Recovery methods of residual ore in complex condition of mined-out zones in Chifeng Guowei mine

Many half stopes are left by disorder mining in Chifeng Guowei Mine, overstocking lots of ore and causing risks of pressure. Mining condition is so complicated that mining projects can not be arranged above 850m level. After studying, mining tunnels are arranged in 840m level, caving with bundle holes is used to recovery residual ore. The goals of recovering residual ore and solving risks of pressure are successfully achieved.