CN105804692B - A kind of new-type coal mine gas piezometry slip-casting hole-sealing method - Google Patents
A kind of new-type coal mine gas piezometry slip-casting hole-sealing method Download PDFInfo
- Publication number
- CN105804692B CN105804692B CN201610188774.0A CN201610188774A CN105804692B CN 105804692 B CN105804692 B CN 105804692B CN 201610188774 A CN201610188774 A CN 201610188774A CN 105804692 B CN105804692 B CN 105804692B
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- Prior art keywords
- slip casting
- capsule
- pressure
- hole
- slip
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- Expired - Fee Related
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- 238000007569 slipcasting Methods 0.000 title claims abstract description 121
- 239000003245 coal Substances 0.000 title claims abstract description 49
- 238000007789 sealing Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000002775 capsule Substances 0.000 claims abstract description 67
- 238000005553 drilling Methods 0.000 claims abstract description 59
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims abstract description 16
- 210000003097 mucus Anatomy 0.000 claims abstract description 12
- 239000011435 rock Substances 0.000 claims description 16
- 239000002002 slurry Substances 0.000 claims description 7
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000010339 dilation Effects 0.000 abstract description 2
- 238000002347 injection Methods 0.000 abstract description 2
- 239000007924 injection Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of new-type coal mine gas piezometry slip-casting hole-sealing method, including step：1) slip casting capsule is put into dilation by water injection in short sleeve, slip casting capsule is directly placed into petrosal foramen depths by slip casting drilling rod after the connection of slip casting capsule together with short sleeve to be seen in front of coal point；2) slip casting is carried out by slip casting drilling rod and slip casting capsule to block short sleeve and the hole seen between the petrosal foramen near coal point and surrounding crack；3) after cleaning bottom of hole, remove slip casting drilling rod and slip casting capsule, pressure measurement hole packer is directly placed into short sleeve, hole packer two capsules are expanded into after certain pressure with being in close contact on the inside of short sleeve, mucus is injected between pressure measurement hole packer two capsules, after mucus reaches certain pressure, a closed pressure measurement gas chamber just can be formed, excludes hydraulic pressure interference.Solve the problems, such as that existing method for sealing is difficult to exclude hydraulic pressure interference, quickly and accurately measures gas pressure.
Description
Technical field
The present invention relates to a kind of mine coal seam gas pressure measurement technology, more particularly to a kind of new-type coal mine gas pressure to survey
Determine slip-casting hole-sealing method.
Background technology
In coal mining, Gas Disaster is always one of major casualty for threatening Safety of Coal Mine Production.With mining depth
The increase of degree, Gas Disaster particularly coal and gas prominent disaster are on the rise, and coal-bed gas pressure is whether to predict coal seam
An important indicator with outburst hazard, so accurate quick measure coal-bed gas pressure is for predicting coal and gas prominent
It is dangerous and take corresponding control measure most important.
But in putting into practice at the scene, due to the influence of various factors, pressure measurement result can be caused to deviate the original gas pressure in coal seam
Power or what is directly measured is hydraulic pressure, although can measure the gas pressure in coal seam sometimes, pressure measurement overlong time, seriously affects digging
Progress.
The content of the invention
The object of the present invention is to provide a kind of new-type coal mine gas piezometry slip-casting hole-sealing method.
