煤层巷道蝶型冲击地压发生机理猜想  

Mechanism conjecture of butterfly rock burst in coal seam roadway

作　　者：赵志强[1] 马念杰[1] 郭晓菲[1] 赵希栋 夏永学[2] 马振凯[2] ZHAO Zhi-qiang MA Nian-jie GUO Xiao-fei ZHAO Xi-dong XIA Yong-xue MA Zhen-kai(Faculty of Resource and Safety Engineering, China University of Mining and Technology （Beifing）, Beijing 100083, China Department of Coal Mining ＆ Designing, Tiandi Science ＆ Technology Co. , Ltd. ,Beijing 100013, 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 [2]天地科技股份有限公司开采设计事业部,北京100013

出　　处：《煤炭学报》2016年第11期2689-2697,共9页Journal of China Coal Society

基　　金：国家自然科学基金重点项目(51434006;51234005)

摘　　要：根据巷道围岩蝶形塑性区理论,分析了巷道围岩蝶形塑性区蝶叶瞬时急剧扩展的突变特征,提出了煤层巷道蝶型冲击地压发生机理猜想,认为煤巷冲击地压是由于巷道围岩蝶形塑性区的蝶叶瞬时爆炸式扩展引起的,阐明了该类型冲击地压形成、演化及发生的力学本质和物理过程。提出了蝶叶突变型冲击地压发生的必要与充分条件,建立了煤层巷道冲击地压判定准则,合理解释了巷道顶板冲击、底板冲击、煤帮冲击等不同类型的冲击地压发生机理。该猜想能够预见巷道冲击地压发生时必然产生至少1个、最多4个巨大的蝶叶塑性区的未知现象,可以获得煤巷冲击地压危险性评价和预测的关键指标和可测参量。According to theory of butterfly-shaped plastic zone around roadway in host rockmass,the instantaneously extend mutation characteristics of butterfly-shaped plastic zone were analyzed,a mechanism conjecture of butterfly-mutation rockburst in coal seam roadway was then developed. The presented conjecture considered an instantaneously exploration mutation characteristics of butterfly-shaped plastic zone as the main potential cause of roadway rockburst.Further,mechanics essence and physics process of the formation,evolution and occurrence of rockburst were explained. Necessary and sufficient conditions of rockburst were proposed and criterion of roadway rockburst was built. In this fashion,mechanisms of different types of roadway rockburst（ roof burst,floor burst,rib burst,etc.） can be explained properly. This ＂conjecture＂had the capacity of predicting the unknown phenomenon,which normally associates with from,at least,1 to 4 huge butterfly-shaped plastic zones inevitably occured under a roadway rockburst. In addtion,this ＂conjecture＂could acquire critical index and measurable parameters for risk assessment and prediction.

关 键 词：煤巷 冲击地压 塑性区 蝶形 突变 

分 类 号：TD324[矿业工程—矿井建设]