【摘要】 通过对口泉断裂的几何学、运动学和动力学的分析,确定了口泉断裂的活动特征和应力状态。在此基础上利用FLAC3D数值计算方法分析了口泉断裂两侧地块煤岩体的构造应力空间分布特征,并与同忻井田强矿压显现特征进行了对比分析。研究表明:口泉断裂在区域构造应力作用下活动性更强,更容易发生失稳;同忻井田位于口泉断裂活动性最强的中段,围岩及煤层中存在不均匀的、较高的构造应力,聚集了相对较高的弹性能量,决定了矿山压力显现的区域性分布。口泉断裂是同忻井田产生强矿压显现的地质动力因素,对井田矿压显现具有重要影响。更多还原

【Abstract】 The Kouquan fault is the east boundary fault of Datong mining area,and Level-3 tectonic unit boundary of the Yungang block depression and the new Sanggan River rift.Tongxin minefield adjoins it.Through the analysis of geometry kinematics dynamics and activity characteristics,the stress state of the Kouquan fault is determined.On this basis,applying the FLAC3D numerical calculation method,the tectonic stress space distribution features on both sides of the Kouquan faultwere analysed,and compared with the strata behavior characteristics of the Tongxin minefield.Research shows that the action of the Kouquan fault is more active and stronger under regional tectonic stress,and its instability is more likely to happen.Tongxin minefield is located in the middle of the strongest activity area of the Kouquan fault.Surrounding rock and coal seams are asymmetrical and present higher tectonic stress,and gather relatively high elastic energy,which determine regional distribution.The Kouquan fault is the geological dynamic factor for strong strata behavior and controls the strata behavior of Tongxin minefield.更多还原