Results 41 to 50 of about 1,845,683 (177)

Air leakage characteristics and comprehensive prevention of goaf side retained roadway of fully mechanized mining faces in Qincheng coal mine [PDF]

Scientific Reports
Mastering the deformation and air leakage patterns of gob-side retained roadway in fully mechanized mining faces, as well as the distribution characteristics of the gas flow field, is of great significance for the comprehensive prevention and control of ...
Xin Luo, Liang Chen, Bing Wu, Mengchen Sun, Tao Yang, Hongyang Yu   +5 more
doaj   +2 more sources

Study of Gob‐Side Entry Retaining Technology with Roof Cutting under Upper Roadway Condition [PDF]

Shock and Vibration, 2021
Gob‐side entry retaining technology with roof cutting (GERRC) has been widely used in flat and near‐flat coal seam conditions, but its application under inclined coal seam is still very deficient. In order to further improve the application system of GERRC and overcome the application difficulties under special geological conditions, this paper takes ...
Xingen Ma, Manchao He, Xuewei Sun, Jianfeng Li, Gang He, Enze Zhen   +5 more
openaire   +2 more sources

Structural Mechanical Characteristics and Instability Law of Roof Key Block Breaking in Gob‐Side Roadway [PDF]

Advances in Civil Engineering, 2020
The influence of mining on the upper section of working face leads to the fracture of the lateral key block of the roof. From the goaf to the coal body, a group of “left‐middle‐right” key blocks are formed. According to the three different spatial position structure relations formed by roadway and broken key block in practical engineering, the ...
Xinfeng Wang, Mingyuan Lu, Yuhao Gao, Wenbo Luo, Wengang Liu   +4 more
openaire   +4 more sources

Current situation of gob-side entry retaining and suggestions for its improvement in China

Meitan kexue jishu, 2023
Based on the article of “Status Quo and Suggestions for the Technology Development of Support along Gob-Side Entry Retaining in China” the work summarized the new technological development of gob-side entry retaining in China since the 21st century ...
HUA Xinzhu, LI Chen, LIU Xiao, GUO Yongjian, QI Yabao, CHEN Denghong   +5 more
doaj   +1 more source

The technology of gob-side entry retaining supported by flexible formwork wall with roof cutting and pressure relief for composite roof in deep mine

Gong-kuang zidonghua, 2021
In Lianghuai area of China, due to the influence of the large buried depth of the mine and the complicated roof conditions, when gob-side entry is retained, the roof deformation of the gob-side entry retaining is large, the coal side is easily extruded ...
SHEN Binxue1,2, ZHOU Hongfan3, ZHU Lei1,2, WU Yuyi1,2, QIU Fengqi1,2, WANG Guopu3, GUO Lin3, HUANG Jianbin1,2   +7 more
doaj   +1 more source

Mechanistic study and control of coal pillar deformation and failure in gob-side roadways with extra-thick seams and hard roof. [PDF]

Sci Rep
Zhou J, Shen Q, Li C, Jin H, Liu Y, Jiang H, Zhou T, Li C, Wang B.   +8 more
europepmc   +2 more sources

Stability analysis of inclined coal seam roadway along goaf considering non-uniform filling of gob gangue [PDF]

, 2023
After the mining of inclined coal seam, the roof falling gangue of goaf moves downward to fill the goaf due to gravity, which makes the strata behavior law of gob-side entry retaining in inclined coal seam different from that in horizontal coal seam.
Longwen WAN, Bo LI, Sheng WANG, Guoyu LI, Ying SHEN, Bo PENG, Ji LI, Rongguang ZHANG   +7 more
core   +1 more source

Cross fan-shaped roof-cutting blasting technology for preventing rockbursts in gob-side mining roadways [PDF]

Gong-kuang zidonghua
This study investigated the frequent occurrence of rockbursts in the advanced support areas of gob-side mining roadways. Taking a mine with severe rockburst occurrences as an example, based on an in-depth analysis of the occurrence patterns of 41 rockburst events, an engineering mechanics model of the interaction between the overlying roof of bocal ...
PAN Junfeng, LIU Shaohong, MA Wentao, GAO Jiaming, MA Hongyuan   +4 more
openaire   +3 more sources

Study on influence of advanced deep-hole blasting pre-splitting roof on stability of gob side entry retaining

矿业科学学报, 2019
In order to smoothly implement gob-side entry retaining and mining without coal pillar in 3207 working face of Nanyang Coal Mine,Shanxi Province,this paper proposes to carry out advanced deep-hole blasting pre-splitting roof near gob side supporting wall.
Hu Tao, Hou Gongyu, Li Zixiang, Li Zhuhe, Xie Bingbing, Chen Jianpeng, Cui Yongke   +6 more
doaj   +1 more source

Analysis of Influencing Factors of Roadway Stability and Adaptability Criterion for Gob-Side Pre-Backfill Driving

Mathematical Problems in Engineering, 2022
To reduce the loss of coal pillars between two adjacent longwall working faces, gob-side pre-backfill driving (GPD) procedure is suggested. This paper introduces in detail the principles and characteristics of the GPD procedure. Based on the arc triangle block (ATB) formed by the fractures of the main roof, the Winkel Elastic Foundation Beam model of ...
Rui Wu, Jianbiao Wu, Qijian Chen, Linfeng Li   +3 more
openaire   +1 more source