Results 41 to 50 of about 5,124 (199)

Overburden Deformation Rule in Super High Seam Fully Mechanized Caving Mining of Thick Unconsolidated Stratum

Geofluids, 2022
It is urgent for westward coal mine development to control surrounding rock of thick unconsolidated stratum, thin basement rock, and super high seam under geological conditions.
Fei Liu, Zhanguo Ma, Yongsheng Han
semanticscholar   +1 more source

Research on the Influence of the Key Stratum Position on the Support Working Resistance during Large Mining Height Top-Coal Caving Mining

Advances in Civil Engineering, 2021
In recent years, in order to increase the coal recovery rate, the large mining height fully mechanized top-coal caving mining has been widely used because it has the advantages of both fully mechanized mining method and large mining height mining method.
Baisheng Zhang, Zhiping Yang, Chunxu Ji, Zefeng Guo, Haoyang Li   +4 more
doaj   +1 more source

Field Study on the Law of Surface Subsidence in the High-Intensity Fully Mechanized Caving Mining Working Face with Shallow Thick Bedrock and Thin Epipedon in Hilly Areas

Advances in Materials Science and Engineering, 2021
Shallow and thick coal seams occur extensively in hilly areas in Shanxi Province and Shaanxi Province, China. The surface damage and landslides caused by shallow fully mechanized caving mining have a very serious impact on the environment.
Yi Tan, Hao Cheng, Shuang Gong, Erhu Bai, Minchao Shao, Bingyuan Hao, Xiaoshuang Li, Han Xu   +7 more
semanticscholar   +1 more source

Analysis of the movement pattern of overburden and the form of spatial development of separation after mining in a fully mechanized caving face

Frontiers in Earth Science, 2023
For the fully mechanized caving face, it is easy to cause significant surface subsidence and other related problems after large-scale mining of coal seams, we should take some measures to solve them.
Wanpeng Huang, Mingfeng Yang, Yaxin Liu, Le Sui, Mingtao Gao, Xiao Wang, Haibin Gao   +6 more
semanticscholar   +1 more source

Study on key technologies of automatic fully-mechanized top-coal caving face with large mining height

Gong-kuang zidonghua, 2014
The paper introduced key technologies of automatic fully-mechanized top-coal caving face with large mining height, including automatic control of hydraulic support, machinery-tracked automation, automation of coal caving, remote control, lighting and low
FAN Zhizhong
doaj   +1 more source

Disastrous Mechanism and Concentration Distribution of Gas Migration in Fully Mechanized Caving Stope in Wuyang Coal Mine

Geofluids, 2021
The overrunning disaster of harmful gas tends to occur in the working face in thick coal seam with high gas concentration, as the fully mechanized caving stope has the characteristics of high mining intensity, high remnant coal, and high gas content. Therefore, the disastrous mechanism and concentration distribution of gas migration in fully mechanized
Li Chong, He Sifeng, Xu Zhijun
openaire   +2 more sources

Application of Cutting Roof Pressure Relief Pre-fracturing Technology in Fully Mechanized Caving Face in Extra Thick Coal Seam

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
doaj   +1 more source

Mining technology and support optimization design of super high fully mechanized caving and small mining ratio in hard and extra thick coal seam

Meikuang Anquan, 2021
In order to realize the safety, high efficiency and high recovery rate mining of 9-13 m thickness hard coal seam in Jinjitan Coal Mine, the top coal recovery rate and coal wall stability of different cutting heights are analyzed by theoretical analysis ...
MENG Xiangjun, ZHANG Jinhu, LI Mingzhong, YUE Ning, XU Yongxiang, TONG Peng, CAI Fenghua   +6 more
doaj   +1 more source

Overlying Strata Movement and Abutment Pressure Evolution Process of Fully Mechanized Top Coal Caving Mining in Extra Thick Coal Seam

Geofluids, 2021
Taken overlying strata of fully mechanized top coal caving mining (FMTCCM) in 15 m extra thick coal seam as the research object, the comprehensive research methods such as field investigation, theoretical calculation, and numerical analysis are used to ...
Yong-qiang Zhao, Yingming Yang, Xiaobin Li, Zhiqi Wang   +3 more
semanticscholar   +1 more source

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