Abstract: According to the model of fracture instability and shear instability failure of two sides of mining roadway,the reasonable support resistance of two sides of stability and the composite support of bolting and shotcreting under the condition of bolting and shotcreting support are studied.On the basis of analyzing the failure characteristics and mechanism of two sides of rock bolts and solids in the mining laneway,it is considered that the design of the two sides in the deep well mining roadway is partial to safety according to the shear instability failure model.Based on the above discussion results,the design and calculation method of the support resistance of two sides of bolting and shotcreting support under the condition of bolting and shotcreting support is put forward.The above study conclusions can be used as a reference for the reinforcement mechanism and design of bolting and shotcreting support.

Key words: Bolting and shotcreting support, Shear instability, Support resistance