CN109162703A - A kind of soft suitable coal bed drilling multistage on-line pressure sealant pressure measuring unit of overlength and method - Google Patents
A kind of soft suitable coal bed drilling multistage on-line pressure sealant pressure measuring unit of overlength and method Download PDFInfo
- Publication number
- CN109162703A CN109162703A CN201811200994.6A CN201811200994A CN109162703A CN 109162703 A CN109162703 A CN 109162703A CN 201811200994 A CN201811200994 A CN 201811200994A CN 109162703 A CN109162703 A CN 109162703A
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- Prior art keywords
- galvanized pipe
- pressure
- measuring unit
- pressure measuring
- level
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- 238000005553 drilling Methods 0.000 title claims abstract description 42
- 239000003245 coal Substances 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000565 sealant Substances 0.000 title claims abstract description 10
- 239000002360 explosive Substances 0.000 claims abstract description 59
- 239000002775 capsule Substances 0.000 claims abstract description 48
- 238000007569 slipcasting Methods 0.000 claims abstract description 20
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 3
- 239000011440 grout Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 238000007747 plating Methods 0.000 claims description 2
- 239000011701 zinc Substances 0.000 claims description 2
- 229910052725 zinc Inorganic materials 0.000 claims description 2
- 230000035515 penetration Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 235000019994 cava Nutrition 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 210000003097 mucus Anatomy 0.000 description 1
- 239000011435 rock 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- 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
- E21B33/12—Packers; Plugs
- E21B33/127—Packers; Plugs with inflatable sleeve
-
- 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
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geophysics (AREA)
- Measuring Fluid Pressure (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a kind of soft suitable coal bed drilling multistage on-line pressure sealant pressure measuring unit of overlength and methods.It includes pressure measuring unit ontology；Pressure measuring unit includes galvanized pipe, gas pipeline, grouting pump and pressure gauge；Air inlet head is arranged in the top of galvanized pipe；Multiple expanded capsules are arranged in interval on the tube body of galvanized pipe, and opening is equipped on the tube body of the galvanized pipe in the front end first segment expanded capsule of galvanized pipe；Explosive valve is respectively provided on the tube body of galvanized pipe on the tube body of the galvanized pipe in remaining expanded capsule between expanded capsule；Grouting pump is connected on the rear end nozzle of galvanized pipe；Gas pipeline is arranged in the inside of galvanized pipe, connects pressure gauge in one end of the gas pipeline of the rear end nozzle of galvanized pipe.Public affairs of the present invention do not need to be sent into pressure measuring unit after exiting drilling rod, avoid pressure measuring unit and send problem not in place；Solves too long, the problem that slip casting is not in place, grouting pressure penetration radius is too small that drills by multistage slip casting sealing simultaneously.
Description
Technical field
The present invention relates to a kind of soft suitable coal bed drilling multistage on-line pressure sealant pressure measuring unit of overlength and methods, belong to coal mine peace
Full field.
Background technique
Coal-bed gas pressure is one of most basic coal seam parameter, and how rapid and accurate determination coal-bed gas pressure is urgent
The technical problem for needing to solve.Common drilling in coal and rock carries out sealing of hole, base by " a two stifled notes " grouting with pressure or note mucus mode
It can achieve preferable sealing effect on this, measure coal seam Real Gas pressure；And for weak seam ultra-long drilled holes, if bored
Bar send pressure measuring unit again after releasing, then often because of drill hole caves, bending, too deep etc. reasons, cause pressure measuring unit send less than
Position, so that determination of coal seam gas pressure cannot be carried out.
Summary of the invention
The object of the present invention is to provide a kind of soft suitable coal bed drilling multistage on-line pressure sealant pressure measuring unit of overlength and methods.
A kind of soft suitable coal bed drilling multistage on-line pressure sealant pressure measuring unit of overlength provided by the invention, it includes pressure measuring unit
Ontology；
The pressure measuring unit includes galvanized pipe, gas pipeline, grouting pump and pressure gauge；The top of the galvanized pipe be arranged into
Gas head；Multiple expanded capsules are arranged in interval on the tube body of the galvanized pipe, expand described in the front end first segment of the galvanized pipe
The tube body of the galvanized pipe in capsule is equipped with opening；On the tube body of the galvanized pipe in remaining described expanded capsule
It is respectively provided with explosive valve on the tube body of the galvanized pipe between the expanded capsule, the setting in remaining described expanded capsule
The explosive valve is divided into level-one explosive valve, three-level explosive valve to 2n+1 grades of explosions by front end to the rear end of the galvanized pipe
Valve, the explosive valve being arranged on the tube body of the galvanized pipe between the expanded capsule is by the front end of the galvanized pipe to rear
End is divided into second level explosive valve, level Four explosive valve to 2n+2 grades of explosive valves；
The grouting pump is connected on the rear end nozzle of the galvanized pipe；
The gas pipeline is arranged in the inside of the galvanized pipe, in the gas pipeline of the rear end nozzle of the galvanized pipe
One end connect the pressure gauge.
