CN205823322U - A kind of boring arrangement of coal seam high-pressure hydraulic slot pressure break - Google Patents
A kind of boring arrangement of coal seam high-pressure hydraulic slot pressure break Download PDFInfo
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- CN205823322U CN205823322U CN201620764216.XU CN201620764216U CN205823322U CN 205823322 U CN205823322 U CN 205823322U CN 201620764216 U CN201620764216 U CN 201620764216U CN 205823322 U CN205823322 U CN 205823322U
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- coal seam
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Abstract
This utility model provides the boring arrangement of a kind of coal seam high-pressure hydraulic slot pressure break, three row hole drillings are offered to direction, coal seam along its length in Di Chou lane, every row hole drilling all includes that the boring of multiple slot and multiple pressure breaks are holed, and wherein the tapping point of a row hole drilling is positioned at back；The tapping point of other two row hole drillings is respectively positioned on lane side；Two described slot borings it are provided with at equal intervals between adjacent two described pressure breaks boring of every row hole drilling.Boring arrangement described in the utility model, crosses the boring of appropriate design slot and the arrangement of pressure break boring and quantity, while improving extraction efficiency, decreases the quantity of pressure break boring, reduce cost.
Description
Technical field
This utility model belongs to Coal Mining Technology field, especially relates to the brill of a kind of coal seam high-pressure hydraulic slot pressure break
Hole arrangement.
Background technology
China's coal-mine mostly is high methane low-permeable mine, and gas accident accounts for the proportion of all kinds of major coal accidents of mine
Greatly, the loss caused mine is the most serious.Along with society's increase day by day to coal demand, improving constantly of producing capacity,
The trend that mining depth increases becomes clear day by day.Along with the seam mining degree of depth increases, coal-bed gas pressure increases, and gas bearing capacity increases
Greatly, coal seam permeability reduces, and projecting coal bed quantity is also in increasing trend, and coal and gas outburst mine increases the most therewith.Therefore,
It is necessary low-permeability coal seam gas enhanced gas extraction and stone door punching coal measure are studied further.
Technology that hydraulic slotted liner technique is anti-reflection is to utilize high-pressure spray slotting process slot discharge part coal body in boring, elimination
Stress is concentrated, and cracks the bottle neck effect that boring around produces, and forms the anti-reflection region of large range of release in boring, it is achieved that water
Defeat the controllability in crack propagation direction during splitting, simultaneously as coal body tensile strength reduces near gathering sill, thus reduce
Press off pressure, expand pressure break radius, increase relief range；But there is the shortcoming that effective coverage is little in hydraulic slotted liner technique.
Hydraulic fracturing technology is that in making coal body, initial fissure opens, and concurrently forms new crack, carries by injecting water under high pressure in coal body
The high breathability of coal body, its advantage is that coverage is bigger, but, it is wayward that fracturing also exists pressure break direction,
And easily form the problem well of stress raisers, it is unfavorable for the extraction of gas.In prior art, Publication No. CN
The patent of 104389631A discloses a kind of low air permeability coal seam slot and pressure break contract network anti-reflection method, by by slot
Boring intersects cooperative arrangement with pressure break boring, and holes pressure break and carry out staged fracturing, and expanding one borehole effectively affects model
Enclose, it is achieved that the efficient extraction of gas, but this technology has the disadvantage in that this complex process, actual underground construction, be difficult to operation.
Utility model content
For above-mentioned technical problem, the purpose of this utility model is to provide the brill of a kind of coal seam high-pressure hydraulic slot pressure break
Hole arrangement, to solve slot boring, coverage is little, the uppity problem of fracturing fracture propagation direction, it is achieved gas is high
Effect extraction, meanwhile, reduces the quantity of pressure break boring, thus reduces cost.
The technical solution adopted in the utility model is:
The boring arrangement of a kind of coal seam high-pressure hydraulic slot pressure break, along its length to coal seam side in Di Chou lane
To offering three row hole drillings, every row hole drilling all includes that the boring of multiple slot and multiple pressure breaks are holed, the wherein perforate of a row hole drilling
Point is positioned at back；The tapping point of other two row hole drillings is respectively positioned on lane side；Adjacent two described pressure breaks boring of every row hole drilling
Between be provided with the boring of two described slots at equal intervals.
The boring arrangement of coal seam described in the utility model high-pressure hydraulic slot pressure break, wherein, described in adjacent two
Arrange at equal intervals between slot boring or the boring of adjacent described slot and the boring of described pressure break.
