传统的错动角圈定地表陷落范围的方法往往与生产现状不适应。为了研究地表塌陷坑临界散体柱高度与陷落范围的关系,根据西石门铁矿地表塌陷坑内移动散体的侧向支撑力作用分析,提出了当塌陷坑散体的厚度不小于临界散体柱高度时,散体的主动压力与被动压力共同阻止边壁岩体的片落活动,研究了影响临界散体柱高度的相关因素。结果表明:使用井下废石对地表塌陷坑进行回填,可有效降低临界深度和控制地表陷落范围。 The traditional methods of determining the extent of surface subsidence are often incompatible with the current status of production. In order to study the relationship between the critical bulk column height and the falling range of the surface subsidence pit, according to the analysis of the lateral supporting force of the moving bulk in the surface subsidence cave in Xishimen Iron Mine, when the thickness of the collapse pothole is not less than the critical bulk column At height, the active pressure and the passive pressure of the bulk co-block the movement of the side wall rock mass, and the relevant factors that affect the height of the critical bulk column are studied. The results show that the use of downhole waste rock to backfill the surface subsidence pit can effectively reduce the critical depth and control the surface subsidence range.