Support Problems and Improvement of Broken Roof of Roadway
Coal mine is susceptible to the influence of complex geological environment in the mining process,which poses a certain threat to the excavation support of roadway.Among them,the collapse column will cause the coal seam roof to break and sink,the floor bulge and the two sides to shrink,and the original roof support operation can not be effectively supported,which brings safety risks to the coal mine.Taking Qingciyao Coal Mine as the research object,the support problems of broken roof was analyzed,and the improvement and optimization measures of the support scheme were discussed,and the support scheme of"permanent support+truss anchor support+π steel shed support"was proposed.After practical application,the application value of the optimization scheme was clear,which is conducive to improving the support effect of broken roof.
NETL
NSTL
万方数据
