Study On The Stability Of The Surrounding Rock Of Inclined Shaft In Thick Gravel Stratum With Abundant Water

In order to solve the problem encountered during mine established process in water-rich thick gravel layer of the western region, in the research background of umber1 mine of Ili in Xinjiang, using these methods including laboratory experiments, model test, numerical calculation and field test, the stability of inclined shaft surrounding rock in the water-rich thick gravel layer is studied. The results show that,in the Ili mine gravel layer, it's strength index has a decreasing trend overall, with the increase in moisture content; while permeability coefficient k decreases with the gravel soil confining pressureσ3 increase, it decreases with the increase in void ratio and waterhead; the inclined shaft surrounding rock in the thick gravel layer large section without water is showed as a strong self-stability; the ground pressure of inclined shaft surrounding rock in the water-rich thick gravel layer has strong performance, and is easy to instability; depth, the section size, and water seepage are importarit factors that affect the stability of inclined shaft surrounding rock in the gravel layer. Among these, water seepage is critical factor which affect the stability of inclined shaft surrounding rock in the gravel layer. The support Method of advance support, temporary support and permanent support combined is effective method that solves the stability of inclined shaft surrounding rock in the water-rich thick gravel layer...