巷道围岩连锁冲击破坏机理及稳定控制方法研究  

Study on Failure Mechanism and Stability Control Method of Chain Impact of Roadway SurroundingRock

作　　者：李皎 刘阳[2] 刘心强 张崟峰 静涛 蒋帅 LI Jiao;LIU Yang;LIU Xinqiang;ZHANG Yinfeng;JING Tao;JIANG Shuai(Shandong Yineng Coal Mine Co.,Ltd.,Jining 272350,China;School of Mining Engineering,State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology,Xuzhou 221008,China;Xuzhou Dayueer Technology Co.,Ltd.,Xuzhou 221008,China)

机构地区：[1]山东义能煤矿有限公司,山东济宁272350 [2]中国矿业大学煤炭资源与安全开采国家重点实验室,矿业工程学院,江苏徐州221008 [3]徐州大月尔科技有限公司,江苏徐州221008

出　　处：《煤炭技术》2024年第1期24-29,共6页Coal Technology

基　　金：国家重点研发计划(2020YFB1314203,2020YFB1314204);国家自然科学基金项目(51504248;51404269)。

摘　　要：利用虚拟交界面将巷道围岩整体结构分成若干岩体单元和弹性单元,建立巷道围岩连锁冲击破坏理论及其力学结构模型,分析了不同静载、动载组合巷道围岩连锁破坏形式,建立了连锁破坏的力学方程和能量方程,揭示了巷道围岩储能结构、阻力结构在冲击启动和破坏过程中的作用和影响机制。研究表明,冲击地压是动力扰动诱发煤岩体内部弹性能突然释放的结果,其中煤岩体储能结构是冲击破坏的内因和动力源泉,动载诱发局部岩体破坏和能量连续释放;煤岩体冲击破坏时,其整体结构转变为向巷道自由空间运动的多滑块(岩体单元)结构,各滑块间存在相对运动、挤压以及弹性单元触发产生的冲击力,使各岩体单元的速度和加速度均处在动态变化当中;巷道围岩防冲控制的有效思路是调整巷道围岩整体结构,合理分布储能结构和冲击阻力结构,主动破坏能量持续解锁所需的弹性单元,使巷道周边围岩由储能结构转变为阻力结构区域。The chain damage theory and it's mechanics model of surrounding rock were established by using virtual interfaces to divide surrounding rock into a number of rock units and elastic units.Then the chain damage of surrounding rock under different combination of static load and dynamic load was analyzed,and the role and influence mechanism of energy storage structure and resistance structure of surrounding rock were also discussed by developing the mechanics equation and energy equation in this model.The result shows that rock burst is a sudden release process of elastic energy in surrounding rock,and energy storage in coal and rock structure is the internal cause and the power source of rock burst,and dynamic load causes local damage and energy release in the coal and rock structure.When rock burst happens,the whole structure develops into a number of sliders(rock units),and there are relative motion,extrusion and the impact induced by the elastic energy release among the sliders,which make the speed and acceleration of rock units are both in dynamic status.Based on the theory of chain damage,the idea of roadway surrounding rock control and supporting were put forward.This includes adjusting the overall structure of surrounding rock with reasonable distribution of energy storage structure and resistance structure,and actively damaging the elastic units in surrounding rock for forming resistance structure in roadway periphery.

关 键 词：煤矿 冲击地压 巷道 连锁 围岩控制 

分 类 号：TD324[矿业工程—矿井建设]