关键词: 特大采空区, 尾砂充填, 封闭墙

Abstract: 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.

Key words: Extra-large mined-out spacies, Tailings filling, Enclosing wall