金川龙首矿充填采矿与地表沉降规律探讨

Discussion on Filling Mining of Longshou Mine in Jinchuan and the Laws of Surface Subsidence

金川龙首矿采用下向水平分层六角形进路式充填采矿法,采用双中段大盘区同时回采的模式。应用FLAC3D数值分析软件,探讨了龙首矿进路式采矿及充填对地表下沉的影响规律。通过对开挖区地表11个监测点的位移监控,得出了地表变形不仅存在着沉降运动,还伴随着复杂的拱起变形等结论,同时探讨了矿山应重点监测区域,为防止地表大范围变形破坏提供了理论依据与技术指导方向。

Longshou mine in Jinchuan adopted the underhand horizontal hegagon drifts and filling method with the mining mode of double middle broader stopes. FLAC3D numerical analysis software was used to explore the influence of the drift filling method in Longshou mine to the surface subsidence. Through the displacement monitoring of 11 monitoring points at the excavation surface area, it comes conclusion that the surface deformation not only shows the settlement move- ment,but also is along with a complex arch deformation. At the same time, some areas in the mine should be monitored closely. This provides a theoretical basis and technical direction to prevent a wide range of deformation and failure of the surface.