浅埋纵向交叉巷道潜在失稳模式分析

Analysis of potential instability mode of shallow buried longitudinal cross roadway

针对某矿山运输巷道持续大面积冒落问题,通过数值分析的方法,利用FLAC和PFC3D耦合程序,计算了巷道不同暴露时间下与充填后冒落分布情况,表明冒落会持续发生,随着暴露时间的增加,联络道及5#巷道中的冒落持续发展,其中以第一个月的冒落最为严重,冒落集中区以联络道及其交岔点的部位居多,为相同条件地下矿山开采提供一定参考。

Aiming at the problem of continuous large area caving in a mine transportation roadway,the distribution of caving under different exposure time and after filling was calculated by FLAC and PFC3 D coupling program through numerical analysis method.The results show that the caving will continue to occur.With the increase of exposure time,the caving in the contact road and 5#inclined shaft continues to develop,among which the first month's caving is the most serious.The caving concentration area is dominated by the contact road and its intersection,which provides a certain reference for underground mining under the same conditions.