动力扰动下轴向应力对深部巷道破坏特征影响研究  

Influence of Axial Stress on the Failure Characteristics of Deep Roadway Under Dynamic Disturbance

作　　者：李占金 杨思浩 李群 梁锐 刘紫琼 胡子浩 LI Zhanjin;YANG Sihao;LI Qun;LIANG Rui;LIU Ziqiong;HU Zihao(College of Mining Engineering,North China University of Science and Technology,Tangshan,Hebei 063210,China;Mine Green Intelligent Mining Technology Innovation Center of Hebei Province,Tangshan,Hebei 063210,China)

机构地区：[1]华北理工大学矿业工程学院,河北唐山市063210 [2]河北省矿山绿色智能开采技术创新中心,河北唐山市063210

出　　处：《矿业研究与开发》2025年第3期10-16,共7页Mining Research and Development

基　　金：河北省自然科学基金资助项目(E2021209131,E2024209024);河北省高等学校科学技术研究项目(QN2021111)。

摘　　要：为研究深部岩石巷道岩爆现象,采用真三轴岩爆试验机对含预制直墙半圆拱形巷道在不同轴向应力下受循环动力扰动作用诱发岩爆现象进行研究,并利用声发射技术监测巷道破坏过程。通过岩爆试验发现,初始轴向静应力越大,岩石劣化程度越高,岩爆所需扰动时间越短,试样累积能量速率越快,岩石岩爆越剧烈。结果表明:当轴向应力超过岩石巷道峰值应力的76.5%时,试件施加循环动力扰动后会发生岩爆现象;岩石巷道的破坏模式为张拉-剪切联合破坏,且裂纹扩展的破坏模式与轴向应力和动力扰动密切相关;利用声发射累计振铃计数描述岩石劣化程度,发现在动力扰动下岩石的劣化程度与初始轴向静应力呈正相关。To study the phenomenon of rock burst in deep rock roadway,the true triaxial rock burst test machine was used to study the phenomenon of rock burst induced by cyclic dynamic disturbance under different axial stresses in semi-circular arch roadway with prefabricated straight wall,and the acoustic emission technology was used to monitor the failure process of roadway.Through the rock burst test,it is found that the greater the initial axial static stress,the higher the degree of rock deterioration,the shorter the disturbance time required for rock burst,the faster the cumulative energy rate of the sample,and the more severe the rock burst.The results show that when the axial stress exceeds 76.5%of the peak stress of the rock roadway,the rock burst will occur after the cyclic dynamic disturbance is applied to the specimen.The failure mode of rock roadway is tension-shear combined failure,and the failure mode of crack propagation is closely related to axial stress and dynamic disturbance.Acoustic emission cumulative ringing count is used to describe the degree of rock deterioration,and it is found that the degree of rock deterioration under dynamic disturbance is positively correlated with the initial axial static stress.

关 键 词：轴向应力 动力扰动 破坏模式 损伤变量 

分 类 号：TD324[矿业工程—矿井建设]