Bolt support technology for mining gateway of island mining face in Shuoli Mine

During the coal mining in the boundary and island area of Shuoli Mine,the strata behavior of the coal mining face gateway were obvious.Therefore a goaf side entry driving with small pillars was applied to the gateway.The bolt support system was the main support mode for the gateway,which could overcome the disadvantages of the H steel arch supports.With the calculation and the site real conditions,different rational parameters of the support modes ware settled.The roof convergence and the sidewall convergence of the gateway were small and the support results were good.