Results 11 to 20 of about 536 (168)

Innovative Development and Application of Fully Mechanized Top Coal Caving Mining Technology in Yankuang Group

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
doaj   +2 more sources

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
doaj   +2 more sources

Boundary quantitative characterization of the top-coal limit equilibrium zone in fully mechanized top-coal caving stope along the strike direction of working face [PDF]

Scientific Reports
In the process of fully mechanized top-coal caving mining, the top-coal is affected by mining-induced stress, and the stress varies along the strike direction of working face, so the boundary position of its entering the limit equilibrium state changes ...
Ding Lang, Xiaobo Wu, Yongping Wu, Panshi Xie, Zhuangzhuang Yan, Shuaiming Chen   +5 more
doaj   +2 more sources

Research on the Law of Top Coal Movement and Influence Factors of Coal Caving Ratio for Fully Mechanized Top Coal Caving Working Face

Energies
To investigate the movement law of top coal and the influencing factors of coal caving ratio in fully mechanized top coal caving faces, this study adopts the theory of dispersoid mechanics. First, a top coal flow model was established without considering
Jinhu Zhang, Zhiheng Cheng, Sheng Lei, Kai Guo, Liang Chen, Zherui Zhang, Jiahui Chen   +6 more
doaj   +2 more sources

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, Chen Miao, Chen Yang, Zhuang Xuean, Zhai Chenming, Zhu Hongmo   +5 more
doaj   +1 more source

Boundary Spatial Morphology of Top-Coal Limit Equilibrium Zone in Fully Mechanized Top-Coal Caving Stope in Steeply Dipping Coal Seam

Applied Sciences (Switzerland)
To address the stability control challenges of the “support-surrounding rock” system in fully mechanized top-coal caving faces within steeply dipping coal seams, this study employs an integrated approach combining theoretical analysis and numerical simulations, revealing the three-dimensional boundary morphology of the top-coal limit equilibrium zone ...
Panshi Xie, Xiaobo Wu, Wu Yongping
exaly   +3 more sources

Hydraulic weakening technology for unsupported top coal at the end of fully mechanized caving face

Gong-kuang zidonghua
To address the issue of excessive unsupported top coal length and delayed caving at the end of a fully mechanized caving face, a hydraulic weakening technology for face-end top coal in steeply inclined thick coal seams was proposed based on the coal ...
DONG Haofu, ZHANG Wei, SUN Guangjun, FU Huijian, LONG Zhaoxi, LIU Yang, LIU Dongliang, ZHU Xiaodong   +7 more
doaj   +2 more sources

Three-dimensional simulation of feeding and coal caving in fully mechanized caving face based on YADE

Meikuang Anquan, 2022
Based on the discrete element development environment YADE under Linux environment, this paper develops a three-dimensional simulation system for continuous feeding and coal caving in fully mechanized caving face.
YANG Yi, GAO Yang, LUO Kaicheng, WANG Keping, FEI Shumin
doaj   +1 more source

Study on the Mechanism of a Hanging Roof at a Difficult Caving End in a Fully-Mechanized Top Coal Caving Face

Sustainability, 2023
During the mining process of fully-mechanized caving faces, the roof of the roadway behind the working face easily forms an arched-shape hanging roof structure with the working face pushed forward, which results in potential hazards such as gas accumulation and large-scale roof collapse.
Hongtao Liu, Cheng Hao, Zijun Han, Qinyu Liu, Haozhu Wang, Jialu Liang, Dandan Zhang   +6 more
openaire   +1 more source

Study on overburden movement law and ground pressure behavior in fully mechanized top coal caving face under the disturbance of upper coal seam

Meikuang Anquan, 2023
In recent years, most of the coal mines in Zhungeer Coalfield have entered the mining of the second main coal seams, such as 6#, 10# and 11#, with an average thickness of more than 10 m, so most of the coal mines use fully mechanized caving mining ...
Hua NAN, Zhuoying WANG
doaj   +1 more source