CN204402550U - A kind of hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal device - Google Patents
A kind of hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal device Download PDFInfo
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- CN204402550U CN204402550U CN201420697737.9U CN201420697737U CN204402550U CN 204402550 U CN204402550 U CN 204402550U CN 201420697737 U CN201420697737 U CN 201420697737U CN 204402550 U CN204402550 U CN 204402550U
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Abstract
The utility model discloses a kind of hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal device, comprise rig, drainage tube, gas pumping bypass duct, gas pumping gathering tube, gas phase fracturing device, pouch, sealing of hole cement and gas pumping pump, rig comprises frame, drilling rod and drill bit, drilling rod is arranged in frame, drill bit is fixedly mounted on the top of drilling rod, drill bit is alloy tool steel bit, gas phase fracturing device is arranged in the boring of drilling machine construction, drainage tube is arranged on gas phase fracturing device and carries out in the boring of pressure break explosion, the junction of two sections of drainage tubes adopts fluid sealant to be connected and sealed, the tube wall foremost of drainage tube radially offers multiple drainage holes, gas pumping bypass duct connects mash gas pumping drilling and gas phase pressure break hole, gas pumping bypass duct all unification is connected on gas pumping gathering tube, gas pumping gathering tube is connected to by pit shaft on the gas pumping pump in the pumping plant on ground.
Description
Technical field
The utility model relates to a kind of hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal device.
Background technology
Pit shaft exposed coal refers to that pit shaft is exploited to distance coal seam method and enters base plate method apart from the whole developing processes being greater than 2m at a distance of beyond 10m to opening coal seam.Pit shaft exposed coal work plane has competent bed to enter suddenly comparatively soft seam and extending stress band to change to some extent and easily coal and gas prominent accident occurs.So need to carry out gas pumping, reached exposed coal index, but owing to entering coal seam for the first time, coal-bed gas pressure is large, the low extraction difficulty of gas permeability is large, and the extraction cycle is long, has a strong impact on exposed coal progress.
Easily there is outstanding accident in pit shaft exposed coal, brings serious impact to the safety in production of mine.Therefore, pit shaft exposed coal needs to carry out extinction measure.Prevent the direct measure of pit shaft exposed coal Gas Outburst from being take out coal-bed gas in advance to coal seam drilling at present.
The weak point of above-mentioned pit shaft exposed coal measure is:
One, drilling takes out the scope that coal-bed gas needs 12m beyond control well barrel in advance, and required drilling hole amount is many, and by the limitation of shaft section, difficulty of construction is large.
Two, low permeability coal seam, effective extraction radius is little, and the required extraction cycle is long, affects manufacturing schedule, cost of increasing input.
Utility model content
The purpose of this utility model provides a kind of method of new low permeability coal seam pit shaft rapid uncovering coal just for the weak point existed in above-mentioned technology.The method can reduce extraction borehole quantity, increases gas permeability of coal seam, fast and safely can open coal seam.