The purpose of the present invention is what is be achieved through the following technical solutions：
The new-type coal mine gas piezometry slip-casting hole-sealing method of the present invention, including step：
A, horizontal drilling or the uplink drilling of a diameter of a is opened in rock mass, drilling drilling is to being shown in that coal point stops；
B, according to seeing whether the neighbouring rock of coal point has the width in water-bearing layer and water-bearing layer, the short sleeve of appropriate length is selected,
The a diameter of b of short sleeve, and b<Arc-shaped is processed into a, short sleeve rear end；
C, slip casting capsule is filled in into short sleeve, expands capsule using water pump pressurization, slip casting capsule is formed with short sleeve
One entirety, is wrapped with a strata urethane on the outside of short sleeve rear end；
D, slip casting capsule and short sleeve are filled in drilling depths to see in front of coal point, slip casting capsule slip casting drilling rod phase successively
Even, it is outer to extend to drilling, and slip casting drilling rod internal diameter is identical with slip casting capsule internal diameter, size c；
E, slip casting is carried out by slip casting drilling rod and slip casting capsule using slip casting machine, grouting pressure does not have to too big first, just rises
Stop slip casting during pressure, solidify 48h after slip casting；
F, it is d (d using bit diameter<C) then drilling rod cleaning bottom of hole utilizes slip casting drilling rod and slip casting capsule to stopping when seeing coal
Secondary grouting, secondary grouting pressure is larger, and the hydraulic pressure being greater than at this in rock, solidifies 48h after slip casting；
G, it is d (d using bit diameter<C) the secondary cleaning bottom of hole of drilling rod, 1-2m in cleaning bottom of hole to coal.Then removal slip casting capsule
Hydraulic pressure, shrink capsule, exit slip casting drilling rod and slip casting capsule；
H, pressure measurement hole packer is filled in short sleeve, water filling expands pressure measurement capsule, and bulbs of pressure 3MPa, is then being sealed
Mucus is filled between two pressure measurement capsule of hole device, mucus pressure is 2MPa；
I, above-mentioned steps end of operation, the gas pressure table with threeway is connected by pressure-measuring pipe, starts to observe gas pressure,
And make a record.
As seen from the above technical solution provided by the invention, new-type coal mine gas pressure provided in an embodiment of the present invention
Slip-casting hole-sealing method is measured, can rapidly and accurately measure the gas pressure in coal seam, and exclude the interference of rock stratum hydraulic pressure.
Brief description of the drawings
Fig. 1 is the slip casting structure diagram in the embodiment of the present invention；
Fig. 2 is the hole sealing structure schematic diagram in the embodiment of the present invention；
Fig. 3 is the short sleeve structure diagram in the embodiment of the present invention；
Fig. 4 is the slip casting structure A-A diagrammatic cross-sections in the embodiment of the present invention；
Fig. 5 is the slip casting structure B-B diagrammatic cross-sections in the embodiment of the present invention；
Fig. 6 is the slip casting structure C-C diagrammatic cross-sections in the embodiment of the present invention；
In figure：
1-coal seam, 2-rock mass, 3-slurries, 4-casing, 5-polyurethane, 6-slip casting, 7-slip casting of capsule drilling rod 8-
Slip casting capsule water injecting pipeline 9-water pump, 10-slip casting machine, 11-pressure measurement capsule 12-pressure measurement capsule water injecting pipeline 13-glutinous
14-methane gas of liquid pipeline pipeline 15-four is in charge of 16-mucus pump 17-gas pressure table.
Embodiment
The embodiment of the present invention will be described in further detail below.
