Results 1 to 10 of about 934 (182)

Research on location optimization and application of the gob-side entry retaining by roof cutting in close-distance coal seams [PDF]

Scientific Reports
Compared to traditional long-wall mining, the gob-side entry retaining by roof-cutting (GERRC) technology reduces the amount of entry excavation by 50%, and recovers the previously wasted coal pillar resources, which has obvious superiority in mining ...
Qiang Fu, Jun Yang, Yuxuan Liu, Chuanjiu Zhang, Yubing Gao, Hainan Gao, Qing Ma   +6 more
doaj   +3 more sources

Study on the failure law of overlying rock under coal seam in close distance coal seam and feasibility discrimination of upward mining [PDF]

Scientific Reports
Upward mining of close-distance coal seams is technically challenging due to the complex nature of overburden failure and the potential hazards associated with water and gas.
Yanping Miao
doaj   +4 more sources

Roof breaking characteristics and mining pressure APPEARANCE laws in close distance COAL seams

Energy Exploration & Exploitation, 2023
In order to obtain lower coal seam mining of roof breaking characteristic and the law of mine pressure appearance in the close distance coal seams, this paper takes working face 6101 of a mine as the engineering background, and studies the roof breaking ...
Xuping Li, Yanqing Liu, Xiaopeng Ren, Xiangye Wu, Chenhong Zhou   +4 more
doaj   +3 more sources

Research on the failure law and actual measurement of floor in extremely close distance thick coal seam mining [PDF]

Scientific Reports
The vigorous mining of domestic coal resources is accompanied by the complexity and diversification of the conditions of coal seams. Multi seam and close distance coal seam mining have become normalized.
Yupei Deng, Weidong Pan, Chao Ma, Shiqi Liu, Zhining Zhao, Cang Deng, Meng Li   +6 more
doaj   +5 more sources

Prediction correction modeling of water-conducting fracture zones height due to repeated mining in close distance coal seams [PDF]

Scientific Reports
The height of the water-conducting fracture zones (WCFZ) is crucial for ensuring safe coal mining beneath aquifers, particularly considering the secondary development of the WCFZ in upper seams due to repeated mining in close distance coal seams ...
Zhuoran Kang, Daming Yang, Pengfei Shen
doaj   +3 more sources

Stability control of gob-side entry retained under the gob with close distance coal seams

International Journal of Mining Science and Technology, 2021
In multi-seam mining, the interlayer rock strata between the upper coal seam (UCS) and the lower coal seam (LCS) appear damage and strength weakening after mining the UCS.
Zizheng Zhang, Min Deng, Jianbiao Bai, Shuai Yan, Xianyang Yu   +4 more
doaj   +4 more sources

Field and numerical investigations of gateroad system failure under an irregular residual coal pillar in close‐distance coal seams [PDF]

Energy Science & Engineering, 2019
The Gaojialiang Coal Mine in Inner Mongolia in China was used as an example to investigate the process of chain pillar and gateroad failure in the lower coal seam under the effect of an irregular residual coal pillar in the upper close‐distance coal seam.
Hefu Shang, Jianguo Ning, Shanchao Hu, Shang Yang, Pengqi Qiu   +4 more
doaj   +3 more sources

Non-uniform failure and differential pressure relief technology of roadway under irregular goafs in deep close-distance coal seams [PDF]

Scientific Reports, 2023
In response to the control problems of large-deformation roadways in close-distance coal seams, taking a typical roadway under irregular goafs and residual coal pillar in deep close-distance coal seams as the background, the characteristics of mine ...
Shuaifeng Yin, Xinjian Zheng, En Wang, Qingtao Kang, Xiaoming Zhang   +4 more
doaj   +2 more sources

Study on the Law of Fracture Evolution under Repeated Mining of Close-Distance Coal Seams [PDF]

Energies, 2020
The western region of China is rich in mineral resources. The vigorous development of mineral resources has exacerbated the environmental and safety problems in the region. One of the important links to solve this problem is to control the development laws and distribution characteristics of the overburdened cracks in the mining of this area.
Chong Jia, Jia Chong, Cui Feng
exaly   +3 more sources

Study on the Coal Pillar Weakening Technology in Close Distance Multi-Coal Seam Goaf

Energies, 2022
The pressure relief of coal pillars in close-distance multi-coal seam goaf is a complex engineering problem with the characteristics of “dynamic mine pressure”. Hence, this paper studies such problems.
Jie Zhang, Qingsong Zhuo, Sen Yang, Tao Yang, Bin Wang, Wenyong Bai, Jianjun Wu, Shaoliang Xie   +7 more
doaj   +2 more sources