Abstract: To mine large-scale poor orebody under complicated fillingbody,the traditional mining methods have a series of problems such as :lower safety and efficiency at mining the jamb,large sources loss,difficult to control stope's roof,hard difficulties with abandoned stope's disposal,high cost,easy to cause large-scale ground press,no safety guarantee to the mine,and ect.To solve these problems,Central-South University adopts mining by middling depth explosive bores with high subsections and derivational roof caving-successive mining method.Through the industrial trial on No.92 orebody of Tongkeng Mine,the technology is proved to have many strongpoints than the traditional mining methods and it can get better technic and economic targets.It has instructional value to similar orebodies' mining.