Hole sealing, grouting and water plugging reinforcement method for anchor cable hole in roadway water spraying area

Abstract

The embodiment of the invention discloses a hole sealing, grouting and water plugging reinforcement method for an anchor cable hole in a roadway water spraying area, and relates to the technical field of coal roadway mining surrounding rock control. Grouting reinforcement can be conducted on an existing anchoring anchor cable hole, so that water spraying of the anchor cable hole is reduced to a certain degree, corrosion of an anchor cable is slowed down, and the anchoring force of the anchor cable in a roadway water spraying area is enhanced. The hole sealing, grouting and water plugging reinforcement method for the anchor cable hole in the roadway water spraying area comprises the steps that a grouting hole is obliquely drilled in the periphery of an existing anchor cable hole in a top plate of the roadway water spraying area towards the interior of the anchor cable hole, and the grouting hole communicates with the anchor cable hole; a grouting pipe and a plugging pipe are inserted into the grouting hole, wherein an annular space is formed between the inner wall of the plugging pipe and the outer wall of the grouting pipe; a high-water-content rapid-hardening expansion material is poured into the anchor cable hole through the annular space in the plugging pipe; and after the high-water-content rapid-hardening expansion material is solidified, grouting is conducted in the deep area in the anchor cable hole. The reinforcement method is suitable for grouting reinforcement of the anchor cable hole in the water spraying area of the weakly cemented soft rock roadway.

Description

technical field [0001] The invention relates to the technical field of surrounding rock control for coal road mining. In particular, it relates to a method for sealing and grouting water-blocking reinforcement for anchor cable holes in the water-spraying area of ​​roadways. Background technique [0002] In the process of mining and supporting of coal mine roadway, supporting forms such as bolt (cable) support, bolt-injection support, full-anchor-cable support, and anchor-cable and bolt-injection combined support have been widely used in various coal mine roadways. . Among them, after some coal mine roadways are supported by bolts and cables, the roof of the roadway is prone to dripping and water leakage from the anchor cable holes; there is an aquifer in the upper part of some roadways. It will continue to flow out along the anchor cable hole, and the roof of the roadway will form a water-spraying area under the water-conducting action of the steel belt or the steel joist....

AI Technical Summary

Problems solved by technology

[0003] Aiming at the water leakage problem of the existing anchor cable holes in the water spraying area of ​​the roadway, because the existing anchor cable holes are difficult to disassemble after normal anchoring and pre-tightening, there is currently no effective method for grouting the anchor cable holes, resulting in Long-term watering will cause the surrounding rock to expand and become soft, accelerate the corrosion of the anchor cable, reduce the anchoring force of the anchor cable, and seriously affect the safety, stability and normal production inside the roadway

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