Results 31 to 40 of about 4,409 (252)

Study on Rational Width of Entry Protection Coal-Pillar in Large Mining Height Working Face

Advanced Materials Research, 2011
This paper demonstrates the attempt to identify a reasonable chain pillar width in the condition of large mining height, along with a case study at the gateway of No.1103 panel with large mining height in Suancigou Mine. Theoretical calculation and numerical simulation were employed as the main approaches during the research to figure out the rational ...
Xu Feng Wang, Dong Sheng Zhang, Ting Feng Cui, Jin Liang Wang, Wei Zhang   +4 more
openaire   +2 more sources

Breaking mechanism of hard thick roof during the life cycle of large mining height working face

Meitan kexue jishu
The hard and thick roof is the force source layer of the large mining height working face. During the life cycle of different large mining height working face, the boundary conditions of the roof are different, which leads to the breaking pattern of the ...
Zhaoyuan LEI, Feng LI, Zikui ZHAO, Lei LI, Xingli HUANG   +4 more
doaj   +2 more sources

Study on Fracture and Stress Evolution Characteristics of Ultra-Thick Hard Sandstone Roof in the Fully Mechanized Mining Face with Large Mining Height: A Case Study of Xiaojihan Coal Mine in Western China

Advances in Civil Engineering, 2018
Ultra-thick hard sandstone roofs present high thickness, poor delamination, and wide caving range. The strata pressure of the working face during actual mining increases, having a significant influence on the safe mining of the working face.
Feng Ju, Meng Xiao, Zequan He, Pai Ning, Peng Huang   +4 more
doaj   +2 more sources

Feasibility Study on Roof Cutting and Pressure Relief Technology of Gob-side Wall Retaining in Large Mining Height Working Face

Meikuang Anquan, 2020
To solve the problem of large deformation of concrete wall caused by large bearing capacity of gob-side wall retaining in large mining height working face, the concrete bearing structure of gob-side brick retaining was determined for the site conditions of Wangzhuang Coal Industry.
SHEN Hao, ZHANG Baisheng, HE Xin
openaire   +3 more sources

Study on Characteristics of Front Abutment Pressure and Rational Stop-Mining Coal Pillar Width in Large Height Working Face

Processes
The width of a stop-mining coal pillar is of great significance to the stability of the surrounding rock of the main roadway and the safety of production in the mine. This paper focuses on the west panel of Sihe Coal Mine as the engineering background, analyzes the evolution characteristics of front abutment pressure in the mining area under conditions
Wei Yu, Gangwei Fan, Dongsheng Zhang, Wenhao Guo, Wenhui Zhang, Shizhong Zhang, Zhanglei Fan   +6 more
openaire   +2 more sources

Research on surrounding rock failure law of large mining height working face in thick loose layer based on microseismic monitoring

Gong-kuang zidonghua, 2022
The research on the movement law of surrounding rock under the condition of thick loose layer and thin bedrock mostly adopts theoretical research methods such as establishing a mechanical model and numerical calculation. It lacks research based on field dynamic measurement.
HENG Peiguo, ZHAI Changzhi, XIN Chongwei, WANG Yanlu, CHEN Yang   +4 more
openaire   +3 more sources

Surface damage reduction effect of ultra-high working face in Shangwan coal mine

Scientific Reports
Green mining is the basic background of high-quality mining, and source reduction is the most important part, among which the optimization of working face height and length is the most active.
L. I. U. Xinjie, Yang Yingming, Zhao Yongqiang, WANG Xiaolong, Liu Gang, Xu Zhuhe   +5 more
doaj   +2 more sources

Key structure and bearing characteristics of 10 m super large mining height support [PDF]

Meitan xuebao
ZYA29000/45/100D two column shield type hydraulic support was developed for controlling the surrounding rock of a 10 m high fully mechanized mining face.
Huijun HAN, Yajun LEI, Jinhu ZHANG, Cundi HAN, Mingsheng ZENG   +4 more
doaj   +2 more sources

Study on roof breaking mechanism and support stability of steeply dipping seam and large mining height

Energy Exploration & Exploitation
Taking the steeply dipping and large mining height working face of a mine as the engineering background, through the combination of physical simulation experiment, numerical calculation, theoretical analysis and field monitoring, based on a comprehensive
Bosheng Hu, Panshi Xie, Baofa Huang, Yongping Wu, Jianjie Chen   +4 more
doaj   +2 more sources

Study on coal wall spalling mechanism of large mining height working face based on folding mutation theory [PDF]

Scientific Reports
Guosheng Li, Hui Zhang, Mengzhen Li, Zhenhua Shen, Anfeng Tian, Longjing Wang   +5 more
openaire   +2 more sources