Anchor rod anchoring force device for soft rock roadway

A technology of anchoring force and anchor rod, which is applied in the direction of installing anchor rod, mining equipment, earth square drilling and mining, etc., to achieve the effect of increasing the force-bearing area and shear strength

CN108167008AInactive Publication Date: 2018-06-15朱胜伟
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-06-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an anchor rod anchoring force device for a soft rock roadway. The anchor rod anchoring force device comprises an anchor rod, an anchor rod disc, cement slurry, mudstone and a bottom plate. The interior of the bottom plate is provided with the anchor rod. The exterior of the anchor rod is filled with re-jetting slurry. The lower portion of the re-jetting slurry is filled with inverted arch initial jetting slurry. Net pieces are arranged in the middles of the re-jetting slurry and the inverted arch initial jetting slurry. The lower portion of the inverted arch initial jetting slurry is the mudstone. The anchor rod disc is arranged on the surface of the anchor rod in a penetrating mode. The lower portion of the cement slurry is provided with an anchoring agent. The surface of the anchor rod is wrapped with the anchoring agent. According to the anchor rod anchoring force device, a method that the anchoring agent and the cement slurry are matched with full length anchoring is adopted, the water isolation and anchorage effects are improved, when the bottom plate contains water, slime formed due to eye holes with the water affects anchorage of the anchoring agent and the hole walls; and according to an adopted traditional method, pretightening force requirements can only be met, when the roadway is under pressure, it cannot be ensured that the anchorage end meets requirements of yield and breaking force of the anchor rod, so that the anchor rod and the anchoring agent are pulled out integrally, and whole support fails accordingly.
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Description

technical field

[0001] The invention relates to the technical field of bolt fixing, in particular to a soft rock roadway bolt anchoring force device. 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 adj...

Examples

Embodiment Construction

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] Such as Figure 1-2 As shown, the present invention provides a technical solution: soft rock roadway bolt anchorage force device, comprising bolt 4, bolt disk 5, cement slurry 6, mudstone 8 and bottom plate 18, the inside of bottom plate 18 is provided with bolt 4, The outside of the anchor rod 4 is filled with double shotcrete 1, and the bottom of the double shotcrete 1 is filled with the reverse bottom arch primary spray grout 3, and the middle positi...