Research on multiple coupling control technology of deep mine roadway with soft surrounding rock

In view of the serious deformation and failure of deep mine roadway with soft surrounding rock and the difficulty of roadway support, based on the engineering background of Xingdong Coal Mine -980 m main roadway, by means of the field survey, theoretical analysis, numerical modeling, industrial test and other research means, the failure mechanism and control technolgy of surrounding rock were studied.The influence of different horizontal stress on the failure of roadway surrounding rock were analyzed, the deformation failure mechanism of -980 m main roadway was revealed. A multiple coupling control scheme was proposed, which was composed of "section optimization + high prestressed anchor cable + high-strength contractible ring support + delayed grouting", an it was verified by field industrial test. The results show that the control technology can effectively solve the problem of surrounding rock deformation control of roadway with high horizontal stress in deep mine, and can provide reference for deformation control of similar deep mine soft rock roadway.