Secondary Roof Bloting with Anchor and Wire Mesh Support Technology of Soft Rock Roadway in Deep Mine

In order to solve the problem of deep soft rock roadway support difficultlty in Chaohua Coal Mine, numerical simulation, theoretic analysis and site observ ation were applied to analyze the failure reasons. The deep soft rock roadway with original support was passive support which couldnOt adapt the deformation of deep soft rock roadway. Based on the analysis, secondary roof bloting with anchor and wire mesh support technology with high strength and stability was presented. The first high strength pre- stressed bloting with wire mesh support could reinforce surrounding rock in time and form high strength bearing structure with surrounding rock, the s . tability and load carrying capacity of the bearing structure was improved by secondary anchor supplement support. The results showed that secondary roof bloting with anchor and wire mesh support technology was applied to deep soft rock roadway, the maximum roof- to- floor convergence was 73 mm, the maximum rib- to- rib conver gence was 51 mm, the maximum roof- to- floor convergence speed was 1. 62 mm/ d, the maximum rib- to-rib convergence speed was 1. 13 mm/ d, the deformation of deep soft rock roadway was controlled effectively.