CN105804692A - Novel coal mine gas pressure measurement grouting hole sealing method - Google Patents
Novel coal mine gas pressure measurement grouting hole sealing method Download PDFInfo
- Publication number
- CN105804692A CN105804692A CN201610188774.0A CN201610188774A CN105804692A CN 105804692 A CN105804692 A CN 105804692A CN 201610188774 A CN201610188774 A CN 201610188774A CN 105804692 A CN105804692 A CN 105804692A
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- Prior art keywords
- slip casting
- capsule
- pressure
- grouting
- hole
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
Abstract
The invention discloses a novel coal mine gas pressure measurement grouting hole sealing method, which comprises the following steps that 1, a grouting capsule is put into a short casing pipe for expanding when the grouting capsule meets water, and after a grouting drill pipe is connected with the grouting capsule, the grouting capsule and the short casing pipe are directly and jointly put to a position in a coal meeting point in the deep position of rock holes; 2, grouting is performed through the grouting drill pipe and the grouting capsule so as to seal and plug peripheral cracks and pore spaces between the rock holes near the coal meeting point and the short casing pipe; and 3, after the hole bottom cleaning, the grouting drill pipe and the grouting capsule are dismounted; a pressure measurement hole sealing device is directly into the short casing pipe; two capsules of the hole sealing device are in tight contact with the inner side of the short casing pipe after expanding to a certain pressure; viscous fluid is injected into a position between the two capsules of the pressure measurement hole sealing device; after the viscous fluid reaches a certain pressure, a sealed pressure measurement gas chamber can be formed; and the water pressure interference is eliminated. The problem that the water pressure interference cannot be fast eliminated for accurate and fast measuring the gas pressure by the existing hole sealing method is solved.
Description
Technical field
The present invention relates to a kind of mine coal seam gas pressure measurement technology, particularly relate to a kind of new-type coal mine gas piezometry slip-casting hole-sealing method.
Background technology
In coal mining, Gas Disaster is always up one of major casualty threatening Safety of Coal Mine Production.Increase along with mining depth, Gas Disaster particularly coal and gas prominent disaster is on the rise, and coal-bed gas pressure whether be prediction coal seam have an important indicator of outburst hazard, for forecasting coal and gas outburst risk and take corresponding prophylactico-therapeutic measures most important so accurately quickly measuring coal-bed gas pressure.
But at the scene in practice, due to the impact of various factors, the original gas pressure in pressure measurement result deviation coal seam can be caused or what directly record is hydraulic pressure, although the gas pressure in coal seam sometimes can be measured, but pressure measurement overlong time, have a strong impact on mining progress.
Summary of the invention
It is an object of the invention to provide a kind of new-type coal mine gas piezometry slip-casting hole-sealing method.
It is an object of the invention to 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, to open a diameter in rock mass be the horizontal drilling of a or up boring, creeps into seeing that coal point stops；
B, foundation are shown in that near coal point, whether rock has the width in water-bearing layer and water-bearing layer, selects the short sleeve of appropriate length, and short sleeve diameter is b, and b < a, and arc-shaped is processed in short sleeve rear end；
C, slip casting capsule is filled in short sleeve, utilize water pump pressurization to make capsule expand, by slip casting capsule and short sleeve one entirety of formation, at short sleeve rear end outer felt last layer polyurethane；
D, slip casting capsule and short sleeve are filled in boring Jian Meidian front, depths, slip casting capsule slip casting drilling rod is connected successively, extends to outside boring, and slip casting drilling rod internal diameter is identical with slip casting capsule internal diameter, is sized to c；
E, utilizing slip casting machine to carry out slip casting by slip casting drilling rod and slip casting capsule, grouting pressure need not be too big first, stops slip casting when just having played pressure, solidifies 48h after slip casting；
F, utilize drilling rod cleaning bottom of hole that bit diameter is d (d < c) to when seeing coal only, then utilize slip casting drilling rod and slip casting capsule secondary grouting, secondary grouting pressure is relatively big, is greater than the hydraulic pressure in this place's rock, solidifies 48h after slip casting；
G, utilizing bit diameter for the drilling rod secondary cleaning bottom of hole of d (d < c), cleaning bottom of hole is to 1-2m in coal.Then the hydraulic pressure of removal slip casting capsule, makes capsule shrink, and exits slip casting drilling rod and slip casting capsule；
H, filling in short sleeve by pressure measurement hole packer, water filling makes pressure measurement capsule expand, and the bulbs of pressure are 3MPa, is then filled with mucus between hole packer two pressure measurement capsule, and mucus pressure is 2MPa；
I, above-mentioned steps end of operation, connect pressure-measuring pipe the gas pressure table with threeway, start to observe gas pressure, and make a record.
