The Research Of The Bolt And Grouting Composite Supporting Technology In Soft Rock Roadway

At present, most of the coal mine roadway adapt composite support scheme. There are many forms of composite support. Bolt and grouting support technique is an effective way that used in engineering widely. In this paper, we use double-layer steel mesh shell structure, the main role of the external network is still temporary support. However, the effect of internal meh is that change the concrete from the plane stress state to three-dimensional stress state that can make it to confined concrete. In this paper, We have get the differences between the U-shaped scaffolding supporting structure, a single dual-network anchor double anchor shell structure and a single anchor double anchor shell+dual network anchor structure., get the stress of dangerous section in the supporting structure. The paper works numerical simulation analysis by ABAQUS. we can analysis the carrying capacity differences by comparating the U-shaped scaffolding supporting structure, a single dual-network anchor double anchor shell structure and a single anchor double anchor shell+dual network anchor structure. The results showed that there are the more obvious advantages of a single network anchor double anchor shell structure and a single anchor double anchor shell+dual-network structure than other anchor structure.The results should have a very important theoretical significance to soft rock roadway support scheme.