Roof reinforcement grouting equipment and grouting method

Abstract

The invention discloses roof reinforcement grouting equipment and a grouting method. The grouting equipment comprises a funnel grouting cutter head, an inner sleeve tube and an outer sleeve tube, theinner sleeve tube and the outer sleeve tube are all opened at the top ends, the inner sleeve tube is located in the outer sleeve tube, and the top ends of the inner sleeve tube and the top end of theouter sleeve tube are fixedly connected through a ring-shaped steel plate; an inner air bag is pasted on the inner wall of the inner sleeve tube, and mounting holes are formed in the two sides of theinner air bag; the funnel grouting cutter head comprises a funnel body bottom and a grouting pipe, the funnel body bottom is pasted on the inner wall of the inner air bag, the grouting pipe penetratesthrough the mounting holes and extends to the outer side of the outer wall of the inner air bag, and a through hole for penetrating of the grouting pipe is arranged on the position, corresponding tothe mounting holes, of the outer sleeve tube; an outer air bag is pasted on the outer side of the upper end of the outer sleeve tube; and vent holes are formed in the bottom of the outer sleeve tube,the vent holes are covered with a breathable blocking cloth, and the breathable blocking cloth is pasted on the outer wall of the bottom of the outer sleeve tube. The roof reinforcement grouting equipment is simple in structure and convenient to operate, regular bolt holes are not needed to be punched after grouting is conducted, and the engineering quantity is lowered.

Description

technical field [0001] The invention belongs to the technical field of mine roadway support, and in particular relates to roof reinforcement grouting equipment and a grouting method. Background technique [0002] In the engineering application of bolt support, the failure mode of the bolt is mainly the sliding between the bolt and the hole wall when encountering the coal ash adhered to the hole wall or the broken and soft surrounding rock during the anchoring process. In order to solve the problem of bolt slipping and instability, the bolt hole reaming method is often used in the prior art to solve such problems, such as the prior art CN 109779662 A which discloses a soft coal rock roadway bolt The method of reaming and filling support at the bottom of the hole is to ream the hole at the bottom of the anchor hole, and then perform grouting. After the grouting, re-drill the ordinary anchor hole for anchoring. Rock properties, increase the bolt anchoring performance. However...

AI Technical Summary

Problems solved by technology

However, it needs to re-drill the ordinary bolt holes for anchoring after grouting, which increases the amount of engineering and operating costs, and increases the amount of grout used

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