Calculation Of Aquifer Parameters And Analysis Of The Mechanism Of Shaft Settlement And Deflection In GuoTun Mine

Guo Tun coal mine is located in the north central part of the Juye coalfield,its coal resources are very rich and covered by the thick loose layer.Due to the influence of mine mining,the water level's dynamic change in the bottom of the loose layer of the newly developed system has caused some deviation and settlement to the shaft of the industrial square.For this,based on the domestic and foreign data,the hydrogeological characteristics of the mine main,auxiliary and wind well were analyzed systematically.The Slug test and water level dynamic monitoring are carried out to calculate the bottom of the Cenozoic aquifer(s)hydrogeological parameters,and the water pressure test was carried out in the later stage to verify the hydraulic connection and the permeability of the loose layer.Then,the Flac3D software is used to simulate and analyze the stress of the surrounding rock under the bottom of the loose layer in drain water condition.Through simulation of the wellbore to produce skew and settlement processes,combined with folds and fracture geological conditions,it is found that the mining conditions of the mining area and the change of the water level in the bottom aquifer are the main factors of the settlement and deflection of the wellbore.