The purpose of this utility model can be realized by subordinate's technical measures:
Method of the present utility model comprises subordinate's step:
The first step, Shaft Excavation in hypotonic seam area starts to arrange mash gas pumping drilling to apart from during roof 7m, according to shaft section size, multiple mash gas pumping drilling is arranged according to cellular orthohexagonal mode, the distance of every two adjacent mash gas pumping drillings is 70cm, and the diameter of mash gas pumping drilling is 50mm;
Second step, the multiple cellular orthohexagonal center arrangement gas phase pressure break hole formed in gas pumping hole, gas phase pressure break hole adopts SGZX-3 rig, drilling rod φ 50mm, drill bit φ 94mm, and gas phase pressure break hole and gas pumping hole axially be arranged in parallel;
3rd step, after the construction of gas phase pressure break hole drilling, in each gas phase pressure break hole, gas phase fracturing device is set, open gas phase fracturing device, due to the abrupt release of gases at high pressure, produce huge energy, the inwall in gas phase pressure break hole produces many cracks, increase the permeability in coal seam, then the complete gas phase fracturing device of work is taken out in gas phase pressure break hole;
4th step, in gas phase pressure break hole, arrange caliber is that the pvc pipe of 50mm is as drainage tube, the junction of two sections of drainage tubes adopts fluid sealant to be connected and sealed simultaneously, the tube wall foremost of drainage tube radially offers multiple drainage holes, drainage holes adopts the mode of random distribution to be arranged on the tube wall of drainage tube, part between drainage tube outer wall and gas phase pressure break hole inwall adopts pouch and sealing of hole cement to carry out sealing of hole sealing, sealed borehole length is 5m, pouch head is pushed between drainage tube outer wall and gas phase pressure break hole inwall in advance, then inflated by the pouch gas tube of pouch afterbody, the length of pouch gas tube is greater than 5m, thus the inflation inlet of pouch gas tube can be made to be exposed at the outside in gas phase pressure break hole, sealing of hole cement is cast in the rear portion of pouch until the aperture place in gas phase pressure break hole,
5th step, at sealing of hole after hours, the multiple mash gas pumping drillings be located along the same line are connected by a gas pumping bypass duct, the multiple gas phase pressure break holes be located along the same line are connected by another gas pumping bypass duct simultaneously, connect mash gas pumping drilling and gas phase pressure break hole and multiple gas pumping bypass duct be parallel to each other of being formed all unification be connected on gas pumping gathering tube, gas pumping gathering tube is connected on the gas pumping pump in the pumping plant on ground by pit shaft;
6th step, opens the valve of gas pumping gathering tube in ground pump station, completes gas pumping work by the high negative pressure of ground pump station.
Provide the device realizing above-mentioned hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal method simultaneously, comprise rig, drainage tube, gas pumping bypass duct, gas pumping gathering tube, gas phase fracturing device, pouch, sealing of hole cement and gas pumping pump, rig comprises frame, drilling rod and drill bit, drilling rod is arranged in frame, drill bit is fixedly mounted on the top of drilling rod, drill bit is alloy tool steel bit, gas phase fracturing device is arranged in the boring of drilling machine construction, drainage tube is arranged on gas phase fracturing device and carries out in the boring of pressure break explosion, the pvc pipe of drainage tube to be caliber be 50mm, the junction of two sections of drainage tubes adopts fluid sealant to be connected and sealed, the tube wall foremost of drainage tube radially offers multiple drainage holes, drainage holes adopts the mode of random distribution to be arranged on the tube wall of drainage tube, part between drainage tube outer wall and gas phase pressure break hole inwall adopts pouch and sealing of hole cement to carry out sealing of hole sealing, sealed borehole length is 5m, pouch is inflated by the pouch gas tube of pouch afterbody, the length of pouch gas tube is greater than 5m, sealing of hole cement is cast in the rear portion of pouch until the aperture place in gas phase pressure break hole, gas pumping bypass duct connects mash gas pumping drilling and gas phase pressure break hole, gas pumping bypass duct all unification is connected on gas pumping gathering tube, gas pumping gathering tube is connected on the gas pumping pump in the pumping plant on ground by pit shaft, drilling rod φ 50mm, drill bit φ 94mm.
The beneficial effects of the utility model are as follows:
1. arranged by boring, take out hole in advance at regular hexagon six angles, pressure break Kong center, effective anti-reflection coal seam, increase extraction efficiency, reduce the extraction time, effectively shorten the exposed coal time.
2. can reduce pre-draining borehole quantity while increasing gas permeability of coal seam, effectively save cost, be convenient to better management.
Accompanying drawing illustrates:
Fig. 1 is the utility model boring position plan view;
Fig. 2 is hole sealing structure schematic diagram;
Fig. 3 is grid-connected extraction pipeline connection diagram.
In figure: 1, well bore wall, 2, mash gas pumping drilling, 3, gas phase pressure break hole drilling, 4, drainage tube, 5, pouch, 6, sealing of hole cement, 7, pouch gas tube, 8, coal seam, 9, gas pumping bypass duct, 10, gas pumping gathering tube, 11, valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described further.