When in use, the pressure measuring unit is set in the drilling rod center that overlength drilling machine bores above-mentioned device；
The top section of the drilling rod is equipped with the detachable PDC drill bit of inner core.
In above-mentioned device, n be 0~4 integer；
Multiple card thorns are arranged in the front end of the galvanized pipe；
Spring is arranged in the side relative to the air inlet head of the card thorn, keeps the card thorn scalable.
In above-mentioned device, multiple air inlets are set at the front end of the nearly air inlet head of the galvanized pipe；
Further, multiple air through hole are arranged in the nearly air inlet position in the top of the galvanized pipe.
In above-mentioned device, on the rear end nozzle of the galvanized pipe connect a three-way interface, the three-way interface it is another
A connection grouting pump in outer two interfaces stretches out the gas pipeline in another interface deeply.
In above-mentioned device, is stretched out in the three-way interface on the interface of the gas pipeline and multiple air through hole are set.
In above-mentioned device, accumulator is equipped between the grouting pump and the nozzle of the galvanized pipe, the accumulator is set
There is shut-off valve.
In above-mentioned device, setting 3 expanded capsules in interval on the tube body of the galvanized pipe, in the front end of the galvanized pipe
The tube body of the galvanized pipe in first expanded capsule is equipped with opening；The institute of setting in remaining described expanded capsule
State explosive valve and level-one explosive valve, three-level explosive valve be divided by front end to the rear end of the galvanized pipe, the expanded capsule it
Between the galvanized pipe tube body on the explosive valve that is arranged by front end to the rear end of the galvanized pipe to be divided into second level quick-fried
Broken valve, level Four explosive valve.
The soft suitable coal bed drilling multistage on-line pressure sealant survey of overlength is carried out using above-mentioned device the present invention also provides a kind of
The method of pressure includes the following steps: 1) overlength drilling machine drilling, reserves pressure measuring chamber space；By described in the feeding of the drilling rod center
Pressure measuring unit continues to be fed into after the inner core that the hole sealing device front end opens the drilling rod front end detachable PDC drill bit
The pressure measuring unit；It is then log out drilling rod, the pressure measuring unit stays in drilling predetermined position；
2) pressure measuring unit injects high pressure sealing of hole slurries into the galvanized pipe by the grouting pump, from the opening
First segment expanded capsule distending is sealed drilling front end by place's outflow；
3) grouting pressure increases, and when reaching the level-one explosive valve predetermined value, which is opened, and the second section expanded capsule is swollen
Swollen, at this moment grouting pressure continues to increase, and when reaching second level explosive valve predetermined value, which is opened, in two section expansion glue scrotiform of front and back
At confined space in slip casting, formed sealing；
4) when grouting pressure reaches the three-level explosive valve predetermined value, which is opened, the expansion of third section expanded capsule, when
When grouting pressure reaches level Four explosive valve predetermined value, which is opened, the band in the confined space that two section expanded capsule of front and back is formed
Pressure grouting；Then grouting with pressure is successively carried out in the order described above；
5) after the completion of slip casting, sealing is completed after grout cures, can carry out gas pressure by the pressure gauge of installation
Power measurement.
It is described after the card thorn passes through the drill bit after being sent into the pressure measuring unit in step 1) in above-mentioned method
Card thorn is opened under the action of the spring force, is stuck on the wall of a borehole；
In step 1) after the pressure measuring unit is stuck on the wall of a borehole, drilling rod is exited.
In above-mentioned method, in step 5), after the completion of slip casting, the cut-off of the accumulator of the grouting pump connection is closed
Valve.
In above-mentioned method, the pressure of the injection cement slurry can be 0~2MPa in step 2)；
In step 3), inject the cement slurry pressure can for 2~4MPa, the raised pressure difference of every grade of slip casting is 1~
4MPa；
In step 4), when the pressure for injecting the cement slurry can be 4~6MPa, the raised pressure difference of every grade of slip casting is 1~
4MPa。
The invention has the following advantages that
It does not need to be sent into pressure measuring unit after exiting drilling rod, avoids pressure measuring unit and send problem not in place；Simultaneously by more
Grade slip casting sealing solves too long, the problem that slip casting is not in place, grouting pressure penetration radius is too small that drills.
Detailed description of the invention
Fig. 1 is using the schematic diagram for being sent into drilling when apparatus of the present invention.
Fig. 2 is the schematic diagram that pressure is surveyed using sealing when apparatus of the present invention.
