Abstract:

In order to solve the engineering problem on supporting difficult in intersection of medium-section in mine roadway, this paper takes the example of Yushe mine in Guizhou to conduct mechanic analysis research on damage situation of wedged wall which is located at the intersection between transportation rise roadway and 1265 conveyance stone door. The damage reasons are gained, the combined support techniques are conducted by using the steel frame, anchor cable, anchor and shotcrete which is the sealing technology of surrounding rock, the capacity of compress strength are improved. After the application of the supporting technology, we conducted a long-term monitoring record of "NiuBiZi" project, the results show that the construction of " NiuBiZi " project achieves a good supporting effect, the deformation of surrounding rock is small, the stability of surrounding rock is better.

Key words: Roadway Intersection, Failure situation, Combined support, Mechanical analysis, Supporting effect.