Study on repair and reinforcement technology of auxiliary shaft ingate in coal mine
RONG Chuanxin
XIE Dezhu
WANG Bin
CHEN Qiang
XU Ping
Abstract：The major reason of the failure of the ingate of auxiliary shaft of Tarangaole Colliery was the heterogeneous stress on the structure which caused by that the weak surrounding rock would expand and soften when it met water.In view of this destruction characteristic,the ingate was repaired and strengthened,the" Anchor +29U steel + W type steel strip +Shotcrete" was adopted as the temporary support,and the SFRC80 steel fiber concrete structure was used as the permanent support,and the stress condition of the repaired structure was monitored.Monitoring results showed that the load of steel fiber reinforced concrete structure was small,the stress of steel bar and strain of concrete of the rebuilding structure was less than its safety value,which showed that the repair and reinforcement scheme was reasonable and reliable,and the repair plan could provide reference for similar projects.
Keywords：ingaterepair and reinforcementweak rock stratumsteel fiber concrete
Publication Date：2017-01-01