THE METHOD TO DETERMINING OPTIMAL STRUCTURE PARAMETER OF NON-PILLAR SUBLEVEL CAVING

Because of anciently usually adopting empirical method to determine the structure parameter of non pillar sublevel caving,there are hard to guarantee parameter optimize.The paper has analyzed the shape and influence factor of draw-off body and pilling body of ore,on whose foundation the paper puts up with the criterion of optimal structure parameter,this is,the volume of pure ore drawing is largest and the ratio of pure ore recovery is highest,according to which the paper provides the method to determining optimal structure parameter.In addition,the paper has calculated the theory value of optimal structure parameter by the case of Xiaoguanzhuang iron mine of Luzhong metallurgic mine corporation.