深部圆形巷道冲击破坏特征试验研究  

Experimental study on impact failure characteristics of deep circular roadway

作　　者：彭守建[1] 杨燕[1] 许江[1] 许庆峰 秦朝龙 农晓莉 PENG Shoujian;YANG Yan;XU Jiang;XU Qingfeng;QIN Chaolong;NONG Xiaoli(State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学煤矿灾害动力学与控制全国重点实验室,重庆400044

出　　处：《煤矿安全》2025年第1期107-116,共10页Safety in Coal Mines

基　　金：国家自然科学基金面上资助项目(52274174,51974041);中央高校基本科研业务费资助项目(2022CDJQY-011)。

摘　　要：为研究深部圆形巷道在扰动荷载条件下的冲击破坏特征,基于自主研发的冲击地压多功能物理模拟试验系统,针对大尺度类岩石材料开展圆形巷道冲击破坏试验,模拟地下800 m巷道受到开采扰动时的冲击破坏过程,分析了深部圆形巷道发生冲击破坏的应力应变、爆坑、声发射和红外辐射响应特征。结果表明:深部圆形巷道冲击破坏过程分为平静期、颗粒弹射期、块状剥落期、全面破坏期4个阶段;巷道破坏后两侧均形成“V”形爆坑,右侧爆坑的面积大于左侧,破坏程度高于左侧;巷道开始产生颗粒弹射时进入初始破坏阶段,声发射计数和能量缓慢增加,红外辐射温度场均匀分布,分异程度较低;随着扰动应力的增加,声发射计数和能量逐渐增大,红外辐射温度场出现升温并形成高温集中区域,温度场分异现象明显;临近全面破坏时声发射计数和能量突增,红外辐射温度场分异程度达到最大后降低,低温区域温度场整体温度升高。In order to study the impact failure characteristics of deep circular roadway under the condition of disturbance load,based on the self-developed multi-functional physical simulation test system of rock burst,the impact failure test of circular roadway was carried out for large-scale rock-like materials.The impact failure process of underground 800 m roadway under mining disturbance was simulated,and the stress-strain,blasting,acoustic emission and infrared radiation response characteristics of impact failure of deep circular roadway were analyzed.The results show that the impact failure process of deep circular roadway is divided into four stages:quiet period,particle ejection period,block spalling period and comprehensive failure period.After the failure of the roadway,“V”shaped blasting pits are formed on both sides.The area of the right blasting pit is larger than that of the left,and the degree of damage is higher than that of the left.When the roadway began to produce particle ejection,it entered the initial failure stage,the acoustic emission count and energy increased slowly,the temperature of the infrared radiation temperature field was evenly distributed,and the degree of differentiation was low.With the increase of disturbance stress,the energy of acoustic emission count increases gradually,the temperature field of infrared radiation rises and forms a high temperature concentration area,and the temperature field differentiation is obvious.The acoustic emission count and energy increase suddenly near comprehensive damage,the degree of infrared radiation temperature field differentiation reaches the maximum and then decreases,and the overall temperature of the temperature field in the low temperature region increases.

关 键 词：深部巷道 冲击破坏 冲击倾向性 声发射 红外辐射 

分 类 号：TD324.1[矿业工程—矿井建设]