特大采空区充填技术

冬瓜山铜矿浅部东、西狮子山矿段开采结束后，形成了2个特大采空区一直没有得到处理，对矿山正常生产及周边环境造成了一定影响。冬瓜山铜矿深部矿体采场于2006年投产，矿山采选生产能力为13 000 t/d，选矿厂所产生尾砂量除正常进行深部采场充填外还略有多余，为了解决多余尾砂排放问题，采用尾砂充填方式对特大采空区进行处理，处理过程中解决了诸如封闭墙设计和滤排水以及尾砂输送与充填控制等问题，从而消除特大采空区存在所带来的安全隐患。

Technology of Filling Extra-Large Mined-out Spacies

Two extra-large mined-out spacies formed by the mining at the shallow east and west Shizishan mine sections of Dongguashan Copper Mine remained untreated for a long time, causing certain impact on the normal mining production and the surrounding environment. The deep mining of Donggushan Copper Mine started in 2006 and the mining and mineral processing capacity is 13 000 t/d. The tailing sands produced by the concentrator are normally used to fill the deep mined-out area and there are still slightly surplus tailings. To solve the issue of the surplus tailing discharge, this part of tailings is used in treating the above-said extra-large mined-out spacies. In the process, several issues have been solved such as enclosing wall design, water drainage, tailings transport and filling control. As a result, the hidden safety dangers due to the existence of these extra-large mined-out spacies have been removed.