Double cloth bags type grouting sealing set and method

Abstract

Disclosed is a double cloth bags type grouting sealing set and method. The double cloth bags type grouting sealing set consists of a grouting device and a double cloth bags sealing device. The grouting device comprises a double-liquid equivalent grouting pump, a stirring barrel, a mixer and a rubber pipe. The double cloth bags sealing device is composed of a shallow grouting cloth bag, a deep grouting cloth bag, a rubber pipe and the like. Two grouting cloth bags encase a gas drainage pipe, a grouting and outlet line is connected, the parts are connected through quick connectors, a high hydraulic material grout mixed well is charged in, the high hydraulic material grout is charged into the shallow grouting cloth bag in a borehole after grouting is stopped, and after the grout in the two cloth bags solidifies and seals the borehole, the high hydraulic material grout is finally continuously charged into a hollow borehole between the two cloth bags through a hollow grouting pipe. Construction steps are simple, operation is convenient, the cost is low, and sealing effect is good.

Description

technical field [0001] The invention relates to a grouting hole sealing device and a method thereof, in particular to a double-bag type grouting hole sealing device and a method thereof which are suitable for permanent hole sealing of coal seam drainage drilling holes in an underground coal mine. Background technique [0002] In order to curb the occurrence of gas accidents in coal mines, high-gas mines in my country mainly adopt drilling drainage to control gas disasters. The key technology is the sealing effect of drilling holes. The quality of sealing holes directly affects the concentration of gas drainage, orifice load Pressure, or even the drainage effect of the entire drilling field, restricts the performance of drainage drilling. According to statistics, about 2 / 3 of the gas drainage boreholes in my country have poor sealing quality. At present, the hole sealing methods used in mines at home and abroad mainly include polyurethane hole sealing and "two plugs and one i...

AI Technical Summary

Problems solved by technology

According to statistics, about 2 / 3 of the gas drainage boreholes in my country have poor sealing quality

At present, the hole sealing methods used in mines at home and abroad mainly include polyurethane hole sealing and "two plugs and one injection" hole sealing. Among them, the polyurethane material has a better sealing effect in the early stage, and in the later stage, with the expansion of drilling cracks and the shrinkage of the material volume, it is easy to produce The secondary air leakage channel cannot achieve long-term sealing of the borehole and the cost is high; the "two plugging and one injection" sealing method prolongs the service cycle of the drainage borehole to a certain extent, but it is difficult to overcome the slow sealing speed and the material There are problems such as large demand, complex sealing process, and difficult positioning of the sealing hole, and there is also a problem that the performance of the sealing equipment does not match the requirements of the construction process parameters.

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