Coal bed gas extraction hole drilling viscose liquid dynamic recyclable hole sealing device and coal bed gas extraction hole drilling viscose liquid dynamic recyclable hole sealing method

A technology for drilling and coal seam gas drainage, applied in gas discharge, safety devices, mining equipment, etc., can solve the problems of long sealing time, difficult infiltration, poor permeability, etc., achieve simple design, improve gas drainage efficiency, well-structured effects

Pending Publication Date: 2019-03-19
CCTEG SHENYANG RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The gas drainage technology of the coal seam in high-gas mines is an important technical means to reduce the gas gushing out of the working face during the mining period. For the polyurethane sealing method and the "two plugging and one injection" sealing method, the sealing materials are mainly cement mortar and polyurethane. In

Method used

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  • Coal bed gas extraction hole drilling viscose liquid dynamic recyclable hole sealing device and coal bed gas extraction hole drilling viscose liquid dynamic recyclable hole sealing method
  • Coal bed gas extraction hole drilling viscose liquid dynamic recyclable hole sealing device and coal bed gas extraction hole drilling viscose liquid dynamic recyclable hole sealing method
  • Coal bed gas extraction hole drilling viscose liquid dynamic recyclable hole sealing device and coal bed gas extraction hole drilling viscose liquid dynamic recyclable hole sealing method

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Experimental program
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Effect test

Embodiment 1

[0029] Such as Figure 1-Figure 3 As shown, this embodiment provides a dynamic recyclable hole sealing device for drilling mucus in coal seam 16 gas drainage, which is used to seal the borehole section in coal seam 16, including dynamic grouting system I and static sealing system II, The static sealing system II includes three second high-pressure hoses, orifice expansion capsule 11, hole end expansion capsule 14 and sealing tube 13, wherein the sealing tube 13 is placed in the borehole, orifice expansion capsule 11 and hole end The expansion capsules 14 are set at intervals and set outside the sealing tube 13, the side of the expansion capsule 14 at the end of the hole close to the hole is the plugging section, the first ends of the three second high-pressure hoses are all free ends, and the three second high-pressure flexible hoses are free ends. The second end of the tube is respectively connected to the expansion capsule 11 at the orifice, the expansion capsule 14 at the e...

Embodiment 2

[0037] This embodiment provides a method for dynamically recyclable hole sealing of coal seam 16 gas drainage drilling mucus, using the coal seam 16 gas drainage drilling mucus dynamic recyclable sealing device as in Example 1, including the following steps,

[0038] Step 1. Connect the two middle hoses 12 with the orifice expansion capsule 11 and the hole end expansion capsule 14 respectively before sealing the hole, and set the orifice expansion capsule 11 and the hole end expansion capsule 14 on the sealing tube 13;

[0039] Step 2, send the connected orifice expansion capsule 11, the hole end expansion capsule 14 and the hole sealing tube 13 into the drilling hole sealing section 15;

[0040] Step 3, place the glue feeding hose 3 at the bottom of the liquid storage container 2, the liquid storage container 2 is filled with viscous colloid, and connect the glue feeding hose 3 and the pressurized glue injection pump 7;

[0041] Step 4, connect the pressurized glue injection ...

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Abstract

The invention relates to the technical field of coal and gas exploitation, and discloses a coal bed gas extraction hole drilling viscose liquid dynamic recyclable hole sealing device. The coal bed gasextraction hole drilling viscose liquid dynamic recyclable hole sealing device is used for blocking orifice sections of drilled holes in a coal bed, and is characterized in that second ends of 3 high-pressure hoses are connected with an orifice expansion capsule, a hole tail-end expansion capsule and a blocking section, a dynamic grouting system is connected with first ends of the 3 second high-pressure hoses in a switchable manner, and blocking adhesive can be injected into the orifice expansion capsule, the hole tail-end expansion capsule or the blocking section by the dynamic grouting system; the outer walls of the orifice expansion capsule and the hole tail-end expansion capsule are elastic walls, the orifice expansion capsule and the hole tail-end expansion capsule can be expanded after the blocking adhesive is injected, gaps between the inner walls of the drilled holes and the outer wall of a hole sealing pipe further can be blocked, and gaps between the inner walls of the drilled holes and the outer wall of the hole sealing pipe can be filled after the blocking adhesive is injected into the blocking section. The invention further provides a coal bed gas extraction hole drilling viscose liquid dynamic recyclable hole sealing method.

Description

technical field [0001] The invention relates to the technical field of coal and gas mining, in particular to the coal seam gas drainage drilling plugging technology. Background technique [0002] As coal resources in shallow low-gas areas are gradually exhausted, underground coal mines will extend to high-gas areas of coalfields. Document No. 163 [2011] "Provisional Provisions on Reaching the Standards of Coal Mine Gas Drainage" clearly stipulates the mandatory provisions for meeting the standards of gas drainage in coal seams. [0003] The gas drainage technology of the coal seam in high-gas mines is an important technical means to reduce the gas gushing out of the working face during the mining period. For the polyurethane sealing method and the "two plugging and one injection" sealing method, the sealing materials are mainly cement mortar and polyurethane. Infiltrate into the micro-cracks around the borehole; these hole sealing methods all have the problem that after th...

Claims

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Application Information

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IPC IPC(8): E21B33/13E21F7/00
CPCE21B33/13E21F7/00
Inventor 雷云张兴华孙亮闫循强邹永洺粱忠秋潘竞涛刘扬贾男刘飞张辉王祎
Owner CCTEG SHENYANG RES INST
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