Anti-slip hole sealing method for gas extraction drill hole of underground bottom drainage roadway

A technology of gas drainage and bottom drainage roadway, which is applied in the direction of gas discharge, mining equipment, earthwork drilling, etc., and can solve the problems of affecting the efficiency and effect of gas extraction, the inability to insert the hole sealer smoothly, and increasing the workload of workers, etc. Achieve the effect of simple structure, improved sealing effect, and improved pressure bearing performance

Pending Publication Date: 2022-02-11
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] After the construction of gas drainage drilling in the bottom drainage roadway, in order to ensure the smooth progress of gas drainage, the intubation and sealing of the holes must be carried out immediately. The hole is easy to collapse and the hole sealer cannot be inserted smoothly, and the drilled hole is easy to be scrapped
However, the hole sealers used in the bottom pumping tunnels of coal mines are generally longer in length. If a single hole is drilled and inserted immediately after the hole is formed, when the hole sealers are inserted into the upward holes in the bottom pumping tunnel, due to the larger self-weight of the hole sealers If no measures are taken, it is easy to slip off by itself. For example, insert a hole sealer for grouting immediately after a single hole is formed, and then clean the grouting pump immediately after grouting for each hole, which increases the workload of workers, reduces efficiency, and affects gas extraction. Efficiency and effectiveness and normal mining succession

Method used

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  • Anti-slip hole sealing method for gas extraction drill hole of underground bottom drainage roadway
  • Anti-slip hole sealing method for gas extraction drill hole of underground bottom drainage roadway
  • Anti-slip hole sealing method for gas extraction drill hole of underground bottom drainage roadway

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment one: if Figure 1-4 As shown, the gas drainage drilling method of the present invention comprises the following steps:

[0044] (1) In the bottom pumping roadway, use drilling rigs to drill holes in the upper coal seam at different angles;

[0045] (2) Install the upper colloidal fetal sac 3 and the lower colloidal fetal sac 2 on the extraction pipe 1, penetrate the grouting pipe on the upper colloidal fetal sac 3 and the lower colloidal fetal sac 2, and assemble it into an anti-slip fetal sac sealer ;

[0046] (3) Insert the anti-slip tire bag sealer into the drilled hole;

[0047] (4) Connect the front port of the grouting pipe of the anti-slip tire bag sealer to the grouting pump, and inject grout into the anti-slip tire bag sealer. The tire bladder 2 expands and squeezes the hole wall of the drilled hole, and the anti-slip tire bladder sealer is suspended in the drilled hole under the friction between the colloid tire bladder and the drilled hole wall;...

Embodiment 2

[0058] Embodiment two: if Figure 5-Figure 8 As shown, the gas drainage drilling method of the present invention comprises the following steps:

[0059] (1) In the bottom pumping roadway, use drilling rigs to drill holes in the upper coal seam at different angles;

[0060] (2) Install the upper colloidal fetal sac 3 and the lower colloidal fetal sac 2 on the extraction pipe 1, penetrate the grouting pipe on the upper colloidal fetal sac 3 and the lower colloidal fetal sac 2, and assemble it into an anti-slip fetal sac sealer ;

[0061] (3) Insert the anti-slip tire bag sealer into the drilled hole;

[0062] (4) Connect the front port of the grouting pipe of the anti-slip tire bag sealer to the grouting pump, and inject grout into the anti-slip tire bag sealer. The tire bladder 2 expands and squeezes the hole wall of the drilled hole, and the anti-slip tire bladder sealer is suspended in the drilled hole under the friction between the colloid tire bladder and the drilled hol...

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Abstract

The invention relates to an anti-slip hole sealing method for a gas extraction drill hole of an underground bottom drainage roadway. The method comprises the following steps of (1) constructing a layer-crossing drill hole; (2) assembling to form an anti-slip foetal sac hole packer; (3) inserting the anti-slip tire bag hole packer into the drill hole; (4) grouting the anti-slip tire bag hole packer, wherein the anti-slip tire bag hole packer is hung in the drill hole under the action of friction force between the rubber tire bag and the wall of the drill hole; and (5) an annular cavity between an upper rubber body tire bag and a lower rubber body tire bag continuing to be grouted, and grouting hole sealing operation being completed. According to the method, after drilling construction is completed and the extraction pipe and the hole packer are inserted into the drill hole, the hole sealing medium is injected into the rubber tire bag through the grouting pipe, and under extrusion of the pressure medium and the wall of the drill hole, a hole packer tire bag supports the drill hole and is embedded into the wall of the drill hole, so an extraction pipe is not prone to sliding, and the hole sealing effect is further improved through improvement of the sealing structure of the rubber tire bag.

Description

technical field [0001] The invention belongs to the technical field of gas drainage in coal mines, and in particular relates to an anti-slip sealing method for gas drainage drilling holes in underground bottom drainage lanes. Background technique [0002] After the construction of gas drainage drilling in the bottom drainage roadway, in order to ensure the smooth progress of gas drainage, the intubation and sealing of the holes must be carried out immediately. The hole is easy to collapse and the hole sealer cannot be inserted smoothly, and the drilled hole is easy to be scrapped. However, the hole sealers used in the bottom pumping tunnels of coal mines are generally longer in length. If a single hole is drilled and inserted immediately after the hole is formed, when the hole sealers are inserted into the upward holes in the bottom pumping tunnel, due to the larger self-weight of the hole sealers If no measures are taken, it is easy to slip off by itself. For example, inse...

Claims

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Application Information

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IPC IPC(8): E21B33/13E21F7/00
CPCE21B33/13E21F7/00
Inventor 王振锋王宇王峰杨钦王永龙白志强魏民涛谢文强
Owner HENAN POLYTECHNIC UNIV
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