Results 21 to 30 of about 33,183,762 (290)
Numerical and in-situ investigation on the ground behavior of the end roof in fully mechanized caving face [PDF]
E3S Web of Conferences, 2021 Fully mechanized top coal caving is a major high-yield and high-efficiency coal mining method for thick seam mining. At present, it is affected by the further popularization and application of fully mechanized caving mining because the recovery rate is ...
Zang Chuanwei +5 more
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Determination of the Caving Zone and Fracture Zone Heights by Using the LK-Means Algorithm
Advances in Civil Engineering, 2023 The caving zone and fracture zone frequently appear after coal excavation. However, the caving zone and fracture zone can hardly be obtained with an empirical equation. Therefore, identifying a proper method to determine the caving zone and fracture zone
Ze Zhou +4 more
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Physical model simulation of block caving in jointed rock mass [PDF]
International Journal of Mining and Geo-Engineering, 2022 Incorrect estimation of undercut dimensions in the block caving method can lead to the cessation of caving operations and loss of a large portion of deposits. Numerical modeling is one of the methods for determining the minimum caving span. Numerical and
Behnam Alipenhani +2 more
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Research on automatic memory coal caving control
Gong-kuang zidonghua, 2019 For low coal caving efficiency, poor coal caving quality and other problems existing in manual coal caving control mode of fully-mechanized top coal caving working face, an automatic memory coal caving control method was proposed by referring to memory ...
CUI Zhifang, NIU Jianfeng
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Gong-kuang zidonghua, 2020 Due to the difference between fully-mechanized caving face and single stoping process face, there would be a big error in predicting gas emission rate on fully mechanized caving face by use of AQ 1018-2006 The Predicted Method of Mine Gas Emission Rate ...
WANG Xiaopeng
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Scientific Reports, 2021 In the process of longwall top coal caving, the selection of the top coal caving interval along the advancing direction of the working face has an important effect on the top coal recovery.
Chuang Liu, Huamin Li
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Mathematical Programming Application in Sublevel Caving Production Scheduling
Mining, 2021 Production scheduling determines the most beneficial mining sequence over the life of a mine. Developing a schedule that meets all mining aspects can substantially reduce mining costs and increase profitability.
Soroush Khazaei, Yashar Pourrahimian
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Research and application of intelligent caving technology in fully mechanized working face
Gong-kuang zidonghua, 2021 The traditional top coal caving control mainly relies on manual coal caving control, which uses single-round of sequential coal caving. The working face equipped with electro-hydraulic control system mainly adopts the two-round sequential coal caving ...
WU Tong, YU Rui, LIU Qing, WEI Wenyan
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Research of Caving Methods Based on Discrete Element
Gong-kuang zidonghua, 2010 The paper introduced three kinds of different methods of caving methods,namely single-interval caving,single-order caving and multi-interval caving.It used discrete element PFC3D software to simulate the three kinds of caving methods, obtained the ...
WANG Ye +3 more
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Numerical modeling of longwall top coal caving method at thar coalfield
JOURNAL OF METALS, MATERIALS AND MINERALS, 2020 Thar Coalfield in Pakistan is the largest reserve of lignite coal in the country, which is outlined by thick coal seams. The preferred mining method for these thick coal seams is the Longwall Top Coal Caving (LTCC).
Niaz Muhammad Shahani +6 more
semanticscholar +1 more source