Results 11 to 20 of about 140,971 (281)

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   +4 more sources

Study on Surrounding Rock Control and Support Stability of Ultra-Large Height Mining Face

Energies, 2022
Surrounding rock control and support stability in the process of coal seam mining in ultra-large height mining face are the key to normal mine operation.
Sheng Wang, Xuelong Li, Qizhi Qin
doaj   +3 more sources

The Roof Safety under Large Mining Height Working Face: A Numerical and Theoretical Study

Minerals, 2022
As an important technology of thick coal seam mining, fully mechanized mining with a large mining height has high mining efficiency. In order to study the roof safety control of large mining height working face, the 122106 working face of Caojiatan coal mine is taken as the engineering background.
Xiaofang Wo, Guichen Li, Jinghua Li, Sen Yang, Zhongcheng Lu, Haoran Hao, Yuantian Sun   +6 more
openaire   +3 more sources

Study on Overburden Fracture and Structural Distribution Evolution Characteristics of Coal Seam Mining in Deep Large Mining Height Working Face

Sustainability, 2023
Coal mining has gradually entered the deep mining era, and large-height mining is an important way to mine thick coal seams in the deep. The high coal wall will inevitably make the distribution of the overburden structure in the coal mining face more complicated, and the large buried depth will also cause more intense mine pressure.
Jianguo Zhang, Xiaofeng Qin, Shuaitao Liu, Haijian Su, Zhanbiao Yang, Guochuan Zhang   +5 more
openaire   +3 more sources

Instability Mechanism, Pressure Relief, and Long Anchorage Control Countermeasures for Surrounding Rock of Strong Mining Roadway at Large Mining Height Working Face

Minerals, 2023
Double-roadway tunneling could mitigate the contradiction between mining production needs and tunneling speed, which is pivotal to the sustainable development of underground mines. However, it is very difficult to control the stability of a mining roadway on an adjacent working face suffering from strong mining disturbance due to double-roadway ...
Deyu Qian, Hexi Jiao, Jinping Deng, Jingxuan Yang, Mingzhi Jiao, Guihong Xian, Chenshi Yu, Yingli Zhu, Jiale Liu, Sen Huang, Binyong Li   +10 more
openaire   +3 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

Determination of working resistance based on movement type of the first subordinate key stratum in a fully mechanized face with large mining height [PDF]

Energy Science & Engineering, 2019
AbstractThe increase in extraction height will increase the mining‐induced overlying strata failure height. In this scenario, the strata pressure behavior is strong in a fully mechanized face with large mining height (FMFLMH), which frequently causes coal wall falls, roof falls, and hydraulic support failure accidents (e.g., support closure and ...
Bo Li, Yunpei Liang, Quanle Zou
openaire   +4 more sources

Evolution law of water-conducting fault zone in large mining height working face under sandstone aquifer of Luohe Formation

Meikuang Anquan, 2021
Aiming at the problem of safe coal mining under the sandstone aquifer covering Luohe Formation in the thick coal seam mining face of Xunyao Mining Area, theoretical analysis, similar material test and numerical simulation were used to study the ...
YANG Yuliang, XU Zhuhe
doaj   +2 more sources

Influence of joint fissure occurrence on stress distribution of coal wall in large mining height [PDF]

Scientific Reports
In order to ensure the stability of coal wall of fully mechanized mining face with large mining height, Aiming at the prominent problem that the rib spalling rate of coal wall in fully mechanized mining face with large mining height is high and is ...
Weibin Guo, Yichen Gao, Gang Wang
doaj   +2 more sources

Theory of coal wall spalling and cooperative control by “support-destressing” in 10 m ultra-large mining height working face

Meitan xuebao
Coal wall spalling is one of the main factors restricting the safe production of 10 m ultra-large mining height working face.In response to the problem of unclear mechanism of coal wall spalling and difficult control of surrounding rock in the 10 m ultra-
Jiangbin LIU, Zhizeng HUANG, Qianjin LIU, Zhen ZHANG, Cundi HAN, Xingyu LIN, Rongshan MA, Zhen ZHAO   +7 more
doaj   +2 more sources