Soft rock roadway anchorage force device

Abstract

The invention discloses a soft rock roadway anchorage force device comprising an anchor rod, an anchor rod disc, cement slurry, mud rock and a bottom plate. The anchor rod is arranged inside the bottom plate and externally filled with re-jetting slurry; the lower portion of the re-jetting slurry is filled with inverted-arch initial-jetting slurry, and a mesh is arranged between the re-jetting slurry and the inverted-arch initial-jetting slurry; the mud rock is arranged on the lower portion of the inverted-arch initial-jetting slurry; the anchor rod disc is arranged on the surface of the anchorrod in a penetrating mode; and anchorage agents are arranged on the lower portion of the cement slurry and wrap the surface of the anchor rod. The anchorage agents and the cement slurry are adopted on the bottom plate and matched with a full-length anchorage method, so that the water insulation and anchorage effects are strengthened, and the defects that when water exists in the bottom plate, anchorage of the anchorage agents and the hole wall is affected by slime formed by contained water in an eye hole; only the requirement for pretention force can be met through a traditional method; and when a roadway is pressed, it cannot be ensured that the anchorage end meets the requirements for yield force and breaking force of the anchor rod, consequently, the anchor rod and the anchor agents are overall pulled out, and overall supporting loses efficacy are overcome.

Description

technical field [0001] The invention relates to the technical field of bolt fixing, in particular to an anchor force device for soft rock roadways. Background technique [0002] The geological strata of the new Shanghai No. 1 Coal Mine are mainly soft rock formations such as mudstone and sandy mudstone. The focus is on floor treatment. The anchoring force of the anti-bottom arch anchor is the most critical factor in determining floor treatment. It is necessary to further improve the anchorage quality of soft rock roadway bolts (cables), so as to meet the requirements of ensuring roadway formation and reducing roadway maintenance costs. Under rocky geological conditions, especially in water tunnels, solving the problem of anchoring force of floor bolts basically solves the problem of soft rock. Most of the mines in Shanghai Miao mining area are in soft rock formations. The development and preparation of mines will encounter the same problem. Floor treatment in the same adjac...

AI Technical Summary

Problems solved by technology

[0009] Aiming at the deficiencies of the prior art, the present invention provides a soft rock roadway anchoring force device, which solves the problem of the anchoring force of the anti-bottom arch bolt in the floor treatment of the roadway support in the soft rock formation

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