Study on mechanical mechanism and criterion of roadway rockburst induced by mine earthquake

被引：0

作者：

Zhu X. ^{[1
,2
,3
]}

Pan Y. ^{[2
]}

Qi Q. ^{[1
,3
]}

Xiao Y. ^{[2
]}

Li H. ^{[1
,3
]}

机构：

[1] Deep Mining and Rockburst Research Institute, CCTEG Chinese Institute of Coal Science, Beijing

[2] School of Physics, Liaoning University, Liaoning, Shenyang

[3] National Key Laboratory of Intelligent Coal Mining and Rock Formation Control, Beijing

来源：

Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | 2024年 / 41卷 / 03期

关键词：

energy in critical softening zone; mine seismic waves energy at outer boundary of softening zone; roadway rapid shrinkage displacement; rockburst; uniform energy index;

D O I：

10.13545/j.cnki.jmse.2023.0139

中图分类号：

学科分类号：

摘要：

Aiming at the problems of unclear mechanism and insufficient theoretical research of roadway rockburst induced by mine earthquake, an elastic-plastic softening mechanical model of roadway is established, and the softening zone energy extremum criterion of roadway rockburst induced by mine earthquake is put forward, based on the softening zone energy and mine seismic waves energy. The ratio of mine seismic waves energy at outer boundary of softening zone to energy in critical softening zone is defined as the uniform energy index, which is used to judge whether mine earthquake is capable of inducing roadway rockburst. When the uniform energy index is less than or equal to 1, it is deficient to push the coal of softening zone into roadway, which leads to roadway rockburst. When the uniform energy index is larger than 1, there is tremendous energy to force the coal of softening zone to rush into roadway. Its rockburst is induced by mine earthquake at the same time. When rockburst occurs, the degree of rockburst damage is characterized by the roadway rapid shrinkage displacement. The roadway rapid shrinkage displacement decreases exponentially with the energy in critical softening zone of roadway surrounding rock, and increases linearly with seismic waves energy at outer boundary of softening zone. Theoretical analysis is verified by numerical simulation and similarity simulation test. © 2024 China University of Mining and Technology. All rights reserved.

引用

页码：493 / 503

页数：10

共 30 条

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