The boring arrangement of coal seam described in the utility model high-pressure hydraulic slot pressure break, wherein, between adjacent boring
Distance be 10-12m.
This utility model beneficial effect:
The boring arrangement of high-pressure hydraulic slot pressure break described in the utility model, by appropriate design slot boring and
The arrangement of pressure break boring and quantity, while improving extraction efficiency, decrease the quantity of pressure break boring, reduce production
Cost.Can significantly improve the gas pumping amount of boring, the aspect such as another external economy, time all has and has an enormous advantage.For taking off
The anti-reflection offer of coal and coal seam is instructed, and provides technical guarantee for gas smelting reason.
Accompanying drawing explanation
Fig. 1 is that the drilling plane of high-pressure hydraulic slot pressure break coal seam described in the utility model anti-reflection method arranges schematic diagram；
Fig. 2 is that the boring facade of high-pressure hydraulic slot pressure break coal seam described in the utility model anti-reflection method arranges schematic diagram；
Fig. 3 is the high-pressure hydraulic slotting process system of high-pressure hydraulic slot pressure break coal seam described in the utility model anti-reflection method
Structural representation；
Fig. 4 is the high-pressure hydraulic slot fracturing technology system of high-pressure hydraulic slot pressure break coal seam of the present utility model anti-reflection method
The structural representation of system.
Below in conjunction with specific embodiments and the drawings, the utility model is described in further detail.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3 and Figure 4, a kind of boring for coal seam high-pressure hydraulic slot pressure break of the present embodiment is arranged
Structure, job location chooses certain work surface low level gas pumping tunnel, colliery 12408, in Di Chou lane 3 along its length to
Direction, coal seam 4 offers three row hole drillings, and every row hole drilling all includes multiple slot boring 1 and multiple pressure break boring 2, a wherein gang drill
The tapping point in hole is positioned at back, and 1m is helped in distance lane；The tapping point of other two row hole drillings is respectively positioned on lane side, away from roadway floor 5
Distance be 2m；Being provided with two slot borings 1 at equal intervals between adjacent two pressure breaks boring 2 of every row hole drilling, adjacent two are cut
Arrange at equal intervals between seam boring 1 or adjacent slot boring 1 and pressure break boring 2, the pressure break of adjacent two row hole drillings in three row hole drillings
Holing 2 non-conterminous, 2 dispersed placement so that multiple pressure break is holed, the distance between adjacent boring is 10-12m.
The present embodiment uses the boring arrangement of above-mentioned coal seam high-pressure hydraulic slot pressure break to carry out anti-reflection method, including
Following steps:
A () presses above-mentioned boring arrangement, each slot of constructing one by one boring 1 also uses high-pressure water jet to hole each slot
1 carries out high-pressure hydraulic slot, and the high pressure outlet side of high-pressure hydraulic pump 6 is passed sequentially through high-pressure rubber pipe 8 and swivel joint 14 and water-jet
One end of stream drilling rod 10 connects, and is fixedly installed on the other end of water jet drilling rod 10 equipped with the Water jet sprayer 11 of nozzle 12；With
Rig 15 drives water jet drilling rod 10 that Water jet sprayer 11 is delivered to slot and holed for 1 end, is then turned on rig 15, makes water jet bore
Bar 10 rotates with minimum speed；By adjustable cut-off valve 7, controlling fluidic system pressure, pressure is 25MPa, opens nozzle 12, right
The coal body of the hole wall of slot boring 1 carries out circumgyration incision, and water jet drilling rod 10 slowly moves back and forth in slot boring 1 simultaneously,
Control slot hole the scope of 1 slot section by changing the length of water jet drilling rod 10 in slot boring 1, form reaming boring
13, a diameter of 500mm of reaming boring 13, until completing slot operation, use sealing material 9 to carry out each slot boring 1 often
After rule sealing of hole operation, it is connected into methane gas extraction pipeline and carries out gas pumping；
B () presses above-mentioned boring arrangement, each pressure break of constructing one by one boring 2 also uses sealing material 9 to enter pressure break boring 2
Row sealing of hole, sealing material 9 is cement mortar, and after sealing of hole, described cement mortar need to solidify more than 72h；
C () carries out high-pressure hydraulic pressure break to each pressure break boring 2, by the high pressure outlet side of high-pressure hydraulic pump 6 by high-pressure rubber pipe 8
It is connected with one end of water jet drilling rod 10, the other end of water jet drilling rod 10 is delivered to pressure break and holed for 1 end, open high-pressure hydraulic pump 6,
Proceed by fracturing, by pump pressure slowly rise until pressure break boring 2 there are flowing out, make the neighbouring brill of pressure break boring 2 and surrounding
Between hole, coal body is pressed off formation and is run through crack passage, and carries out ickings by water under high pressure, reaches to increase gas permeability of coal seam
Purpose.