The new-type coal mine gas piezometry slip-casting hole-sealing method of the present invention, its preferable embodiment are：
Including step：
A, horizontal drilling or the uplink drilling of a diameter of a is opened in rock mass, drilling drilling is to being shown in that coal point stops；
B, according to seeing whether the neighbouring rock of coal point has the width in water-bearing layer and water-bearing layer, the short sleeve of appropriate length is selected,
The a diameter of b of short sleeve, and b<Arc-shaped is processed into a, short sleeve rear end；
C, slip casting capsule is filled in into short sleeve, expands capsule using water pump pressurization, slip casting capsule is formed with short sleeve
One entirety, is wrapped with a strata urethane on the outside of short sleeve rear end；
D, slip casting capsule and short sleeve are filled in drilling depths to see in front of coal point, slip casting capsule slip casting drilling rod phase successively
Even, it is outer to extend to drilling, and slip casting drilling rod internal diameter is identical with slip casting capsule internal diameter, size c；
E, slip casting is carried out by slip casting drilling rod and slip casting capsule using slip casting machine, grouting pressure does not have to too big first, just rises
Stop slip casting during pressure, solidify 48h after slip casting；
F, it is d (d using bit diameter<C) then drilling rod cleaning bottom of hole utilizes slip casting drilling rod and slip casting capsule to stopping when seeing coal
Secondary grouting, secondary grouting pressure is larger, and the hydraulic pressure being greater than at this in rock, solidifies 48h after slip casting；
G, it is d (d using bit diameter<C) the secondary cleaning bottom of hole of drilling rod, 1-2m in cleaning bottom of hole to coal.Then removal slip casting capsule
Hydraulic pressure, shrink capsule, exit slip casting drilling rod and slip casting capsule；
H, pressure measurement hole packer is filled in short sleeve, water filling expands pressure measurement capsule, and bulbs of pressure 3MPa, is then being sealed
Mucus is filled between two pressure measurement capsule of hole device, mucus pressure is 2MPa；
I, above-mentioned steps end of operation, the gas pressure table with threeway is connected by pressure-measuring pipe, starts to observe gas pressure,
And make a record.
The end of the slip casting drilling rod final section must burn-on ring flange, so that the grouting pipeline with slip casting machine is connected
Complete slip casting work.
Arc-shaped is processed into the rear end of the short sleeve when being for sealing of hole, allows the smooth sleeve pipe of pressure measurement hole packer.
A strata urethane is wrapped with the outside of the rear end of the short sleeve, is in first slip casting, block slurries, prevent
It is back in short sleeve, is brought inconvenience to follow-up work, while slurries is entered in the crack between short sleeve and petrosal foramen, envelope
Stifled crack.
If the secondary grouting grouting pressure does not reach setting value, need to increase slip casting number, set until reaching
Untill definite value, corresponding cleaning bottom of hole depth also will be increased accordingly.
The new-type coal mine gas piezometry slip-casting hole-sealing method of the present invention, can rapidly and accurately measure the gas in coal seam
Pressure, and exclude the interference of rock stratum hydraulic pressure.
Specific embodiment, as shown in Figures 1 to 6, including step：
(1) horizontal drilling or the uplink drilling of a diameter of 193mm is opened in rock mass, drilling drilling is to being shown in that coal point stops；
(2) according to seeing whether the neighbouring rock of coal point has the width in water-bearing layer and water-bearing layer, the short sleeve of appropriate length is selected,
Arc-shaped is processed into a diameter of 146mm of short sleeve, short sleeve rear end；
(3) slip casting capsule is filled in into short sleeve, expands capsule using water pump pressurization, slip casting capsule is formed with short sleeve
One entirety, is wrapped with a strata urethane on the outside of short sleeve rear end；
(4) slip casting capsule and short sleeve are filled in drilling depths to see in front of coal point, slip casting capsule slip casting drilling rod phase successively
Even, it is outer to extend to drilling, and slip casting drilling rod internal diameter is identical with slip casting capsule internal diameter, size 95mm；
(5) slip casting is carried out by slip casting drilling rod and slip casting capsule using slip casting machine, grouting pressure does not have to too big first, just rises
Stop slip casting during pressure, solidify 48h after slip casting；
(6) slip casting drilling rod and slip casting capsule are then utilized to stopping when seeing coal using the drilling rod cleaning bottom of hole that bit diameter is 75mm
Secondary grouting, secondary grouting pressure is larger, and the hydraulic pressure being greater than at this in rock, solidifies 48h after slip casting；
(7) using the secondary cleaning bottom of hole of drilling rod that bit diameter is 75mm, 1-2m in cleaning bottom of hole to coal.Then removal slip casting capsule
Hydraulic pressure, shrinks capsule, exits slip casting drilling rod and slip casting capsule；
(8) pressure measurement hole packer is filled in short sleeve, water filling expands pressure measurement capsule, the bulbs of pressure 3MPa, Ran Hou
Mucus is filled between two pressure measurement capsule of hole packer, mucus pressure is 2MPa；
(9) above-mentioned steps end of operation, the gas pressure table with threeway is connected by pressure-measuring pipe, starts to observe gas pressure
Power, and make a record；
(10) step (6) if in secondary grouting grouting pressure do not reach setting value, need increase slip casting number, until
Untill reaching setting value, corresponding cleaning bottom of hole depth also will be increased accordingly.Concrete numerical value in each step is referential data, Ke Yigen
Adjusted accordingly according to actual conditions.
