某地下矿山主溜井垮塌对主井的影响分析研究

Study on the Influence of Collapse of Main Chute on Main Shaft of an Underground Mine

采用三维激光探测系统(CMS),对某矿山垮塌主溜井进行三维激光探测,获得垮塌空间三维坐标,利用3Dmine软件建立溜井垮塌空间三维可视化模型,及时掌握主溜井垮塌形态。运用FLAC^(3D)软件对主溜井垮塌破坏情况进行数值模拟,重点分析了主溜井垮塌对主井的影响,掌握了主溜井围岩的地压分布及垮塌破坏状况。数值模拟过程表明:主溜井正在加速垮塌,主井井壁没有出现塑性破坏,井壁最大弹性位移值达到了15 mm,主井-105^-135m区域为应力集中区,垮塌空间顶板上方区域出现了约30 m的拉伸塑性区。研究结果可为矿山应对主溜井垮塌的措施提供技术指导。

The collapse of main chute of a mine is conducted 3D laser detection by adopting 3D laser detection system（ CMS）,the 3D coordinates of collapse space is obtained,3D visualization model of collapse space of chute is established based on 3Dmine software,so as to master the collapse form of main chute. The collapse failure of main chute is conducted numerical simulation by using FLAC^（3D）software,the influence of the collapse of main chute on main shaft is analyzed emphatically,information of underground pressure distribution collapse failure of the surrounding rock of main chute are obtained. The numerical simulation results show that the collapse of main chute is accelerated,the plastic failure is not appeared in the main shaft wall,the maximum elastic displacement of the main shaft wall is reached to 15 mm,-105 ^-135 m of main shaft is the stress concentration area,the tensile plastic zone with the range of 30 m above the upper of the roof of collapse space is appeared. The above analysis results can provide technical guidance for taking some related measures to deal with the collapse of main chute.