矿山井巷和采场冲击地压危险性的弹性能判据  

Elastic energy criterion of rock burst in roadway and coalface of mine

作　　者：孙振武[1] 代进[1] 杨春苗[1] 杨建飞[1] 

机构地区：[1]山东科技大学矿山灾害预防控制省部共建教育部重点实验室,山东青岛266510

出　　处：《煤炭学报》2007年第8期794-798,共5页Journal of China Coal Society

基　　金：国家自然科学基金重点资助项目(50534080);国家自然科学基金资助项目(50674063);山东省教育厅科技计划资助项目(J06N04);山东省博士后科研项目择优资助项目(200603025)

摘　　要：探讨了处于弹塑性变形状态下井巷和采场围岩体弹性比能的计算方法,提出了用有限元法分析计算处于弹塑性变形状态受力煤岩体的弹性比能分布的理论与方法,以及产生冲击地压的弹性能判据.针对鲁村煤矿2217区段运输平巷的具体条件,进行了有限元计算分析,结果发现,巷道围岩中的弹性能主要储存于两帮煤壁中,煤壁中部煤体的弹性比能超过了产生动力破坏所需最小比能,顶、底板中储存的弹性能较少.计算表明,该巷道围岩不满足产生冲击地压的条件,与现场实际情况相吻合.The calculation method of the elastic specific energy in elasto-plastic state of surrounding rock of roadway and coalface was discussed, and the theory and the method, which can be used to calculate the distribution of the elastic specific energy of the load-bearing rock and coal mass in elasto-plastic state using the finite element method, were brought forward. An elastic energy criterion of rock burst was obtained. According to the numerical analysis on Lucun coal mine＇ s 2217 haulageway, it is indicated that the elastic energy is deposited mainly in the sides coal mass, and the elastic energy, which stored in center section of coal wall, exceeds the least specific energy of dynamical failure of rock mass. However, the elastic energy is much less in the roof and floor. The study results indicate that rock burst can not occur in this haulageway, which are well agreeable with the practice at site .

关 键 词：冲击地压 弹性能 弹性能判据 有限元法 

分 类 号：TD823.86[矿业工程—煤矿开采]