Application of High Strength Anchor in Supporting for Deep Coal Mine Tunnel

Abstract:

The shoring results for coal mine under the soft rock conditions were not perfect. The author thought that adjustment of pre-stress in a efficient method to improve shoring results. Test was made on worm steel anchor, Huaibei pre-stressed anchor and high pre-stress anchor, to compare the shoring results. The high pre-stress anchor shown that it can efficiently control the surrounding rock deformation in tunnel under deep earth. Meanwhile it has good economic benefits.