湖北远安盐池河磷矿开采区稳定性评价

Stability evaluation of Yanchihe phosphate mine in Yuan’an, Yichang, China

磷矿开采区诱发的地质灾害已严重威胁到远安县人们的生命财产安全。本文以远安县盐池河磷矿开采区为例,对区内磷矿的开采范围、开采方法以及采空区分布特征进行介绍,分析了采空区内的变形机制;对采空区稳定性进行定性评价,以磷矿开采深厚比(H/M)作为稳定性评价依据,利用GIS软件拟合分析得出区内磷矿开采深厚比等值线图,对等值线图分析得出稳定性分区图;研究区共分三大区:稳定性差区、稳定性较差区、稳定性较好区,分别对各区进行稳定性评价,并提出相应的防治建议。

Geologic hazards being induced by phosphate mining badly threaten the life and property security of Yuan＇an residents. This paper, taking Yanchihe phosphate mine as example, gives a general introduction of phosphate exploitation rang, methods and distribution characteristics of mined-out area, analyzes the deformation mechanism. Meanwhile it takes mining H/M ratio to make the qualitative assessment of geologic stability, works out the H/M value via GIS software fitting and stability zone chart. Three degree stability of Yuan＇an Yanchihe phosphate mine are subdivided： area lack of stability, little unstable area and comparatively stable areas. And sta- bility assessment and correspondingly preventive suggestions are giving for those different areas.