掘进扰动下巷道冒落特征研究

Study on caving characteristics of roadway under excavation disturbance

针对某矿山因掘进扰动冒落问题,采用FLAC和PFC3D耦合程序,计算了联络巷道在掘进过程中的冒落特征和冒落区范围,得出:掘进过程中自5#斜井开始,冒落会持续发生,初始冒落范围为5#斜井与联络道交岔点的位置;联络道为冒落的高发区域,主要表现为顶板冒落,自联络巷道掘进开始至6#斜井掘进完成,冒落会持续产生,不易控制,冒落区较大,为相同条件地下矿山开采提供一定参考。

Aiming at the problem of caving caused by excavation disturbance in a mine,the caving characteristics and the range of caving area in the process of excavation are calculated by using FLAC and PFC3 D coupling program through numerical analysis.It is concluded that the caving will continue to occur from the 5#inclined shaft in the process of excavation,and the initial caving range is the position of the intersection point between the 5#inclined shaft and the contact road.The connecting roadway is a high incidence area of caving,which is mainly manifested as roof caving.From the beginning of the excavation of the connecting roadway to the completion of the excavation of the 6#inclined shaft,the caving will continue to occur,which is not easy to control,and the caving area is large,which provides a certain reference for underground mining under the same conditions.