The innovation and advantage of the present apparatus are：
(1) creatively propose short sleeve being placed into and see in front of coal point, noted using slip casting drilling rod and slip casting capsule
Slurry closure crack, eliminates the influence of hydraulic pressure for seeing water-bearing stratum in front of coal point；
(2) pressure measurement hole packer is directly put into sealing of hole in short sleeve by creative proposition, after capsule dilation by water injection with casing
It is in close contact, plus the pressure-bearing mucus between two capsules, the preferable pressure measurement gas chamber of seal can be formed；
(3) slip casting and method for sealing combine horizontal or uphole perforate mode and had both overcome capsule and rock in conventional method
Be difficult between hole be in close contact and mucus be difficult to pressure caused by gas leakage problem, also overcome two-stage casing water blockoff it is high into
This problem.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can readily occur in,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (5)
1. a kind of new-type coal mine gas piezometry slip-casting hole-sealing method, it is characterised in that including step：
A, horizontal drilling or the uplink drilling of a diameter of a is opened in rock mass, drilling drilling is to being shown in that coal point stops；
B, according to seeing whether the neighbouring rock of coal point has the width in water-bearing layer and water-bearing layer, the short sleeve of appropriate length, short set are selected
Pipe diameter is b, and b<Arc-shaped is processed into a, short sleeve rear end；
C, slip casting capsule is filled in into short sleeve, expands capsule using water pump pressurization, slip casting capsule and short sleeve are formed one
It is overall, a strata urethane is wrapped with the outside of short sleeve rear end；
D, slip casting capsule and short sleeve are filled in into drilling depths and sees in front of coal point that slip casting capsule slip casting drilling rod is connected, prolongs successively
It is outer to extend drilling, and slip casting drilling rod internal diameter is identical with slip casting capsule internal diameter, size c；
E, slip casting is carried out by slip casting drilling rod and slip casting capsule using slip casting machine, grouting pressure does not have to too big first, when just having played pressure
Stop slip casting, solidify 48h after slip casting；
F, it is d using bit diameter, and d<Then the drilling rod cleaning bottom of hole of c utilizes slip casting drilling rod and slip casting capsule two to stopping when seeing coal
Secondary slip casting, secondary grouting pressure is larger, and the hydraulic pressure being greater than at this in rock, solidifies 48h after slip casting；
G, it is d using bit diameter, and d<The secondary cleaning bottom of hole of drilling rod of c, the water of 1-2m, then removal slip casting capsule in cleaning bottom of hole to coal
Pressure, shrinks capsule, exits slip casting drilling rod and slip casting capsule；
H, pressure measurement hole packer is filled in short sleeve, water filling expands pressure measurement capsule, bulbs of pressure 3MPa, then in hole packer
Mucus is filled between two pressure measurement capsules, mucus pressure is 2MPa；
I, above-mentioned steps end of operation, the gas pressure table with threeway is connected by pressure-measuring pipe, starts to observe gas pressure, and do
Record easy to remember.
2. new-type coal mine gas piezometry slip-casting hole-sealing method according to claim 1, it is characterised in that the note
The end of slurry drilling rod final section must burn-on ring flange, and slip casting work is completed so that the grouting pipeline with slip casting machine is connected.
3. new-type coal mine gas piezometry slip-casting hole-sealing method according to claim 1, it is characterised in that described is short
Arc-shaped is processed into the rear end of casing when being for sealing of hole, allows the smooth sleeve pipe of pressure measurement hole packer.
