Passive up hole grouting hole sealing and check plug and grouting hole sealing method

Abstract

The invention discloses a passive up hole grouting hole sealing and check plug. The passive up hole grouting hole sealing and check plug comprises a connecting pipe for penetrating a pressure measuring pipe, and a round disc for blocking an up hole, the round disc is provided with a grouting through hole, a grout return through hole and a connecting through hole, the first end of the connecting pipe is connected with the wall of the connecting through hole, and the pipe wall close to the second end of the connecting pipe is symmetrically provided with two wedging seams coaxial with the connecting pipe. The invention also discloses a grouting hole sealing method through the passive up hole grouting hole sealing and check plug. The method comprises, after uniformly filling fabric coated with polyurethane into a passive up hole, sleeving the round disc onto the pressure measuring pipe, a grouting pipe and a grout return pipe correspondingly through the through holes, and then instantly binding and connecting the connecting pipe and the pressure measuring pipe. Due to the fact that the wedging seams provide the connecting pipe with certain elasticity, the connecting pipe and the pressure measuring pipe can be rapidly and stably connected together through the elasticity; by means of the characteristics of the pressure measuring pipe fixedly mounted inside the holes, the connecting pipe can press the round disc strongly, so that the polyurethane inside the holes can avoid leakage.

Description

technical field [0001] The invention relates to a grouting sealing device and a hole sealing method for an ascending hole, in particular to a passive grouting sealing hole check plug and a grouting sealing method for an ascending hole. Background technique [0002] Gas explosion and gas outburst are major mine disasters in current coal mine production. The "Coal Mine Safety Regulations" requires that the gas pressure of the coal seam should be measured before the high gas is exposed in the coal seam. In addition, according to Article 18 of the "Regulations on the Prevention and Control of Coal and Gas Outburst" (2009): "Non-outburst coal seams and When mining coal seams in high-gas mines, the gas pressure, gas content and other parameters related to outburst risks must be measured when the depth reaches or exceeds 50m or new mining areas are opened up. [0003] Passive pressure measurement method is widely used in the field of gas pressure measurement. The coal standard is...

AI Technical Summary

Problems solved by technology

The method currently used is to evenly fill the upward hole with fine veil balls or towels coated with polyurethane, the length of the sealing hole is greater than 1m, and then drive a wooden plug into the hole to tightly block the upward hole to prevent aggregation. The foaming and expansion pressure of the amine grease is too high and the hole is broken out, so that the sealing fails

[0028] In the field operation, the stability of the cork often does not meet the requirements, and the gap between the corks will be large. The polyurethane in the upward hole often overflows from the orifice after expansion, resulting in the failure of the orifice to seal the hole and the next step cannot be carried out. one step grouting work

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