宁乡铀矿某矿段地下遗留采空区治理

THE REMEDIATION OF ABANDONED WORKINGS OF A MINING AREA IN NINGXIANG URANIUM MINE

某矿段属典型的浅部"三下"开采,受当时采矿充填技术的制约,矿段开采结束后,遗留的地下采空区体积较大,必须进行治理。宁乡铀矿在退役治理过程中,采用"粘土固化浆液、钻孔注浆充填"等新技术对其地下采空区进行了治理。近期监测结果表明,采空区治理有效地控制住了地面沉降,取得了明显效果。

The typical mining under buildings and river was used in a mining area of Ningxiang uranium mine. After the mining ended, 32.1% of the 2.68 m^3 abandoned workings did not fill because of limitation of the cut-and-fill mining method at that time. To remedy this, the mine used new filling methods. After the remedial action, the filling coefficient of pits reached 100%, and that of tunnels reached 86%. It can be proved by the monitoring data that the subsiding of surface has been effectively controlled at the abandoned workings.