4. new-type coal mine gas piezometry slip-casting hole-sealing method according to claim 2, it is characterised in that described is short
A strata urethane is wrapped with the outside of the rear end of casing, is in first slip casting, block slurries, prevent it to be back to short sleeve
It is interior, bring inconvenience to follow-up work, while slurries is entered in the crack between short sleeve and petrosal foramen, block crack.
5. new-type coal mine gas piezometry slip-casting hole-sealing method according to any one of claims 1 to 4, its feature exist
In if the secondary grouting grouting pressure does not reach setting value, needing to increase slip casting number, until reaching setting value and being
Only, corresponding cleaning bottom of hole depth also will be increased accordingly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610188774.0A CN105804692B (en) | 2016-03-29 | 2016-03-29 | A kind of new-type coal mine gas piezometry slip-casting hole-sealing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610188774.0A CN105804692B (en) | 2016-03-29 | 2016-03-29 | A kind of new-type coal mine gas piezometry slip-casting hole-sealing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105804692A CN105804692A (en) | 2016-07-27 |
| CN105804692B true CN105804692B (en) | 2018-05-08 |
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| CN201610188774.0A Expired - Fee Related CN105804692B (en) | 2016-03-29 | 2016-03-29 | A kind of new-type coal mine gas piezometry slip-casting hole-sealing method |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106639962B (en) * | 2016-10-17 | 2022-10-11 | 华北理工大学 | Secondary hole sealing pressure measuring device based on expanding agent |
| CN106869855A (en) * | 2017-04-25 | 2017-06-20 | 中煤科工集团重庆研究院有限公司 | Full-automatic gas overrun prevention device |
| CN109162635A (en) * | 2018-09-19 | 2019-01-08 | 淮北矿业股份有限公司 | A kind of new pressure measuring drill hole construction technology |
| CN109341934B (en) * | 2018-10-29 | 2024-03-22 | 山东科技大学 | Dynamic monitoring equipment and monitoring method for water pressure of bottom plate aquifer |
| CN111561291B (en) * | 2020-05-06 | 2022-04-08 | 太原理工大学 | Double-layer extrusion type hole sealing device and method for gas extraction drill hole |
| CN117345226B (en) * | 2023-10-26 | 2024-09-20 | 中国矿业大学 | Coal seam double-sleeve stepped grouting, layer-penetrating and pressure measuring drilling construction method |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1131463A (en) * | 1980-08-01 | 1982-09-14 | Susan A. De Korompay | Method of fracturation detection |
| CN102071961B (en) * | 2010-12-24 | 2012-09-05 | 陕西陕煤韩城矿业有限公司 | Downward gas drainage drill hole and pressure testing drill hole sealing method |
| CN103015984A (en) * | 2012-12-19 | 2013-04-03 | 河南焦煤能源有限公司科学技术研究所 | Method for measuring gas pressure of coal seam by casing high-pressure hole sealing method |
| CN103015986B (en) * | 2013-01-16 | 2015-09-16 | 河南理工大学 | The method of the coal mine underground coal bed gas pressure of a kind of direct mensuration |
| CN103452525B (en) * | 2013-09-06 | 2016-08-10 | 河南理工大学 | Gas takes out fixed stopper and using method thereof |
| CN204200215U (en) * | 2014-09-26 | 2015-03-11 | 宝钢集团新疆八一钢铁有限公司 | Coal seam rapid hole sealing pressure measurement structure |
| CN104500042B (en) * | 2014-10-16 | 2017-05-03 | 山东科技大学 | Measuring method for water-containing coal and rock down drill hole gas pressure observation system |
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- 2016-03-29 CN CN201610188774.0A patent/CN105804692B/en not_active Expired - Fee Related
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| CN105804692A (en) | 2016-07-27 |
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Granted publication date: 20180508 Termination date: 20190329 |