Expansion type multi-grade pressurized rapid hole sealing technology

Abstract

The invention relates to an expansion type multi-grade pressurized rapid hole sealing technology. A device adopted by the expansion type multi-grade pressurized rapid hole sealing technology is provided with a tubular extraction pipe; an extraction pipe plug is arranged at the top of the extraction pipe; a hole-sealing blossom cup is arranged at the front end of the extraction pipe; the extraction pipe is provided with a plurality of expansion type hole sealing bags from front to back; the expansion type hole sealing bags are arranged at intervals by macromolecular foaming materials I; macromolecular foaming materials II are arranged at the opening of an extraction drilled hole; a tubular slurry filling pipe I and a slurry discharging pipe pass through the macromolecular foaming materials II to extend into a sealed space of a hole sealing section; and a tubular slurry filling pipe II sequentially passes through the macromolecular foaming materials II, the sealed space of the hole sealing section and the macromolecular foaming materials I to enter the expansion type hole sealing bags. The pressurized rapid hole sealing technology disclosed by the invention can be used for plugging coal layer fractures for multiple times and does not influence normal gas extraction from the drilled hole when the hole sealing is carried out for two or more times, so that the effect of extracting the gas by the drilled hole is effectively improved and the extraction time is prolonged; and the whole extraction process is convenient and reliable, and the cost is low.

Description

technical field [0001] The invention relates to a pressure fast sealing technology suitable for mine gas drainage, especially an expansion type multi-stage pressure fast sealing technology that can effectively improve the sealing effect of drainage drilling, increase the concentration of gas drainage and prolong the drainage time. Sealing technology. Background technique [0002] With the extension of mine mining depth, most mines gradually change from gas mines to high gas or even outburst mines, and gas has become one of the main factors restricting the development of mining areas. The key to gas control is to use the gas drainage system to extract coal seam gas, and the quality of drainage drilling and sealing is the most important factor determining the drainage effect. Therefore, how to improve the sealing quality of drainage drilling is still an urgent problem to be solved. Due to the complex occurrence conditions of coal seams and poor air permeability, the "polymer...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low gas drainage concentration, short drilling service life or high cost existing in existing gas drainage devices, the present invention provides an expansive multi-stage pressurized rapid hole sealing technology. The drainage drilling and sealing of the fast sealing technology are divided into multiple sealings. After the first drilling is completed with cement mixed slurry and the gas is drained for a period of time, the gas can be drained for a period of time without affecting the normal drainage. The pre-installed inflatable sealing bag at the front end of the primary sealing section is injected with foam material for the secondary sealing to implement the second pressure sealing, and the third or more pressure sealing can be performed flexibly according to the needs , this technology can seal coal seam fissures many times, and the second or multiple times of sealing will not affect the normal gas drainage of the borehole, thereby effectively improving the gas drainage effect of the borehole and prolonging the extraction time, and the service life of the borehole The whole drainage process is simple and reliable, and the cost is low, which brings great convenience to gas drainage

Images