As seen from the above technical solution provided by the invention, the new-type coal mine gas piezometry slip-casting hole-sealing method that the embodiment of the present invention provides, it is possible to measure the gas pressure in coal seam rapidly and accurately, and get rid of the interference of rock stratum hydraulic pressure.
Accompanying drawing explanation
Fig. 1 is the slip casting structural representation 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 structural representation in the embodiment of the present invention；
Fig. 4 is the slip casting structure A-A generalized section in the embodiment of the present invention；
Fig. 5 is the slip casting structure B-B generalized section in the embodiment of the present invention；
Fig. 6 is the slip casting structure C-C generalized section in the embodiment of the present invention；
In figure:
1 coal seam 2 rock mass 3 serosity 4 sleeve pipe 5 polyurethane 6 slip casting capsule 7 slip casting 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 mucus pipeline 14 methane gas pipeline 15 4 is in charge of 16 mucus pump 17 gas pressure tables.
Detailed description of the invention
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 preferably detailed description of the invention be:
Including step:
A, to open a diameter in rock mass be the horizontal drilling of a or up boring, creeps into seeing that coal point stops；
B, foundation are shown in that near coal point, whether rock has the width in water-bearing layer and water-bearing layer, selects the short sleeve of appropriate length, and short sleeve diameter is b, and b < a, and arc-shaped is processed in short sleeve rear end；
C, slip casting capsule is filled in short sleeve, utilize water pump pressurization to make capsule expand, by slip casting capsule and short sleeve one entirety of formation, at short sleeve rear end outer felt last layer polyurethane；
D, slip casting capsule and short sleeve are filled in boring Jian Meidian front, depths, slip casting capsule slip casting drilling rod is connected successively, extends to outside boring, and slip casting drilling rod internal diameter is identical with slip casting capsule internal diameter, is sized to c；
E, utilizing slip casting machine to carry out slip casting by slip casting drilling rod and slip casting capsule, grouting pressure need not be too big first, stops slip casting when just having played pressure, solidifies 48h after slip casting；
F, utilize drilling rod cleaning bottom of hole that bit diameter is d (d < c) to when seeing coal only, then utilize slip casting drilling rod and slip casting capsule secondary grouting, secondary grouting pressure is relatively big, is greater than the hydraulic pressure in this place's rock, solidifies 48h after slip casting；
G, utilizing bit diameter for the drilling rod secondary cleaning bottom of hole of d (d < c), cleaning bottom of hole is to 1-2m in coal.Then the hydraulic pressure of removal slip casting capsule, makes capsule shrink, and exits slip casting drilling rod and slip casting capsule；
H, filling in short sleeve by pressure measurement hole packer, water filling makes pressure measurement capsule expand, and the bulbs of pressure are 3MPa, is then filled with mucus between hole packer two pressure measurement capsule, and mucus pressure is 2MPa；
I, above-mentioned steps end of operation, connect pressure-measuring pipe the gas pressure table with threeway, start to observe gas pressure, and make a record.
The end of described slip casting drilling rod final section must be burn-on ring flange, in order to the slip casting that has been connected with the grouting pipeline of slip casting machine works.
Arc-shaped is processed into when being for sealing of hole in the rear end of described short sleeve, allows pressure measurement hole packer enter sleeve pipe smoothly.
The rear end outer felt last layer polyurethane of described short sleeve, is, it is prevented that it is back in short sleeve, brings inconvenience to follow-up work make serosity enter in the crack between short sleeve and petrosal foramen simultaneously, block crack to when first slip casting, block serosity.
If described secondary grouting grouting pressure does not reach setting value, then need to increase slip casting number of times, until it reaches till setting value, the corresponding cleaning bottom of hole degree of depth also to strengthen accordingly.
The new-type coal mine gas piezometry slip-casting hole-sealing method of the present invention, it is possible to measure the gas pressure in coal seam rapidly and accurately, and get rid of the interference of rock stratum hydraulic pressure.
