Results 1 to 10 of about 140,971 (281)

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

Sensors, 2022
To control the problem of coal wall spalling in large mining height working faces subject to mining, considering the Duanwang Mine 150505 fully mechanized working face, the mechanism of coal wall spalling in working faces was investigated by theoretical ...
Hongtao Liu, Yang Chen, Zijun Han, Qinyu Liu, Zilong Luo, Wencong Cheng, Hongkai Zhang, Shizhu Qiu, Haozhu Wang   +8 more
doaj   +6 more sources

Research on the Mechanism and Control Technology of Coal Wall Sloughing in the Ultra-Large Mining Height Working Face. [PDF]

Int J Environ Res Public Health, 2023
One of the primary factors affecting safe and effective mining in fully mechanized mining faces with large mining heights is coal wall sloughing. This paper establishes the mechanical model of the coal wall and uses the deflection theory for the mechanics of materials to find the maximum point of the deflection of the coal wall, which is the most ...
Li X, Zhang X, Shen W, Zeng Q, Chen P, Qin Q, Li Z.   +6 more
europepmc   +5 more sources

Research on Overburden Movement Characteristics of Large Mining Height Working Face in Shallow Buried Thin Bedrock [PDF]

Energies, 2019
The overburden movement of the large mining height working face of shallow buried thin bedrock (SBTB) is a complex engineering problem with “time-space-intension”, which is of great significance to realize efficient and safe mining in the ...
Qingxiang Huang, Yanpeng He
doaj   +7 more sources

Floor Disturbance and Failure Characteristics of Super-Large Mining Height Working Face

Geofluids, 2022
The failure depth of the working face floor caused by mining is a key parameter to predict water inrush from the working face floor. Extensive research has been conducted on the floor failure zone of the working face. However, in recent years, there have
Cunjin Lu, Jinpeng Xu, Hui Zhao, Heng Zhang, Yian Zhang, Mingyue Chen   +5 more
doaj   +2 more sources

Research on Surface Failure Law of Working Faces in Large Mining Height and Shallow Buried Coal Seam [PDF]

Advances in Civil Engineering, 2020
In the process of high-intensity and large-space mining in Shendong mining area, various surface cracks are generated on the surface, resulting in serious damage to the surface buildings and the local ecological environment.
Zhenhua Li, Yingkun Pang, Yongsheng Bao, Zhanyuan Ma   +3 more
doaj   +2 more sources

Research on Technology of Supporting in Super-Large Section Cut in Working Face with Large Mining Height [PDF]

Advances in Civil Engineering, 2021
For the support problem of the super-large section cut in working face with large mining height, the 1105 cut pilot chamber of Zhaogu No. 2 Mine, the roof strata structure detection and the strata movement rule research were conducted.
Zhicheng Ren, Minghui Zuo
doaj   +2 more sources

Surrounding rock control technology of 10 m super large mining height working face in Caojiatan Coal Mine

Meitan xuebao
The 10 m ultra-large mining height of Caojiatan Coal Mine is a world’s first in terms of single mining height and mining intensity, and the effective control of surrounding rock in the stope is crucial for safe and efficient mining at the working face ...
Rui WANG, Gang XU, Hongpu KANG, Zhen ZHANG, Yajun LEI, Yanjun FENG, Ying MA, Zhizeng HUANG, Qianjin LIU, Xiaogang LIU, Xingyu LIN, Rongshan MA, Zhen ZHAO, Zhengjie LI   +13 more
doaj   +2 more sources

Research on key technologies of intelligent fully mechanized mining on working face with large mining height

Gong-kuang zidonghua, 2018
In order to solve problems of large number of workers and high labor intensity on fully mechanized mining face with large mining height, according to actual situation of No.2 Coal Mine of Huangling Mining Group Co., Ltd., technical difficulties such as ...
FAN Jingdao
doaj   +2 more sources

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.
Zhaoyuan LEI, Maoping ZHAO, Tuanjie LI, Feng LI, Lei LI   +4 more
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