Results 51 to 60 of about 1,698,756 (161)
Meikuang Anquan, 2020 In order to improve the top coal resources at both ends of fully mechanized top coal caving face in extra-thick seam and the recovery rate of coal resources during the initial caving, reduce the impact of initial weighting on the working face during the
SUN Zhenping
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Meitan xuebaoThe fully mechanized top-coal caving support is a critical device that serves both as a support mechanism and an active means for top-coal caving in fully mechanized top-coal caving mining operations.
Qingliang ZENG +5 more
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Method of tail beam posture prediction of top coal caving hydraulic support based on LSTM [PDF]
Fully mechanized caving is the main mining method for extra-thick coal seams in my country. The control accuracy of the caving actuator depends largely on the data feedback of the tail beam posture.
Wu XIONG, Jinglin ZHANG, Yupeng YAO
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Mining Safety of Longwall Top-coal Caving in China [PDF]
, 1999 Longwall top-coal caving technology has developed rapidly in China, in recent years. The application of longwall top-coal caving can double both the productivity and the efficiency of a working face and reduce the cost of production by 30 to 40%.
Zhai, Minghua, Wu, Jian, Qin, Yueping
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International Journal of Mining Science and Technology, 2015 Aimed at determining the appropriate caving–mining ratio for fully mechanized mining of 20 m thick coal seam, this research investigated the effects of caving–mining ratio on the flow fields of coal and waste rocks, amount of cyclically caved coal and ...
Ningbo Zhang, Changyou Liu, Mengsong Pei
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Study on precise control of coal caving mechanisms based on the kinematics of support structures
Gong-kuang zidonghuaPrecise control of the coal caving mechanism is a crucial foundation for realizing intelligent and unmanned top coal caving mining. The spatial relationship between the coal caving mechanism and the rear scraper conveyor, as well as the top coal ...
WANG Zuguang +6 more
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Gong-kuang zidonghuaContact coal-gangue identification requires studying the bearing characteristics of hydraulic support top beams in fully mechanized top coal caving. However, existing research primarily focuses on the bearing characteristics of supports before and after ...
HUO Yuming +3 more
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Deep Q-Network for Optimal Decision for Top-Coal Caving
, 2020 In top-coal caving, the window control of hydraulic support is a key issue to the perfect economic benefit. The window is driven by the electro-hydraulic control system whose command is produced by the control model and the corresponding algorithm ...
Xinwei Li +4 more
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Improving coal recovery from longwall top coal caving
, 2014 This paper develops a series of methodologies to improve the recovery rate from longwall top coal caving. Cavability of top coal is the most essential indicator to estimate the recovery rate.
Apurna Ghosh (20181219), Y. Gong (70953)
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International Journal of Mining Science and TechnologyCoal wall stability is a critical factor influencing coal mining efficiency and threatens the safety of working faces, where irregular coal wall surfaces significantly affect the contact and support effectiveness of the support plate, thereby impacting ...
Jiachen Wang +4 more
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