Specific embodiment, as shown in Figures 1 to 6, including step:
(1) opening a diameter in rock mass is the horizontal drilling of 193mm or up boring, creeps into seeing that coal point stops；
(2) according to seeing that near coal point, whether rock has the width in water-bearing layer and water-bearing layer, selects the short sleeve of appropriate length, short sleeve diameter is 146mm, and arc-shaped is processed in short sleeve rear end；
(3) slip casting capsule is filled in short sleeve, utilize water pump pressurization to make capsule expand, slip casting capsule is formed an entirety with short sleeve, at short sleeve rear end outer felt last layer polyurethane；
(4) slip casting capsule and short sleeve are filled in boring Jian Meidian front, depths, and slip casting capsule slip casting drilling rod is connected successively, extends to outside boring, and slip casting drilling rod internal diameter is identical with slip casting capsule internal diameter, is sized to 95mm；
(5) utilizing slip casting machine to carry out slip casting by slip casting drilling rod and slip casting capsule, grouting pressure need not be too big first, stops slip casting when just having played pressure, solidifies 48h after slip casting；
(6) utilizing the drilling rod cleaning bottom of hole that bit diameter is 75mm to stop to when seeing coal, then utilize slip casting drilling rod and slip casting capsule secondary grouting, secondary grouting pressure is relatively big, is greater than the hydraulic pressure in this place's rock, solidifies 48h after slip casting；
(7) utilizing the drilling rod secondary cleaning bottom of hole that bit diameter is 75mm, cleaning bottom of hole is to 1-2m in coal.Then the hydraulic pressure of removal slip casting capsule, makes capsule shrink, and exits slip casting drilling rod and slip casting capsule；
(8) filling in short sleeve by pressure measurement hole packer, water filling makes pressure measurement capsule expand, and the bulbs of pressure are 3MPa, is then filled with mucus between hole packer two pressure measurement capsule, and mucus pressure is 2MPa；
(9) above-mentioned steps end of operation, connects pressure-measuring pipe the gas pressure table with threeway, starts to observe gas pressure, and make a record；
(10) step (6) if in secondary grouting grouting pressure do not reach setting value, then need increase slip casting number of times, until it reaches till setting value, the corresponding cleaning bottom of hole degree of depth also to strengthen accordingly.Concrete numerical value in each step is referential data, it is possible to adjust accordingly according to practical situation.
Innovation and the advantage of this device are in that:
(1) creatively propose to be placed into short sleeve and see coal point front, utilize slip casting drilling rod and slip casting capsule to carry out slip casting closure crack, eliminate the influence of hydraulic pressure seeing coal point front water-bearing stratum；
(2) pressure measurement hole packer is directly put into short sleeve sealing of hole by creationary proposition, is in close contact with sleeve pipe, adds the pressure-bearing mucus between two capsules, it is possible to form the good pressure measurement air chamber of seal after capsule dilation by water injection；
(3) this slip casting and method for sealing had both overcome in conjunction with level or uphole perforate mode and be difficult to close contact between capsule and petrosal foramen in traditional method and mucus is difficult to the gas leakage problem that upper pressure causes, also overcomed the high cost problem of two-stage sleeve pipe water blockoff.
The above; being only the present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope of present disclosure; the change that can readily occur in or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (5)
1. a new-type coal mine gas piezometry slip-casting hole-sealing method, it is characterised in that include step:
A, to open a diameter in rock mass be the horizontal drilling of a or up boring, creeps into seeing that coal point stops；
B, foundation are shown in that near coal point, whether rock has the width in water-bearing layer and water-bearing layer, selects the short sleeve of appropriate length, and short sleeve diameter is b, and b < a, and arc-shaped is processed in short sleeve rear end；
C, slip casting capsule is filled in short sleeve, utilize water pump pressurization to make capsule expand, by slip casting capsule and short sleeve one entirety of formation, at short sleeve rear end outer felt last layer polyurethane；
D, slip casting capsule and short sleeve are filled in boring Jian Meidian front, depths, slip casting capsule slip casting drilling rod is connected successively, extends to outside boring, and slip casting drilling rod internal diameter is identical with slip casting capsule internal diameter, is sized to c；
E, utilizing slip casting machine to carry out slip casting by slip casting drilling rod and slip casting capsule, grouting pressure need not be too big first, stops slip casting when just having played pressure, solidifies 48h after slip casting；
F, utilize drilling rod cleaning bottom of hole that bit diameter is d (d < c) to when seeing coal only, then utilize slip casting drilling rod and slip casting capsule secondary grouting, secondary grouting pressure is relatively big, is greater than the hydraulic pressure in this place's rock, solidifies 48h after slip casting；
G, utilizing bit diameter for the drilling rod secondary cleaning bottom of hole of d (d < c), cleaning bottom of hole is to 1-2m in coal.Then the hydraulic pressure of removal slip casting capsule, makes capsule shrink, and exits slip casting drilling rod and slip casting capsule；
H, filling in short sleeve by pressure measurement hole packer, water filling makes pressure measurement capsule expand, and the bulbs of pressure are 3MPa, is then filled with mucus between hole packer two pressure measurement capsule, and mucus pressure is 2MPa；
I, above-mentioned steps end of operation, connect pressure-measuring pipe the gas pressure table with threeway, start to observe gas pressure, and make a record.
