Analysis and evaluation of the instability chain of room and pillar goaf in Western China ecological fragile area

Abstract

The Yushenfu mining area is a typical ecologically fragile area in western China. The ground subsidence accident caused by the sudden instability of a large area of coal mine goaf has endangered the local ecological environment and safety of production and life. Based on the case analysis of the instability of the goaf of the coalmine in the Yushenfu Mining Area, the paper analyzes the ultimate strength and stress of the coal pillar under the action of the coal and rock’s own weight, and studies the influence of external factors such as static ground load, dynamic load, and mining disturbance. A chain analysis and evaluation of goaf instability under the influence of multiple factors has been carried out. Practice has shown that the chain analysis and evaluation of goaf instability is an effective method.