【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.更多还原

【Abstract】 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.更多还原