【摘要】 为了研究急倾斜岩层中巷道的稳定性,采用理论分析与数值模拟相结合的方法,分析了500~1 000 m深度下75°倾斜岩层中巷道开挖后的变形特征及围岩应力分布规律。结果表明:急倾斜岩层中的巷道变形,主要受倾斜层理及软弱岩层的层间滑动控制,巷道开挖后的最大变形方向与岩层的倾向基本一致,并且随着巷道的深度增加,变形量也逐渐增大。而且,巷道围岩的变形与应力分布具有非对称特征。数值模拟结果与解析解对比表明,由于解析解的限制,在靠近巷道的围岩处与数值模拟结果有一定的偏差,但是进入弹性区后,两种解的结果具有较好的一致性。更多还原

【Abstract】 In order to study the stability of the roadway in steeply inclined rock formation, theoretical analysis and numerical simulation were combined to analyze the deformation characteristics and stress distribution law of the surrounding rock after excavation in a 75° inclined rock formation at a depth of 500 ~ 1 000 m.The results showed that the deformation of the roadway in the steeply inclined rock formation is mainly controlled by the inclined bedding and the interlayer sliding of the soft rock. The maximum deformation direction after the excavation of the roadway is basically consistent with the tendency of the rock formation, and as the depth of the roadway increases, the amount of deformation also gradually increased. Moreover, the deformation and stress distribution of roadway surrounding rock are asymmetrical. The comparison between the numerical simulation results and the analytical solutions shows that there are certain deviations from the numerical simulation results in the rock near the roadway because of the limitations of the analytical solution.However, after entering the elastic zone, the results of the two solutions have good consistency.更多还原