2. new-type coal mine gas piezometry slip-casting hole-sealing method according to claim 1, it is characterised in that the end of described slip casting drilling rod final section must be burn-on ring flange, in order to the slip casting that has been connected with the grouting pipeline of slip casting machine works.
3. new-type coal mine gas piezometry slip-casting hole-sealing method according to claim 1, it is characterised in that arc-shaped is processed into when being for sealing of hole in the rear end of described short sleeve, allows pressure measurement hole packer enter sleeve pipe smoothly.
4. new-type coal mine gas piezometry slip-casting hole-sealing method according to claim 2, it is characterized in that, the rear end outer felt last layer polyurethane of described short sleeve, it is in order to when first slip casting, block serosity, it is prevented that it is back in short sleeve, brings inconvenience to follow-up work, make serosity enter in the crack between short sleeve and petrosal foramen simultaneously, block crack.
5. the new-type coal mine gas piezometry slip-casting hole-sealing method according to any one of Claims 1-4, it is characterized in that, if described secondary grouting grouting pressure does not reach setting value, then need to increase slip casting number of times, till reaching setting value, the corresponding cleaning bottom of hole degree of depth also to strengthen 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 |
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| 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 |
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| Publication Number | Publication Date |
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| CN105804692A true CN105804692A (en) | 2016-07-27 |
| CN105804692B CN105804692B (en) | 2018-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
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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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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106639962A (en) * | 2016-10-17 | 2017-05-10 | 华北理工大学 | Secondary hole sealing and pressure measuring device based on expanding agents |
| CN106869855A (en) * | 2017-04-25 | 2017-06-20 | 中煤科工集团重庆研究院有限公司 | One kind automatically prevents gas exceeding limit 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 |
| CN109341934A (en) * | 2018-10-29 | 2019-02-15 | 山东科技大学 | A kind of floor water-bearing rock hydraulic pressure dynamic monitoring equipment and monitoring method |
| CN111561291A (en) * | 2020-05-06 | 2020-08-21 | 太原理工大学 | Double-layer extrusion type hole sealing device and method for gas extraction drill hole |
| CN117345226A (en) * | 2023-10-26 | 2024-01-05 | 中国矿业大学 | Coal seam double-sleeve stepped grouting, layer-penetrating and pressure measuring drilling construction method |
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| CN103452525A (en) * | 2013-09-06 | 2013-12-18 | 河南理工大学 | Gas pumping fixing occluder and use method thereof |
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| CN104500042A (en) * | 2014-10-16 | 2015-04-08 | 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
- 2016-03-29 CN CN201610188774.0A patent/CN105804692B/en not_active Expired - Fee Related
Patent Citations (7)
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| CN102071961A (en) * | 2010-12-24 | 2011-05-25 | 陕西陕煤韩城矿业有限公司 | Downward gas drainage drill hole and pressure testing drill hole sealing method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106639962A (en) * | 2016-10-17 | 2017-05-10 | 华北理工大学 | Secondary hole sealing and pressure measuring device based on expanding agents |
| 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 | One kind automatically prevents gas exceeding limit 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 |
| CN109341934A (en) * | 2018-10-29 | 2019-02-15 | 山东科技大学 | A kind of floor water-bearing rock hydraulic pressure dynamic monitoring equipment and monitoring method |
| 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 |
| CN111561291A (en) * | 2020-05-06 | 2020-08-21 | 太原理工大学 | Double-layer extrusion type hole sealing device and method for gas extraction drill hole |
| CN117345226A (en) * | 2023-10-26 | 2024-01-05 | 中国矿业大学 | Coal seam double-sleeve stepped grouting, layer-penetrating and pressure measuring drilling construction method |
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Granted publication date: 20180508 Termination date: 20190329 |