Gas pumping fixing occluder and use method thereof

Abstract

The invention discloses a gas pumping fixing occluder and a use method thereof. A three-hole pipe penetrates through three bags, a recyclable grouting pipe is communicated with a grouting channel of the three-hole pipe by a drainage device; a gas leaking handling pipe is communicated with a gas leaking handling channel of the three-hole pipe by a drainage device; a grouting hole of the drainage device and a grouting communicating small hole of the three-hole pipe are coaxial by a grouting small hole; a gas leaking handling hole of the drainage device and a gas leaking handling communicating small hole of the three-hole pipe are coaxial by a gas leaking handling small hole; check valves are arranged at the grouting channel in the three bags; a pressure check valve is mounted on the grouting channel between the No.2 bag and the No.3 bag. According to the gas pumping fixing occluder and the use method thereof, more effective grouting sealing can be realized on drill holes of a hole sealing section, generation of coal wall seams around drill holes at the hole sealing section can be more effectively avoided, and the occluder can also fill extremely small coal seams, so the hole sealing effect is optimal.

Description

technical field [0001] The invention relates to a gas extraction fixed plugging device and its use method, which is especially suitable for underground coal mines [0002] A hole sealing device for permanently sealing holes drilled in this coal seam. Background technique [0003] There are many methods for underground gas drainage equipment in coal mines in my country, most of which are to carry out a section of hole sealing treatment at a certain distance from the borehole. Borehole sealing for underground gas drainage in coal mines is divided into permanent sealing and temporary sealing. At present, the known permanent sealing uses foamed polyurethane, foamed cement and other foaming materials as the sealing material. Temporary hole sealing for gas drainage is usually sealed by mechanical hole sealing device. The applicant's inventions of "Bag Grouting Sealing Method and Its Hole Sealing Method" (ZL200710054384.5) and "Split Flow Grouting Sealing Device and Sealing Met...

AI Technical Summary

Problems solved by technology

However, as the extraction time goes by, the concentration of coal mine gas extraction gradually decays

Due to the release of the elastic potential of the coal body and the reduction of the gas pressure and gas content in the coal seam, the coal seam is displaced and deformed, and the voids around the drill hole are gradually developed and expanded. The hole is sealed tightly, and there is a phenomenon of air leakage

At present, the "bag type grouting sealing method and its sealing method" (ZL200710054384.5) and the "gas drainage center split grouting sealing device and sealing method" (ZL201110120920.3) invented by the applicant cannot To achieve the ideal sealing effect

In addition, due to the relatively large differences in coal quality in various coal mines, hole collapse often occurs, resulting in the failure of plugging devices with large diameters to be inserted into coal seam boreholes smoothly.

Have a certain impact on the sealing hole

In addition, the occluder mentioned above cannot be used for post-leakage treatment, and the processing is more complicated and the cost is more expensive

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