Abstract:Abstract:In the process of mining underground non-ferrous metal mines, the pressure control mode of taking independent pillar is used normally. This method may lead to the loss of the mining resources. Before the pillar mining, we use the grouting process can improve the working condition and safety, and the rate of recovery can be improved, too. This method is meaningful for us when the pillar is large in quantity, the stability of the rock is not so good, the empty area is large, and there is no cemented filling mining system.