葛亭煤矿断层活化导水数值模拟研究  

Numerical Simulation Study on Water Conduction Caused by Fault Activation in Geting Mine

作　　者：张玉东[1,2] 许进鹏[2,3] 

机构地区：[1]中煤科工集团重庆研究院,重庆400039 [2]中国矿业大学资源学院,江苏徐州221116 [3]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221116

出　　处：《矿业安全与环保》2013年第2期16-19,共4页Mining Safety & Environmental Protection

摘　　要：针对不导水断层在采动条件下发生活化导水的现象,根据裂隙介质水动力学和弹性力学理论进行分析,当断层原始导升带附近水压大于裂隙法向应力时,原本闭合的裂隙张开,或者被充填物充填的裂隙张开度变大,从而使充填物被水冲走,断层导水性增强,直至突水。应用离散元软件UDEC建立了3种断层活化模型,结合现场注水试验和工作面实际开采情况进行研究,结果表明:断层原始导升带附近水压大于裂隙(主要指与围岩最小主应力方向垂直的裂隙)法向应力是断层活化导水的必要非充分条件。To counter the water conduction phenomenon which occurred in the water in-conductive fault due to the activation of such fault under the mining condition and based on the theoretical analysis on fracture media with dynamics and elasticity,the authors considered that when the water pressure in the original water conductive zone near the fault is higher than normal stress of fractures,the closed fractures is open or the opening width of the fault which was filled up by filling materials become greater,this thus caused the filling materials to be washed away,the water conductivity of the fault to be increased and finally the water inrush to occur.Three kinds of fault activation models were built by using distinct element software UDEC and study was carried out according to the site water infusion test and the actual mining situation.The results showed that the water pressure in the original water conductive zone near the fault which was higher than normal stress of fractures（mainly refers to those fractures vertical to the minimum principal stress direction of the surrounding rock） was a prerequisite but not sufficient condition for water conduction by fault activation.

关 键 词：断层活化 突水 离散元 数值模拟 

分 类 号：TD745[矿业工程—矿井通风与安全]