Research On The Rupture Mechanism Of Shaft Lining And Treatment Technology Of The Auxiliary Shaft Wall In Wugou Mine

Fracturing of shaft lining is a special engineering geologic hazard and is caused by interaction between mining and geological environment. The thesis based on previous research, through theoretical analysis and FLAC3D numerical simulation aiming at the study of fracture mechanism and control technology of Wugou auxiliary shaft. The main research work of this thesis are:(1) Analysis the Wugou auxiliary shaft damage conditions and mechanism, through summing up of Wugou coal mine practical engineering geology and hydrogeology and combination the theory of comparative mine shaft destruction.(2) The numerical simulation model was built based on the engineering geological model of Wugou auxiliary shaft. Simulate additional stress of the fourth aquifer drawdown and displacement based on principle of effective stress and by FLAC3D,and final fitting out relation formula between additional stress of shaft lining and fourth aquifer drawdown.(3) According to the relevant technical experience of shaft lining fracture treatment,adopted grouting reinforcement, opening unload and racking loop measures in auxiliary shaft. The treatment effect show they can effectively help to cut down the vertical additional force of shaft lining.