Stability analysis of sublevel open stoping with subsequent filling in stoping and filling process and strength of filling body matching

The research background in this paper is the south region of Sijiaying Iron Mine using sublevel open stoping with subsequent filling method.Based on the existing engineering geological data,using the method of classical theoretical model and engineering analogy,the stability is analyzed in four aspects:room,cementing filling body,filling body under the action of surrounding rock and stope pillar bearing structure.Matching study on the strength of filling body for stope wall rock is presented as well in this paper,and whether the strength of filling body can meet the requirements for stability in stoping and filling process is verified.