CN102505929A - Device for increasing gas permeability of coal seam by utilizing centralized release of explosion energy - Google Patents
Device for increasing gas permeability of coal seam by utilizing centralized release of explosion energy Download PDFInfo
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- CN102505929A CN102505929A CN2011103618981A CN201110361898A CN102505929A CN 102505929 A CN102505929 A CN 102505929A CN 2011103618981 A CN2011103618981 A CN 2011103618981A CN 201110361898 A CN201110361898 A CN 201110361898A CN 102505929 A CN102505929 A CN 102505929A
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- hole
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- hole pipe
- coal seam
- gas permeability
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Abstract
The invention relates to a device for increasing gas permeability of a coal seam by utilizing centralized release of explosion energy. The device comprises a long cylindrical hole pipe, wherein more than three energy through holes in the equivalent size are formed on the pipe wall of the hole pipe in a spiral ascending arrangement way; the energy through holes are respectively arranged in the radial direction and the axial direction of the hole pipe at equal distances; two ends of the hole pipe are plugged and sealed by stemming; a cartridge and a detonator are mounted in the hole pipe, and the detonator is inserted into the cartridge and wound and fixed by a leg wire so as to prevent the detonator from shedding; and the surplus leg wire extends out of the bottom of the hole pipe for being used as a lead. The device for increasing the gas permeability of the coal seam by utilizing the centralized release of the explosion energy can increase cracks on the wall of a drilled hole by utilizing the principle of centralized release of energy after explosion of explosive, improve the gas permeability of the coal seam and the drainage efficiency of gas, save drainage time during the process of drilling the hole for gas drainage and enable the gas in the coal seam to achieve the standard pressure of exhaust as early as possible.
Description
Technical field
The present invention relates to the device that a kind of mine is used for increasing the gas permeability in coal seam, especially a kind ofly utilize explosion energy to concentrate to discharge the device that increases gas permeability of coal seam.
Background technology
The colliery that draws out methane is used for reducing the necessary means of gas disaster, and in China's highly gassy mine, it is the coal seam of gas permeability difference that considerable mine is arranged; In the process of gas drainage under suction, to spend long time; Short then several months, long then 1 year, influenced the progress of mining work greatly; And gas drainage efficiency is low, does not reach the purpose of extraction protrusion-dispelling.
Summary of the invention
Cause the halfway problem of gas drainage under suction in order to solve the ventilative difference in coal seam; The present invention proposes a kind of explosion energy that utilizes and concentrate the device that discharges the increase gas permeability of coal seam; Utilize concentration of energy discharges behind the explosive charge principle to increase the crack of drill hole wall, improve the gas permeability in coal seam, thereby improve the drainage efficient of gas; In the process of gas suction by drilling, save the extraction time, the normal pressure that coal-bed gas is arrived to extraction early.
The technical solution adopted for the present invention to solve the technical problems is: a kind of device that utilizes explosion energy to concentrate release to increase gas permeability of coal seam comprises stemming shutoff, energy through hole, hole pipe, powder stick, detonator, payment to a porter; This device has the hole pipe of an elongated cylindrical; On the tube wall of said hole pipe, have equal-sized energy through hole more than three with spiralling arrangement mode; Said energy through hole radially reaches axial equidistant setting respectively at hole pipe; Two of said hole pipe seals with the stemming shutoff; In the pipe of said hole powder stick and detonator are installed, said detonator inserts in the powder stick and with payment to a porter and is fastened, and comes off to prevent detonator; Unnecessary payment to a porter is stretched out as lead-in wire the pipe bottom from the hole.
The diameter of the above energy through hole is not more than 1/3 of hole pipe diameter.
The diameter of the above hole pipe is greater than the diameter of powder stick.
In use, explosive can produce lot of energy and be collected in the pipe of hole in the process of blast, because the space is less; Energy at first can discharge rapidly by never constrained energy through hole, and drill hole wall is on every side produced huge impact, makes drill hole wall produce tens centimeters long holes; Help forming between the boring netted communication; Make coal body produce a large amount of cracks simultaneously, increased the gas permeability of coal body greatly, unnecessary energy can be washed the stemming shutoff open.The hole pipe can support hole wall behind explosive charge, make drill hole wall can or not influence follow-up gas drainage under suction owing to vibrations are collapsed, thereby reaches the purpose that improves gas drainage under suction efficient.
The invention has the beneficial effects as follows: this a kind of explosion energy that utilizes is concentrated the device that discharges the increase gas permeability of coal seam; Utilize concentration of energy discharges behind the explosive charge principle to increase the crack of drill hole wall; The gas permeability in coal seam and the drainage efficient of gas have been improved; In the process of gas suction by drilling, save the extraction time, make coal-bed gas reach the normal pressure that extraction is arrived early.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Accompanying drawing 1 is concentrated the structural principle sketch map that discharges the device that increases gas permeability of coal seam for a kind of explosion energy that utilizes.
