均质圆形巷道蝶型冲击地压发生机理及其判定准则  

Occurrence mechanisms and judging criterion on circular tunnel butterfly rock burst in homogeneous medium

作　　者：马念杰[1] 郭晓菲[1] 赵志强[1] 赵希栋 刘洪涛[1] MA Nian-jie GUO Xiao-fei ZHAO Zhi-qiang ZHAO Xi-dong LIU Hong-tao(Faculty of Resource and Safety Engineering, China University of Mining and Technology （ Beijing）, Beijing 100083, China)

机构地区：[1]中国矿业大学(北京)资源与安全工程学院,北京100083

出　　处：《煤炭学报》2016年第11期2679-2688,共10页Journal of China Coal Society

基　　金：国家自然科学基金重点资助项目(51234006;51434005)

摘　　要：从均质圆形巷道围岩塑性破坏区的产生、发展和爆炸式破坏的力学机制入手,揭示了巷道蝶型冲击地压的发生机理:在一定的应力和围岩环境中,由于触发事件的诱导作用,使巷道区域应力场突然发生某种改变,导致围岩蝶形塑性区瞬间出现急剧、跳跃式扩展,并以震动、声响和煤岩体抛出的形式释放存储于体内和围岩系统中的大量弹性能,出现爆炸式破坏的动力现象。巷道蝶型冲击地压理论阐明了冲击地压的发生条件,给出了"蝶型冲击三准则",为巷道冲击地压的预测、预报及其防治提供了新的思路。Starting from the mechanical mechanism of the formation,development and explosive destruction of the plastic failure zone in the surrounding rock of the circular tunnel under the homogeneous condition,the occurrence mechanism of rock burst in the tunnel is revealed. In a certain stress and surrounding rock environment,due to the induction of the triggering event,the stress field of the roadway will be suddenly changed,and the butterfly-shaped plastic zone in the ground will expand sharply and jumpily,then a huge amount of elastic energy which is gathered in the body of coal or in the system of surrounding rock will be suddenly released in the form of vibration,sound and coal or rock mass burst. The occurrence condition of rock burst is explained by the theory of butterfly rock burst in the tunnel. Besides,the three butterfly rock burst criterions are given,which provides a new idea for the forecasting,prediction and prevention of rock burst.

关 键 词：巷道 冲击地压 蝶形 塑性区 

分 类 号：TD324[矿业工程—矿井建设]