Results 51 to 60 of about 4,720,782 (169)
Design and Application of Automatic Control System for Fully Mechanized Mining Face in Coal Mine
, 2022 In order to improve the automatic control effect of fully mechanized mining face in coal mine, this paper combines the literature research method to analyze the disadvantages of traditional research and combines the demand analysis to analyze the ...
Zhi Yuan, Huanlei Chi, Yan Cao
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Idea of whole design of unmanned fully-mechanized coal mining face and its implementation method
Gong-kuang zidonghua, 2013 Unmanned or lee-manned fully-mechanized coal mining face is a core topic about coal mine safety. A view was pointed out that automatic coal mining should be pondered on from the whole fully-mechanized system, and fully-mechanized equipments should be ...
FU Guo-jun, YANG Ming-liang, XU Tai-shan
doaj
Automatic control system of top coal caving on fully-mechanized coal mining face
, 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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Energy Science &Engineering, EarlyView.This study addresses hard roof coal seam conditions by optimizing key stratum blasting‐cutting parameters through theoretical analysis, numerical simulation, and field tests. It proposes calculation methods for blast hole spacing and delay timing based on stress wave theory, controlling roadway deformation within 35 mm, thereby enhancing resource ...
Qiong Liu, Duanxiang Fu, Hongbin Li
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Meitan kexue jishu, 2023 During the driving of the fully mechanized driving face of the hydrogen sulfide coal roadway, due to the ventilation effect of the roadway, it is very easy to cause hydrogen sulfide gas accumulation and overrun in the front area of the driving face.
WANG Fuzhong +5 more
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Energy Science &Engineering, EarlyView.As the sublevel height increases, the top‐coal recovery amount gradually increases, but both the top‐coal recovery rate and the thickened top‐coal recovery rate show a downward trend, and the decline in the top‐coal recovery rate is gradually increasing. The comparison indicates that the optimal sublevel height is 20 m.
Hongsheng Tu +4 more
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, 2021 Based on the mining practice of Shendong Bulianta Coal Mine, this paper analyzes and summarizes the low-oxygen problems in the mining process of the fully mechanized working face in the overlying large goaf of the close distance coal seams, and finds ...
TIAN Chen, LI Bin
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Analysis of lump coal rate on fully mechanized coal mining face based on discrete element method
Gong-kuang zidonghua, 2019 In view of problem that existing lump coal rate research method cannot accurately express behavior of coal particles, an analysis method of lump coal rate on fully mechanized coal mining face based on discrete element method was proposed.
CHEN Li, ZHANG Yan
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Energy Science &Engineering, EarlyView.This study systematically investigates the fracture development mechanisms of water‐isolating soil layers under the coupled effects of repeated mining and groundwater seepage during the downward mining of shallow‐buried coal seams. The findings provide a theoretical basis for evaluating stratum stability and preventing roof water inrush.
Tao Yang +7 more
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Discussions on Some Security Mining Problems of Fully-Mechanized Top Coal Mining in “Three Soft” Large Inclined Angle Working Face [PDF]
, 2011 This paper studies insecure factors of fully-mechanized top coal mining in “three soft” large inclined angle working face, which have impacted the normal generation badly, including rib spalling, roof fall and equipment slide, etc.
Yanli, Zhu +4 more
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