Among the figure, 1. stemming shutoff, 2. energy through hole, 3. hole pipe, 4. powder stick, 5. detonator, 6. payment to a porter.
The specific embodiment
In accompanying drawing 1, a kind of device that utilizes explosion energy to concentrate release to increase gas permeability of coal seam comprises stemming shutoff 1, energy through hole 2, hole pipe 3, powder stick 4, detonator 5, payment to a porter 6; This device has the hole pipe 3 of an elongated cylindrical; On the tube wall of said hole pipe 3, have equal-sized energy through hole 2 more than three with spiralling arrangement mode; Said energy through hole 2 radially reaches axial equidistant setting respectively at hole pipe 3; Two of said hole pipe 3 is with stemming shutoff 1 sealing; In the said hole pipe 3 powder stick 4 and detonator 5 are installed, said detonator 5 inserts in the powder stick 4 and is fastened with payment to a porter 6, comes off to prevent detonator 5; Unnecessary payment to a porter 6 is managed 3 bottoms and is stretched out as lead-in wire from the hole.
The diameter of the above energy through hole 2 is not more than the hole and manages 1/3 of 3 diameters.
The diameter of the above hole pipe 3 is greater than the diameter of powder stick 4.
In use, explosive can produce lot of energy and be collected in the hole pipe 3 in the process of blast, because the space is less; Energy at first can discharge rapidly by never constrained energy through hole 2, and drill hole wall is on every side produced huge impact, makes drill hole wall produce tens centimeters long holes; Help forming between the boring netted communication; Make coal body produce a large amount of cracks simultaneously, increased the gas permeability of coal body greatly, unnecessary energy can be washed stemming shutoff 1 open.Hole pipe 3 can support hole wall behind explosive charge, make drill hole wall can or not influence follow-up gas drainage under suction owing to vibrations are collapsed, thereby reaches the purpose that improves gas drainage under suction efficient.
Claims (3)
1. one kind is utilized explosion energy to concentrate the device that discharges the increase gas permeability of coal seam, comprises stemming shutoff (1), energy through hole (2), hole pipe (3), powder stick (4), detonator (5), payment to a porter (6); This device has the hole pipe (3) of an elongated cylindrical; It is characterized in that: on the tube wall of said hole pipe (3), have equal-sized energy through hole (2) more than three with spiralling arrangement mode; Said energy through hole (2) radially reaches axial equidistant setting respectively at hole pipe (3); Two of said hole pipe (3) seals with stemming shutoff (1); In the said hole pipe (3) powder stick (4) and detonator (5) are installed, said detonator (5) inserts in the powder stick (4) and is fastened with payment to a porter (6), comes off to prevent detonator (5); Unnecessary payment to a porter (6) is stretched out as lead-in wire from hole pipe (3) bottom.
2. concentrate the device that discharges the increase gas permeability of coal seam according to the said a kind of explosion energy that utilizes of claim 1, it is characterized in that: the diameter of said energy through hole (2) is not more than 1/3 of hole pipe (3) diameter.
3. concentrate the device that discharges the increase gas permeability of coal seam according to the said a kind of explosion energy that utilizes of claim 1, it is characterized in that: the diameter of the above hole pipe (3) is greater than the diameter of powder stick (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103618981A CN102505929A (en) | 2011-11-16 | 2011-11-16 | Device for increasing gas permeability of coal seam by utilizing centralized release of explosion energy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103618981A CN102505929A (en) | 2011-11-16 | 2011-11-16 | Device for increasing gas permeability of coal seam by utilizing centralized release of explosion energy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102505929A true CN102505929A (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103618981A Pending CN102505929A (en) | 2011-11-16 | 2011-11-16 | Device for increasing gas permeability of coal seam by utilizing centralized release of explosion energy |
Country Status (1)
| Country | Link |
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| CN (1) | CN102505929A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817633A (en) * | 2012-09-13 | 2012-12-12 | 广东宏大爆破股份有限公司 | Device for draining gas by deep hole crack control blasting and precracking method |
-
2011
- 2011-11-16 CN CN2011103618981A patent/CN102505929A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102817633A (en) * | 2012-09-13 | 2012-12-12 | 广东宏大爆破股份有限公司 | Device for draining gas by deep hole crack control blasting and precracking method |
| CN102817633B (en) * | 2012-09-13 | 2016-05-11 | 广东宏大爆破股份有限公司 | The device drawing out methane and the pre-splitting method of the controlled blasting of deep hole crack |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120620 |