Similar simulation study on the deformation and failure of surrounding rock of a large section chamber group under dynamic loading

• 作者: Xuesheng Liu Shilin Song Yunliang Tan Deyuan Fan Jianguo Ning Xuebin Li Yanchun Yin
• 来源期刊: 矿业科学技术学报（英文版）
• 年，卷（期）: 2021,（3）
• 页码范围: 495-505
• 页数: 11页
• 语种: 英文
• DOI: 10.3969/j.issn.2095-2686.2021.03.015

摘要

Large and super-large section chamber groups in coal mines are frequently affected by dynamic loads resulting from production activities such as roadway driving and blasting. The stability of the surround-ing rock is poor, and it is difficult to control. In this paper, a similar simulation test was used to study the deformation and evolution laws of the surrounding rock of a triangle-shaped chamber group under dif-ferent dynamic loads. The results showed that under dynamic loading, the vertical stress of the surround-ing rock of the chamber group increased in an oscillatory form. The maximum stress concentration coefficient reached 4.09. The damage degree of the roof was greater than that of the two sides. The defor-mation of the roof was approximately 1.2 times that of the two sides. For the chamber closer to the power source, the stress oscillation amplitude of the surrounding rock was larger, and the failure was more seri-ous. The force of the anchorage structure showed a phased increasing characteristic; additionally, the force of the anchorage structure on the adjacent side of the chambers was greater than that on the other side. This study reveals the deformation and failure evolution laws of the surrounding rock of large sec-tion chamber groups under dynamic loading.