Results 61 to 70 of about 24,399 (150)

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 the research object.
openaire   +1 more source

Coal Wall Spalling Mechanism and Grouting Reinforcement Technology of Large Mining Height Working Face. [PDF]

Sensors (Basel), 2022
Liu H, Chen Y, Han Z, Liu Q, Luo Z, Cheng W, Zhang H, Qiu S, Wang H.   +8 more
europepmc   +1 more source

Key technologies and practices for safe, efficient, and intelligent mining of deep coal resources

Meitan kexue jishu
The geological conditions of deep coal resources are complex, and intelligent mining is the only way for the safe, efficient, and green development of deep coal resources. The complete set of intelligent mining technology and equipment that adapts to the
WEI LI, Xikui SUN
doaj   +1 more source

Coal‐wall spalling prevention mechanism using advance‐grooving pressure relief in the large‐mining‐height working face of a shallow coal seam

Energy Science & Engineering
In mining, the roof structure of a working face with a large mining height in a shallow‐buried coal seam is prone to cutting instability in front of the support, which causes support crushing and coal‐wall spalling. This study analyzes 2201 working faces
Wang Hongwei, Feng Li, Zhao Zhouyan, Li Yanjun, Cao Peipei, Jiao Jianqiang, Jiang Baolin, Liu Yong   +7 more
doaj   +1 more source

Research on Overburdened Rock Structures and Support Resistance of Shallow Buried Large Mining Heights Based on Sheet Gangs

Applied Sciences
In the mining of shallow coal seams, the increase in mining height will lead to a sharp increase in the probability and degree of coal wall spalling. Rib spalling will affect the normal production of coal mines and may also threaten the safety of miners.
Pei Zhang, Yang Chen, Yibo Wei, Zhuo Li, Liqiang Dong   +4 more
doaj   +1 more source

Stability Control of Multilayer Roof Strata in the Large Mining Height Gob-Side Entry: A Case Study

Applied Sciences
Roof separation, destabilization and collapse of multilayer roof structures are difficult to control in large mining height gob-side entries due to severe mining pressure.
Yong Chen, Yingpeng Wang, Zhengyuan Qin, Feng Yang, Vivek Agarwal   +4 more
doaj   +1 more source

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

Sci Rep
Li G, Zhang H, Li M, Shen Z, Tian A, Wang L.   +5 more
europepmc   +1 more source

Strong mine pressure appearing mechanism and control at deep buried working face with large mining height

Meitan kexue jishu
During the mining of the adjacent working face, the strong mine pressure caused by the hard thick roof has obvious zoning characteristics due to the mining of the previous deeply buried large mining height working face. The mechanism of the strong mine pressure at the adjacent working face is the basis for realizing safe and efficient mining.
Zhaoyuan LEI, Maoping ZHAO, Tuanjie LI, Feng LI, Lei LI   +4 more
openaire   +1 more source

Study on the evolution law of failure depth of large mining height and ultra-wide working surface. [PDF]

Sci Rep
Wang W, Li Z, Du F, Cao Z, Shi J, Zhai M, Liu M.   +6 more
europepmc   +1 more source

Research on surrounding rock control technology of roof cutting and pressure relieving for roadside filling in gob-side entry retaining of large mining height panel. [PDF]

Sci Rep
Weiyong L, Shengjun L, Yaohui S, Tao G, Wansheng M, Xiaowu Z.   +5 more
europepmc   +1 more source