1. The post- filling mining method can be used for mining deposits where the surface needs to be protected or the column needs to be recovered after the mining is carried out by the segment mining method, the segmental empty field mining method and the stage empty field mining method;
2. Filling should be carried out with high efficiency filling method; when the pillar needs to be recycled, the filling body should have sufficient strength and self-standing height;
3. When the filling body needs to provide the ore channel or the bottom column for the adjacent ore block to be recovered, the bottom of the filling body should be filled with high-ash sand than the cement, and the filling body strength should be greater than 5 MPa ;
4. When the pillar does not need to be recycled as a permanent loss, the goaf should be filled with non-cemented;
5. Before the stope is filled, the drain pipe should be arranged in advance in the stope, and the lower passageway should be constructed with a stable filter wall.
2. Filling should be carried out with high efficiency filling method; when the pillar needs to be recycled, the filling body should have sufficient strength and self-standing height;
3. When the filling body needs to provide the ore channel or the bottom column for the adjacent ore block to be recovered, the bottom of the filling body should be filled with high-ash sand than the cement, and the filling body strength should be greater than 5 MPa ;
4. When the pillar does not need to be recycled as a permanent loss, the goaf should be filled with non-cemented;
5. Before the stope is filled, the drain pipe should be arranged in advance in the stope, and the lower passageway should be constructed with a stable filter wall.
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