在我国磷、硫等化工矿山和铜、铁、铅等冶金矿山,适宜地下开采的倾斜和缓倾斜中厚矿体均占一定比重。过去,有关矿山曾分别采用过底盘漏斗空场法,爆力运搬法,分层崩落法,无漏斗分段崩落法,壁式陷落法,水平分层充填法,以及方框支柱充填法等,不同程度地存在着开采强度低,周期长,劳动强度大,效率低,成本高,安全性差等问题。后经多年生产实践的探索,多种方案的房柱采矿法得到了推广应用,采用有底部结构分段崩落法的矿山也日渐增多,但 In our country such as phosphorus, sulfur and other chemical mines and copper, iron, lead and other metallurgical mines, suitable for underground mining of inclined and gently inclined medium thick ore accounts for a certain proportion. In the past, the mine had been used under the chassis funnel empty field method, the explosive force move method, the subsidence method, without funnel subsidence method, the wall fall method, the level of filling method, and the square pillar filling method , To varying degrees, there are problems such as low exploitation intensity, long period, heavy labor intensity, low efficiency, high cost and poor safety. After years of exploration and practice of production practice, a variety of programs have been popularized and applied in the pillar mining method, and the number of mines that adopt the sub-structure caving method with a bottom structure is also increasing day by day.