采矿工程
支柱
发掘
变形(气象学)
地质学
煤矿开采
面子(社会学概念)
煤
流离失所(心理学)
岩土工程
工程类
结构工程
地理
考古
社会科学
海洋学
社会学
心理学
心理治疗师
作者
Qing-Long Yun,Xiaohe Wang,Jing Wu,Wenbo Zhang,Xiao-Xiang Wei,Jiang-Hao Wang
标识
DOI:10.1038/s41598-024-63246-x
摘要
Abstract This study investigates the deformation and damage characteristics of the surrounding rock along the top return mining roadway of an isolated island working face at different stages and reveals its damage mechanism and evolution law. Utilizing a mine in Yangquan City, Shanxi Province, China, as the engineering background, this research employs FLAC 3D numerical simulation and on-site measurements. The findings suggest that the evolution of the plastic zone along the top roadway of the 15,106 island face is largely similar during both the excavation and mining periods. The plastic zones on either side of the roadway are expanding asymmetrically and gradually merging into the plastic zone of the coal pillar. In the destructive stage, the sub-gangs of the roadway are penetrated, indicating the progression into the plastic zone. The investigation points to extensive damage on the larger side of the roadway, the development of fissures, and the significant depth of damage as primary causes of roadway deformation. Moreover, the extent of the plastic zones on both sides of the roadway correlates positively with their relative distance. Continuous monitoring reveals an ongoing increase in roadway displacement, consistent with general observations in coal mining. The results provide valuable insights for optimizing support structures in similar mining environments.
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