Results 31 to 40 of about 13,620,505 (264)

Roof Fracture Characteristics and Strata Behavior Law of Super Large Mining Working Faces

Geofluids, 2021
Exploiting the working face in coal mines using a super long mining length and large mining height has become important for intensive production with high yield and high efficiency.
Guozhen Zhao, Baisheng Zhang, Lihong Zhang, Chao Liu, Shuai Wang   +4 more
doaj   +2 more sources

Research on automatic control technology of large mining height hydraulic support

Gong-kuang zidonghua, 2018
In view of problems of high roof pressure, serious spalling and roof falling and instable support in production of large height mining face, demands of automation control technology of the large mining height hydraulic support were analyzed.
WANG Haiju
doaj   +2 more sources

Abutment Pressure Distribution Law and Support Analysis of Super Large Mining Height Face

International Journal of Environmental Research and Public Health, 2022
Under the condition of the shallow coal seam, the laws of roof activity after large mining height longwall face mining and prevention measures for large-area roof weighting are problems that need to be solved urgently.
Li-Bo Zhang, Wenlong Shen, Xuelong Li, Yabo Wang, Q. Qin, Xu-Tao Lu, Tianxi Xue   +6 more
semanticscholar   +2 more sources

Mining Pressure Law and Working Resistance of Support in Face with Large Mining Height in Shallow Seam

Meikuang Anquan, 2020
In order to study the law of ground pressure appearance in the face with large mining height in shallow coal seam and determine its reasonable working resistance of support, the 5-2 coal 503 working face of Daliuta Coal Mine in Shendong is selected as ...
QIU Fengqi, ZHU Lei, GU Wenzhe, LIU Zhicheng, ZHANG Xinfu, PAN Hao, SONG Tianqi
doaj   +2 more sources

Research on Distribution Regularities of Dust Concentration and Granularity in Large Mining Height Working Face

World Journal of Engineering and Technology, 2023
Da-Qing Li, Qingyi Tu, Yang Yang
semanticscholar   +2 more sources

Control of Gob-Side Roadway with Large Mining Height in Inclined Thick Coal Seam: A Case Study

Shock and Vibration, 2021
The gob-side roadway of 130205, a large-mining-height working face in the Yangchangwan coal mine, was investigated in terms of the mine pressure law and support technology for large mining heights and narrow coal pillars for mining roadways. The research
Xie Fuxing
doaj   +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 the evolution law of failure depth of large mining height and ultra-wide working surface. [PDF]

Sci Rep
Advancements in coal mining technology and sophisticated equipment have popularized large-scale mining with broad working faces. This study uses the 6306 ultra-wide working face of Jincheng Sihe Coal Mine as a case to establish a mechanical model of the ...
Wang W, Li Z, Du F, Cao Z, Shi J, Zhai M, Liu M.   +6 more
europepmc   +2 more sources

Research on “Playing Football” Type Roof Control in Fully-Mechanized Mining Face with a Super-Large Mining Height under the Background of 5G+ Big Data

Applied Sciences (Switzerland)
With the increase of mining height at the working face, the influence range of roof fractures in the goaf increases, the advanced supporting pressure on the coal wall increases, ground pressure becomes more intense, and roof support becomes more ...
Fukun Xiao, Shan Lei
exaly   +2 more sources

Sensitivity Analysis of Overburden Displacement to the Evolution of Geometric Parameters in Large Mining Height Faces of Shallow Coal Seams

Advances in Civil Engineering
To reveal the influence of geometric parameter evolution of a shallow-buried and large-mining-height working face on the displacement and sensitivity of overlying strata, the 211 workface and 217 workface in the No.
Xiaolei Lv, Weiping Shi, Baowei Meng, Tan Li, Yaohua Yu, Fei Xiao   +5 more
doaj   +2 more sources