Anchor volt/bolt operation method and the enlarging diameter drill axis for the feather volt/bolt which is used for that

摘要

Topic Adhesion power of being full filler such as adhesive decreasing, anchor volt/bolt comes out and tries not to fall. SolutionsPerforating the tunnel roof, it forms the hole 5, with the enlarging diameter drill axis 1 which possesses enlarging diameter bit 4 enlarging diameter doing the inner part end of the hole 5 in tapered condition of the tip extent, it forms the tapered hole 51. It possesses starting pin 60 in the point, installing the feather volt/bolt 6 which feather 61 opens by the fact that starting pin 60 is overpowered and the pushing is pushed in inside in this hole, 5 shock doing the bottom of feather volt/bolt and 6 making starting pin 60 the inner part end of the hole collide you make feather open 61, fill up the adhesive and lock feather volt/bolt 6. The adhesive deteriorating, feather 61 comes out and obstructs falling. Selective figure Figure 1