The roadways in weakly cemented coal measures in Xinjiang are generally difficult to excavate and maintain,and the safety is poor.It is of great significance to master the distribution characteristics of mine in-situ stress for mine construction and safe production.The size and direction of three-dimensional in-situ stress distribution in Weizigou Coal Mine were measured by hollow inclusion stress relief method.Based on the results of in-situ stress measurement,a numerical model was established to analyze the actual deformation and failure of roadway,and the corresponding support scheme was proposed.The results are concluded as follows.Firstly,the type of in-situ stress field in Weizigou Coal Mine is σHV type,and the maximum horizontal principal stress has a significant influence on the deformation and failure of roadway and the appearance of mine pressure.Secondly,the deformation of roadway surrounding rock is affected by tectonic stress in different degrees.The overall performance is:roof＞right side＞floor＞left side.Thirdly,the supporting scheme of asymmetric anchor net cable spray+argillaceous floor grouting bolt was put forward.This scheme plays a good control role in the deformation of surrounding rock of weakly cemented roadway under the action of tectonic stress,and has achieved good control effect of roadway surrounding rock.
关键词
地应力测量/构造应力/弱胶结地层/围岩变形/支护方案
Key words
In-situ stress measurement/Tectonic stress/Weakly cemented strata/Deformation of surrounding rock/Supporting scheme
维普
万方数据