Practices on Bolt/Steel Mesh/Anchor Combined Support Technology of Mining Gateway in Deep Mine

Taking the upper gateway of No.21132 coal mining face in Changcun Mine as an example, the theoretical analysis and the engineering analogy method were applied to study the control effect of the surrounding rock deformation with the bolt/steel mesh/anchor/H type steel shield combined support under the condition of high stress in the large cross section of deep full seam and optimize the support parameters of the gateway.The length of the bolt was 2.4 m, the space between the ro ws was 0.6 m and the space between the H type steel shields was 0.4 m.A site experiment was conducted. The experiment results showed that the application of the bol t/steel mesh/anchor/H type steel shield combined support could improve the pre-stress of the bolt.The bolt applied in the roof and floor and the roof anchor could effecti vely control the deformation of the gateway and improve the stability of the gateway.