Results 21 to 30 of about 1,698,756 (161)
Shock and Vibration, 2022 In the process of top coal caving mining, the caving time and the tail beam swing angle have an important impact on the evolution of the coal gangue boundary, which determines the top coal recovery rate and gangue content rate. Therefore, it is necessary
Qingliang Zeng +4 more
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Application of intelligent top-coal caving technology in overlying aquifer protection of extra-thick coal seam [PDF]
Meitan kexue jishuThe grassland areas in eastern Inner Mongolia and northern Xinjiang are rich in coal and groundwater resources. The mining fissures formed by high-intensity coal mining are easy to lead to the strong water-rich aquifer, and it is very easy to cause the ...
Weixuan CHENG +5 more
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Advances in Civil Engineering, 2021 Adopting an effective top coal caving method is the key to enhancing coal recovery and reducing gangue content for the fully mechanized top coal caving working face with extra-thick coal seams.
Shi Jiulin +3 more
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Automatic control system of top coal caving on fully-mechanized coal mining face
Gong-kuang zidonghua, 2015 In view of problems of large randomness, low efficiency of coal caving of artificial operation for top coal caving mining face, an automatic control system of top coal caving on fully-mechanized coal mining face was designed.
WEI Wenya
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Geofluids, 2020 This paper is aimed at solving the technical problems such as low recovery ratio and frequent disasters in steeply inclined and extrathick coal seams at residual high sectional coal pillar.
Wenhua Yang +4 more
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Dynamic Random Arching in the Flow Field of Top-Coal Caving Mining
Energies, 2018 The large mining height fully mechanized top-coal caving mining technique has developed rapidly and become the most extensively used mining method for ultra-thick coal seams. The arching of coal/gangue and the drawing out of gangue are peculiar phenomena
Ningbo Zhang +3 more
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Intelligent long wall top coal caving mining
Longwall Top Coal Caving (LTCC) mining technology is an effective method for mining thick and extra thick coal seams in China.Since its application in China in 1982, significant progress has been made, forming a variety of mining modes such as LTCC with large mining height, LTCC in extra thick coal seams and LTCC in steeply inclined thick coal seams ...
Wang, Jiachen, Li, Yang
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Structure and deformation measurements of shallow overburden during top coal caving longwall mining
International Journal of Mining Science and Technology, 2017 Mining induced pressures are strong and overburden failure areas are large in top coal caving longwall mining, which constrains high production and safety mining.
Sheng Li +5 more
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Radiation characteristics of natural gamma-ray from coal and gangue for recognition in top coal caving. [PDF]
Sci Rep, 2018 Recognition of coal and gangue (roof rock) is a key technology to realize fully mechanized top coal caving automated mining. This paper proposes to detect the instantaneous refuse content of drawn coal and gangue mixture during top coal caving by using ...
Zhang N, Liu C.
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Longwall top coal caving automation concept [PDF]
E3S Web of Conferences, 2021 This paper describes history of the longwall top coal caving technology. The devices capable to promote wider application of LTCC are discussed. The advantages, shortcomings and their elimination methods are specified. The authors designate the objectives to be met to implement the maximum potential of LTCC. The industry approach to these objectives is
Nikitenko Sergey +3 more
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