巨厚火成岩诱发冲击矿压的原因与防治技术  

Reasons and Prevention Measures for Rock Burst Caused by Extremely Thick Igneous Rock

作　　者：胡敏军[1,2] 王连国[1,2] 朱双双[1,2] 孙小康[1,2] 张光辉[1,2] 

机构地区：[1]中国矿业大学力学与建筑工程学院,江苏徐州市221116 [2]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州市221008

出　　处：《矿业研究与开发》2013年第6期54-57,共4页Mining Research and Development

基　　金：国家重点基础研究发展计划(973)项目(2010CB226805);国家自然科学基金项目(50834004)

摘　　要：针对海孜矿1026运输巷发生冲击矿压的工程背景,基于关键层理论,采用FLAC3D数值模拟,分析巨厚火成岩作用下工作面周围支承压力的变化规律,从采动应力集中的大小和影响范围解释发生冲击矿压的原因。研究结果表明:已采1024工作面帮部残余支承压力和现采1026工作面超前支承压力形成叠加,叠加后的应力大小和影响范围显著增加,应力影响范围到达了1026运输巷所在的位置,从而诱发了冲击矿压的发生。根据研究结果,采用监测与防治相结合的办法,先监测出煤岩体的冲击性,然后钻孔释放煤体中积聚的弹性能,消除应力升高区,从而减小煤层发生冲击灾害的几率。According to tile engineering background of rock burst occurring in 1026 haulage roadway of Haizi mine, based on the critical layer theory, this paper analyzed the change law of the supporting pressure on working face caused by extremely thick igneous rock with FLAC3D, then explained the reasons for rock burst from the respective of the size and scope of mining-induced stress concentration. The results showed that, the residual bearing pressure from the sideways 1024 excavated working face and the lead pres-sure from 1026 excavating working face overlapped, which resulted in a significant increase in stress magnitude and scope. The scope of stress reached the location of the 1026 haulage roadway, leading to the occurrence of rock burst. According to the results, we can combine monitoring with prevention to monitor the impact of Coal-rock firstly , then drill to release the accumulated elastic energy accumulated in the Coal seams, so that the area with rising stress will be re- lieved and the ehanee of mine rock burst will he reduced.

关 键 词：巨厚火成岩 支承压力 冲击矿压 电磁辐射监测仪 钻孔泄压 

分 类 号：TD823.86[矿业工程—煤矿开采]