Mining grouting anchor rope

Abstract

The invention belongs to the technical field of underground coal mine grouting, and particularly relates to a grouting anchor rope. The grouting anchor rope comprises a steel rod, wherein the periphery of the steel rod is fixed with one end of each of eight steel strands; a hollow anchor rope is formed after the eight steel strands are twisted; a grouting pipe is arranged inside the hollow anchor rope; one end, stretching into the steel rod positioned at the rear end of the hollow anchor rope, of the grouting pipe is closed, and the other end of the grouting pipe penetrates out of the hollow anchor rope, so that an internal thread structure is arranged; the other end of the grouting pipe is connected with a quick-joint female head through threads; sieve meshes are distributed in the middle and rear part of the grouting pipe; when the hollow anchor rope is fixed at a grouting port on a coal wall in a sealing mode through a cone-shaped external grouting plug; an anchorage device, a spherical gasket and a tray are arranged on the hollow anchor rope in sequence; the large end part of the cone-shaped external grouting plug is extruded by the tray. Surrounding rocks are grouted through a grouting core pipe, and an anchor rope lock is utilized for pre-tightening, so that the construction technology is convenient and reliable, the integrality of anchoring and grouting is realized, and the bearing capacity and supporting effect of the anchor rope are improved.

Description

technical field [0001] The invention belongs to the technical field of underground grouting in coal mines, in particular to a grouting anchor cable for connecting internal cracks in coal and rock mass and external grouting equipment. Background technique [0002] In the coal mining process of the mine, with the increase of the mining height, the size of the roadway increases, and the maintenance of the roadway encounters great difficulties. Grouting reinforcement is a very effective support method. However, the equipment and process of grouting reinforcement are still in the stage of improvement and exploration, and the research on grouting pipes is also in progress. In the past, the grouting pipes generally used hollow metal pipes, or hollow plastic pipes, or a combination of the two. These types of grouting pipes have certain problems. First, the tensile and shear strength of the grouting pipe itself is not high; second, it cannot be anchored at the end like an anchor cab...

AI Technical Summary

Problems solved by technology

These types of grouting pipes have certain problems. First, the tensile and shear strength of the grouting pipe itself is not high; second, it cannot be anchored at the end like an anchor cable, especially when drilling a hole with a certain elevation angle. , under the grouting pressure, the grouting pipe is easy to fall off, which brings a certain threat to the safety of the operators; the third is that the pre-tightening force cannot be applied, and the effect of controlling the side and top is not good

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