深部开采沿空巷道冲击危险性的工程判据  

Engineering criterion of gob-side entry rock burst hazard in deep mining

作　　者：姜福兴[1] 王建超[1] 孙广京 朱斯陶 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]山东新巨龙能源有限责任公司,山东菏泽274918

出　　处：《煤炭学报》2015年第8期1729-1736,共8页Journal of China Coal Society

基　　金：国家重点基础研究发展计划(973)资助项目(2010CB226803);国家自然科学基金资助项目(51274022;51174016)

摘　　要：为研究深部开采沿空巷道冲击地压的发生条件,以沿空巷道应力场分布为切入点,建立了相应的工程力学模型,分析得到沿空巷道围岩高应力区附近的高应力差区是发生冲击地压的主要区域。以高应力差区的煤体为研究对象,分析得到了沿空巷道冲击地压发生的应力条件、应力梯度条件及煤体的冲击倾向性条件,并推导了冲击危险性的工程判据。结果表明:决定冲击地压危险性的关键因素是高应力差区域的应力峰值、应力差值、应力梯度和煤岩体强度以及冲击倾向性;通过调整沿空巷道实体煤巷帮与高应力峰值位置的间距,合理布置沿空巷道位置,可以有效控制沿空巷道的冲击地压灾害。In order to study the occurrence conditions of rock burst in gob-side entry in deep mining,the stress field distribution of gob-side entry was taken as entry point,and the corresponding engineering mechanical models were established. After analysis,the high stress difference region near the high stress region in the surrounding rock of gobside entry is the main region of rock burst. Taking the coal of the high stress difference region as study object,the stress condition,stress gradient condition and bursting liability condition of rock burst occurrence in gob-side entry were gained by mechanical analysis,and the engineering criterion of rock burst hazard was deduced. The results show that the key factors of rock burst hazard are the stress maximum,the stress difference,the stress gradient,the strength and bursting liability of coal in the high stress difference region. And rock burst disaster of gob-side entry can be controlled effectively by determining the reasonable position of gob-side entry to adjust the spacing between substance coal roadway side of gob-side entry and stress peak of the high stress region.

关 键 词：深部开采 沿空巷道 冲击地压 工程判据 

分 类 号：TD324[矿业工程—矿井建设]