In the present embodiment, choose different boring to 12408 Di Chou lane fracturing gas monitors: take slot fracturing work
After, the average gas extraction concentration of 126～137# borings is between 15%～92%, and average gas extraction concentration is
48.04%；The average gas extraction concentration of 158～163# borings is between 12%～61%, and average gas extraction concentration is
32.52%；The average gas extraction concentration of 181～186# borings is between 11%～69%, and average gas extraction concentration is
45.81%；The average gas extraction concentration of 198～203# borings is between 10%～61%, and average gas extraction concentration is
36.15%；The average gas extraction concentration of 227～232# borings is between 10%～75%, and average gas extraction concentration is
40.35%；And contrast the average gas extraction concentration of conventional 116#～125# boring between 5%～35%, average gas
Extraction concentration is 13.18%, as shown in table 1.
After comparing result is it can be seen that take the present embodiment anti-reflection operation of slot pressure break, the mean concentration of its gas pumping
It it is 3.08 times of conventional boring；Obviously, the comprehensive anti-reflection operation of slot pressure break is taked to achieve obvious antireflective effect.
The contrast of the gas density that the boring that table 1 takes slot pressure break the most anti-reflection is holed with routine
Embodiment described above is only to be described preferred implementation of the present utility model, not to this practicality
Novel scope is defined, and on the premise of without departing from this utility model design spirit, those of ordinary skill in the art are to this
Various deformation that the technical scheme of utility model is made and improvement, all should fall into the protection that this utility model claims determine
In the range of.
Claims (3)
1. the boring arrangement of a coal seam high-pressure hydraulic slot pressure break, it is characterised in that: in Di Chou lane (3) along its length
Direction offers three row hole drillings to coal seam (4) direction, and every row hole drilling all includes multiple slot boring (1) and the boring of multiple pressure break
(2), wherein the tapping point of a row hole drilling is positioned at back；The tapping point of other two row hole drillings is respectively positioned on lane side；Every row hole drilling
Adjacent two described pressure breaks boring (2) between be provided with two described slots boring (1) at equal intervals.
The boring arrangement of coal seam the most according to claim 1 high-pressure hydraulic slot pressure break, it is characterised in that: adjacent two
Arrange at equal intervals between individual described slot boring (1) or adjacent described slot boring (1) and described pressure break boring (2).
The boring arrangement of coal seam the most according to claim 1 and 2 high-pressure hydraulic slot pressure break, it is characterised in that: phase
Distance between adjacent boring is 10-12m.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620764216.XU CN205823322U (en) | 2016-07-19 | 2016-07-19 | A kind of boring arrangement of coal seam high-pressure hydraulic slot pressure break |
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| CN201620764216.XU CN205823322U (en) | 2016-07-19 | 2016-07-19 | A kind of boring arrangement of coal seam high-pressure hydraulic slot pressure break |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971663A (en) * | 2016-07-19 | 2016-09-28 | 淮南宏昌科技有限责任公司 | Drill hole arrangement structure and permeability-increasing method for coal seam high-pressure waterpower slotted fracturing |
| CN110242256A (en) * | 2019-06-19 | 2019-09-17 | 河南理工大学 | A kind of efficient mash gas extraction device of drilling subsection |
| CN112253067A (en) * | 2020-08-26 | 2021-01-22 | 煤科集团沈阳研究院有限公司 | Cross fracturing cooperative permeability increasing method for grid drilling of thick coal seam |
-
2016
- 2016-07-19 CN CN201620764216.XU patent/CN205823322U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971663A (en) * | 2016-07-19 | 2016-09-28 | 淮南宏昌科技有限责任公司 | Drill hole arrangement structure and permeability-increasing method for coal seam high-pressure waterpower slotted fracturing |
| CN110242256A (en) * | 2019-06-19 | 2019-09-17 | 河南理工大学 | A kind of efficient mash gas extraction device of drilling subsection |
| CN112253067A (en) * | 2020-08-26 | 2021-01-22 | 煤科集团沈阳研究院有限公司 | Cross fracturing cooperative permeability increasing method for grid drilling of thick coal seam |
| CN112253067B (en) * | 2020-08-26 | 2021-12-10 | 中煤科工集团沈阳研究院有限公司 | Cross fracturing cooperative permeability increasing method for grid drilling of thick coal seam |
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