Abstract: Aimed at mining conditions that the hanging wall of inclined thick deep orebody is existing fault gouge in Xiadian Gold Mine,now the main problems of high loss and dilution rate and hard surface protection were appeared with sublevel caving method used.The combination of present situation and mining conditions,the test scheme of pre-truncating crest disaster isolation mining was proposed.In the stope,the triangle ore of hanging wall was mined at first.Then the goaf was filled with high concentration and high cement-sand ratio of classified tailings to isolate the disaster body at hanging wall with poor stability.In the ore block,the pillar was mined in advance,and the goaf was filled by high strength cemented tailings.Then the room was mined,and filled by low strength cemented tailing or hydraulic sands.The tests has indicated that the scheme can better control ground pressure,decrease the loss and dilution of ore,and increase the production capability to achieve the targets of safety,efficiency and low costs in mining of deep orebody.

Key words: Mining method, Deep mining, Pre-truncating crest, Disaster isolation