书记沟铁矿地下开采岩层移动界线的圈定

书记沟铁矿地下开采导致地表沉陷垮塌,沉陷坑影响范围可能波及周边村庄,设计采用工程类比法确定岩层移动角,通过现场实地调查运用数值模拟软件对该矿地下开采过程进行模拟分析研究,最终确定出岩层移动角为：斜长角闪岩上盘62.5°,下盘62°,走向65°,第三系、第四系移动角取45°。

Delimitation of Strata Displacement in Underground Mining of Shujigou Iron Ore

The underground mining of Shujigou Iron Mine led to the surface subsidence and collapse. And the subsidence pits can potentially spread to surrounding villages. In the design the engineering analogy method was used to determine the rock displacement angle. Based on the on-site survey, the numerical simulation software was adopted to make a simulation analysis research on the underground mining of the mine, and it finally get the strata displacement angle: when the upper plate of amphibolite at 62.5°, the lower plate at 62° with the strike of 65°, the movement angle is determined to be 45° at Tertiary and Quaternary System.