Anchor rod anchoring device for surrounding rock of roadway and anchoring method of anchor rod anchoring device

Abstract

The invention discloses an anchor rod anchoring device for a surrounding rock of a roadway and an anchoring method of the anchor rod anchoring device. An anchoring blind hole is formed in the surrounding rock; an anchor rod penetrates through the anchoring blind hole; the anchoring blind hole comprises a first hole section, a second hole section and a third hole section which extend outwards from the bottom; a resin anchoring agent is arranged between the first hole section and the anchor rod; a cement anchoring agent is arranged between the second hole section and the anchor rod; a sealing head is arranged inside the third hole section. According to the invention, the resin anchoring agent is matched with the cement anchoring agent by sections to enable the anchor rod to realize whole-length anchoring, so that the stability of the surrounding rock is improved, and the displacement and displacement speed of the surface of the roadway are reduced; besides, the mounting resistance of the anchor rod can be reduced through the adoption of the cement anchoring agent, so that the adjustable and controllable solidification speed of the resin anchoring agent is realized; moreover, the anchoring blind hole is sealed by adopting the sealing head to avoid leakage of cement slurry, so that the fact that the anchoring area is filled up with slurry is guaranteed, and the overall supporting effect of anchoring is improved.

Description

technical field [0001] The invention relates to the technical field of full-anchor construction of coal mine roadways, in particular to a bolt anchoring device used for roadway surrounding rocks. Background technique [0002] At present, most roadways adopt the form of end anchorage. Due to the supporting cracks between the end anchorage and the bolt hole, during the stress deformation process of the rock mass, firstly, the fragmentation and expansion of the surrounding rock will cause the rock strata to slide, resulting in stress shearing, and then The shear failure of the rod body is caused; the second is that after the separation layer in the surrounding rock, the tensile stress acts on the pallet, and the fracture of the pallet leads to the failure of the entire bolt support. Contents of the invention [0003] The present invention mainly solves the technical problems existing in the prior art, thereby providing a bolt anchoring device and an anchoring method for roadw...

AI Technical Summary

Problems solved by technology

[0002] At present, most roadways adopt the form of end anchorage. Due to the supporting cracks between the end anchorage and the bolt hole, during the stress deformation process of the rock mass, firstly, the fragmentation and expansion of the surrounding rock will cause the rock strata to slide, resulting in stress shearing, and then The shear failure of the rod body is caused; the second is that after the separation layer in the surrounding rock, the tensile stress acts on the pallet, and the fracture of the pallet leads to the failure of the entire bolt support

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