高应力条件下深部巷道受循环扰动诱发岩爆特征试验研究  

Experimental Study on Rock Burst Characteristics Induced by Cyclic Disturbance in Deep Tunnels Under High-Stress Conditions

作　　者：李占金 刘紫琼 李群 梁锐 杨思浩 胡子浩 LI Zhanjin;LIU Ziqiong;LI Qun;LIANG Rui;YANG Sihao;HU Zihao(School of Mining Engineering,North China University of Science and Technology,Tangshan,Hebei o63210,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1期1-8,共8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资助项目(QN2021111)。

摘　　要：深部工程爆破开挖等扰动容易诱发岩爆。为研究不同应力条件下深部巷道受循环扰动诱发岩爆的条件及岩爆特征,利用含直墙半圆拱形贯穿巷道的花岗岩试件开展真三轴扰动岩爆试验,分析深部工程岩爆的发生条件、岩爆特征、声发射演变过程以及岩石内部能量演化特征。试验结果表明:扰动幅值大于10 MPa时试件会发生岩爆,扰动幅值每增加10 MPa,从开始扰动加载到试件发生岩爆破坏的时间就相应减少30%左右,扰动幅值越大试件破坏越剧烈,岩石表面产生的剪切裂纹越多;循环扰动对剪切裂纹的产生与扩展起到显著的促进作用,扰动不仅增加了剪切裂纹的数量,还加速了裂纹的扩展速度;试件内部积聚的弹性应变能随扰动幅值的增大而提高,当试件发生破坏时,这些积聚的能量会迅速释放,导致试件破坏更加剧烈。The disturbance such as deep engineering blasting and excavation is prone to induce rock burst.To study the conditions and characteristics of rock burst induced by cyclic disturbance in deep tunnels under different stress conditions,granite specimens with semi-circular arches penetrating the tunnel were used to conduct true triaxial disturbance rockburst tests.The occurrence conditions,characteristics of rock burst in deep engineering,the evolution process of acoustic emission,and the energy evolution characteristics inside the rock were analyzed.The test results are concluded as follows.Firstly,when the disturbance amplitude exceeds 10 MPa,rock burst will occur in the specimen.For every additional 10 MPa of disturbance amplitude,the time from the start of disturbance loading to the occurrence of rock burst in the specimen is reduced by about 30%.The greater the disturbance amplitude,the more severe the damage to the specimen,and the more shear cracks on the rock surface.Secondly,cyclic disturbance significantly promotes the generation and extension of shear cracks.The disturbance not only increases the number of shear cracks but also accelerates the speed of crack propagation.Thirdly,the accumulated elastic strain energy inside the specimen increases with the increase of disturbance amplitude.When the specimen fails,these accumulated energies are rapidly released,leading to more severe failure of the specimen.

关 键 词：深部巷道 循环扰动 扰动幅值 岩爆 弹性应变能量 

分 类 号：TD324[矿业工程—矿井建设]