As Figure 1-3, the device of a kind of hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal method, comprise rig, drainage tube 4, gas pumping bypass duct 9, gas pumping gathering tube 10, gas phase fracturing device, pouch 5, sealing of hole cement 6 and gas pumping pump, gas phase fracturing device is arranged in the boring of drilling machine construction, drainage tube 4 is arranged on gas phase fracturing device and carries out in the boring of pressure break explosion, drainage tube 4 for caliber be the pvc pipe of 50mm, the junction of two sections of drainage tubes adopts fluid sealant to be connected and sealed, the tube wall foremost of drainage tube radially offers multiple drainage holes, drainage holes adopts the mode of random distribution to be arranged on the tube wall of drainage tube, part between drainage tube outer wall and gas phase pressure break hole inwall adopts pouch 5 and sealing of hole cement 6 to carry out sealing of hole sealing, sealed borehole length is 5m, pouch 5 is inflated by the pouch gas tube 7 of pouch afterbody, the length of pouch gas tube is greater than 5m, sealing of hole cement is cast in the rear portion of pouch until the aperture place in gas phase pressure break hole, gas pumping bypass duct connects mash gas pumping drilling and gas phase pressure break hole, gas pumping bypass duct all unification is connected on gas pumping gathering tube 10, gas pumping gathering tube is connected on the gas pumping pump in the pumping plant on ground by pit shaft, drilling rod φ 50mm, drill bit φ 94mm.
Claims (2)
1. a hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal device, comprise rig, drainage tube, gas pumping bypass duct, gas pumping gathering tube, gas phase fracturing device, pouch, sealing of hole cement and gas pumping pump, described rig comprises frame, drilling rod and drill bit, described drilling rod is arranged in described frame, described drill bit is fixedly mounted on the top of described drilling rod, described drill bit is alloy tool steel bit, described gas phase fracturing device is arranged in the boring of drilling machine construction, described drainage tube is arranged on described gas phase fracturing device and carries out in the boring of pressure break explosion, the pvc pipe of described drainage tube to be caliber be 50mm, the junction of two sections of drainage tubes adopts fluid sealant to be connected and sealed, the tube wall foremost of described drainage tube radially offers multiple drainage holes, drainage holes adopts the mode of random distribution to be arranged on the tube wall of drainage tube, part between drainage tube outer wall and gas phase pressure break hole inwall adopts pouch and sealing of hole cement to carry out sealing of hole sealing, sealed borehole length is 5m, described pouch is inflated by the pouch gas tube of pouch afterbody, the length of pouch gas tube is greater than 5m, described sealing of hole cement is cast in the rear portion of pouch until the aperture place in gas phase pressure break hole, described gas pumping bypass duct connects mash gas pumping drilling and gas phase pressure break hole, and gas pumping bypass duct all unification is connected on gas pumping gathering tube, and gas pumping gathering tube is connected to by pit shaft on the gas pumping pump in the pumping plant on ground.
2. one according to claim 1 hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal device, is characterized in that: described drilling rod φ 50mm, drill bit φ 94mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420697737.9U CN204402550U (en) | 2014-11-18 | 2014-11-18 | A kind of hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420697737.9U CN204402550U (en) | 2014-11-18 | 2014-11-18 | A kind of hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal device |
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| Publication Number | Publication Date |
|---|---|
| CN204402550U true CN204402550U (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420697737.9U Expired - Fee Related CN204402550U (en) | 2014-11-18 | 2014-11-18 | A kind of hypotonic seam area pit shaft gas phase pressure break rapid uncovering coal device |
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| Country | Link |
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| CN (1) | CN204402550U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100664A (en) * | 2017-05-10 | 2017-08-29 | 河南理工大学 | A kind of hot cold alternating breaks coal permeability-increasing gas enhanced gas extraction System and method for |
-
2014
- 2014-11-18 CN CN201420697737.9U patent/CN204402550U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107100664A (en) * | 2017-05-10 | 2017-08-29 | 河南理工大学 | A kind of hot cold alternating breaks coal permeability-increasing gas enhanced gas extraction System and method for |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150617 Termination date: 20191118 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Junsheng Document name: Notice of termination of patent right |
|
| DD01 | Delivery of document by public notice |