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A coal mine gas extraction device and its application method

A technology for well gas and coal mines, which is applied to the field of coal mine gas extraction devices, can solve problems such as safety accidents due to excessive gas concentration, and achieve the effects of improving safety factor and improving extraction efficiency.

Inactive Publication Date: 2016-10-19
陈宝宝
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a coal mine gas extraction device and its use method, to solve the serious safety accidents caused by excessive gas concentration in the coal mine, and to improve the safety factor of underground operations

Method used

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  • A coal mine gas extraction device and its application method
  • A coal mine gas extraction device and its application method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like Figures 1 to 2 As shown, this embodiment includes a hollow support cylinder 4 and a moving rod 15 slidingly arranged in the support cylinder 4. A plurality of hollow extension cylinders 12 are hinged on both sides of the movement rod 15. The extension cylinders The inside of 12 communicates with the inside of the moving rod 15. A plurality of movable holes 3 are provided on both sides of the support tube 4. The movable end of the extension column 12 passes through the movable hole 3 and is placed in the pressure relief coal seam 2. The extension column 12 is up and down. A foaming tube 13 communicating with the polyurethane foaming machine 11 is installed on the inner wall, and a plurality of through holes 18 are opened on the outer wall of the extension cylinder 12, and small holes corresponding to the through holes 18 are opened on the foaming tube 13; Also include absorption pipe 17, one end of said absorption pipe 17 runs through the middle part of the extensi...

Embodiment 2

[0039] like Figures 1 to 2As shown, this embodiment includes the following steps,

[0040] (A) Open multiple rectangular foundation pits for gas extraction in the pressure relief coal seam 2 under the original coal seam 1;

[0041] (B) Place the support cylinder 4 in the coal mine shaft, and at the same time make the extension column 12 horizontally placed in the rectangular foundation pit;

[0042] (C) The polyurethane foaming machine 11 starts to inject polyurethane plastic foam into the foaming tube 13 under the action of the pressure pump 8, and the gap between the rectangular foundation pit and the extension column 12 is completely sealed by the polyurethane plastic foam passing through the through hole 18 ;

[0043] (D) Measure the oxygen content in the rectangular foundation pit by extending the oxygen concentration probe 14 at the end of the cylinder 12. When the oxygen concentration is greater than or equal to 12%, the gas storage tank 9 starts to inject the mixed ...

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Abstract

The invention discloses a coal mine well gas extraction device and a use method thereof. The coal mine well gas extraction device comprises a supporting barrel and a movable rod. Multiple hollow extending cylinders are hinged to the two sides of the movable rod. The inner portions of the extending cylinders are communicated with the inner portion of the movable rod. Multiple movement holes are formed in the two sides of the supporting barrel. Foaming pipes are installed on the upper inner walls and the lower inner walls of the extending cylinders. Multiple through holes are formed in the outer walls of the extending cylinders. Small holes corresponding to the through holes are formed in the foaming pipes. One end of each absorption pipe penetrates through the middle portion, arranged in a pressure relief coal seam, of the corresponding extending cylinder. Filter heads are installed at the ends of the absorption pipes. The other ends of the absorption pipes are communicated with a collection tank through a draught fan. Through the pressure change of the front side and the rear side in a rectangular foundation pit, the state of gas in a coal mine seam is changed into the dynamic state from the static state, the gas moves in a reciprocating mode at a certain degree on the coal mine seam and is finally absorbed out through the absorption pipes, and the gas extraction efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of coal mining, in particular to a coal mine gas extraction device and a method for using the same. Background technique [0002] There are many reasons for gas accumulation in coal mines, but the main reasons for gas accumulation are unreasonable ventilation system and poor management of local ventilation. For example, among the 34 major gas explosion accidents in 2014, 22 were mainly due to the unreasonable ventilation system, short circuit of air flow, multiple series connection and circulating air, resulting in insufficient air volume at the air supply site, which caused gas accumulation; 9 of them were mainly due to The location of the local ventilator is improperly installed, and the air duct does not extend to the air supply point or falls off, resulting in insufficient effective air volume at the air supply point, resulting in gas accumulation; 2 accidents were mainly caused by gas accumulation caused by power...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F7/00
CPCE21F7/00
Inventor 王肇东王春雷陈宝宝宁静郭玉辉
Owner 陈宝宝