the characteristics of mine pressure behavior were clarified, the law
Zhen ZHANG +7 more
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Meikuang Anquan, 2020 There are a lot of coal left in goaf at the both air inlet and outflow sides of large mining height face, where the air leakage is large, and large scope of spontaneous fire takes place easily.
ZHAO Like, ZHANG Xinhai, ZHENG Zhongming
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Geofluids, 2022 The migration law of overlying strata on working face is of great significance for safe mining of working face. In this paper, theoretical calculation, numerical simulation, and similar simulation are used to study the distribution characteristics, migration, and fracture law of key strata in the overlying strata of 130204 working face of Y.C.W coal ...
Hongtao Liu +5 more
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