In Fig. 1-2, each label is as follows:
The detachable PDC drill bit of 1 inner core；2 drilling rods；3 pressure measuring units；4 air inlet heads；5 air inlets；6 air through hole；7 card thorns；8
Spring；9 expanded capsules；10 openings；11 level-one explosive valves；12 second level explosive valves；13 three-level explosive valves；14 level Four explosive valves；15
Gas pipeline；16 three-way interfaces；17 grouting pumps；18 pressure gauges；19 drillings；20 coal seams；21 galvanized pipes；22 accumulators；23 cut-offs
Valve.
Specific embodiment
Experimental method used in following embodiments is conventional method unless otherwise specified.
The materials, reagents and the like used in the following examples is commercially available unless otherwise specified.
Invention is further explained with reference to the accompanying drawing, but the invention is not limited to following embodiments.
As shown in Figs. 1-2, a kind of soft suitable coal bed drilling multistage on-line pressure sealant pressure measuring unit of overlength of the present invention, it includes surveying
3 ontology of pressure device；
Pressure measuring unit 3 includes galvanized pipe 21, gas pipeline 15, grouting pump 17 and pressure gauge 18；The top of galvanized pipe 21 is set
Set air inlet head 4；Multiple expanded capsules 9 are arranged in interval on the tube body of galvanized pipe 21, in the front end first segment expansion glue of galvanized pipe 21
The tube body of galvanized pipe 21 in capsule 9 is equipped with opening 10；On the tube body of the galvanized pipe 21 in remaining expanded capsule 9 and expand
It is respectively provided with explosive valve on the tube body of galvanized pipe 21 between capsule 9, the explosive valve of the setting in remaining expanded capsule 9 is by galvanized pipe
21 front end to rear end is divided into level-one explosive valve 11, three-level explosive valve 13 to 2n+1 grades of explosive valves, between expanded capsule
The explosive valve being arranged on the tube body of galvanized pipe is divided into second level explosive valve 12, level Four explosive valve by front end to the rear end of galvanized pipe
14 to 2n grades of explosive valves；
Grouting pump 17 is connected on the rear end nozzle of galvanized pipe 21；
Gas pipeline 15 is arranged in the inside of galvanized pipe 21, connects in one end of the gas pipeline 15 of the rear end nozzle of galvanized pipe
Pressure gauge 18.
Further, the integer that n is 0~4；
Multiple card thorns 7 are arranged in the front end of galvanized pipe 21；
Spring 8 is arranged in the side relative to air inlet head of card thorn 7, keeps card thorn 7 scalable.
Further, multiple air inlets 5 are set at the front end of the nearly air inlet head 4 of galvanized pipe 21；
Further, multiple air through hole 6 are set at the nearly air inlet 5 in the top of galvanized pipe 21.
Further, on the rear end nozzle of galvanized pipe 21 connect a three-way interface 16, three-way interface 16 other two
A connection grouting pump 17 in interface stretches out gas pipeline 15 in another interface deeply.
Further, it is stretched out in three-way interface 16 on the interface of gas pipeline 15 and multiple air through hole 6 is set.
Further, accumulator 22 is equipped between grouting pump 17 and the nozzle of galvanized pipe 21, accumulator is equipped with shut-off valve 23.
Further, specific settable 3 expanded capsules 9 are spaced on the tube body of galvanized pipe 21, in the front end of galvanized pipe 21
The tube body of galvanized pipe in first expanded capsule is equipped with opening 10；The explosive valve of setting in remaining expanded capsule 9 is by plating
The front end of zinc pipe 21 to rear end is divided into level-one explosive valve 11, three-level explosive valve 13, the galvanized pipe 21 between expanded capsule 9
The explosive valve being arranged on tube body is divided into second level explosive valve 12, level Four explosive valve 14 by front end to the rear end of galvanized pipe 21.
As shown in Figure 1, the step of being sent into drilling is as follows:
(1) overlength drilling machine creeps into out 2-3 meters, reserves pressure measuring chamber space；
(2) pressure measuring unit 3 is sent by 2 center of drilling rod, when the inner core that 3 front end of hole sealing device opens 2 front end of drilling rod can take off
After formula PDC drill bit 1, hole sealing device 3 is continued to be fed into；
(3) after shrinkable card thorn 7 passes through drill bit 1, card thorn 7 is opened under spring force, is stuck on the wall of a borehole；
(4) drilling rod at this moment is exited by root, pressure measuring unit 3 has been left in drilling predetermined position.
As shown in Fig. 2, pressure is surveyed in sealing, specific step is as follows:
(1) pressure measuring unit rear end in the borehole is stayed to connect threeway 16, grouting pump 17；
(2) high pressure sealing of hole slurries (pressure is up to 2MPa) are injected into galvanized pipe 21 by grouting pump 17, from being open from 10
9 distending of first segment expanded capsule is sealed drilling front end by outflow；
(3) grouting pressure increases (concretely 2~4MPa, the raised pressure difference of every grade of slip casting are 1~4MPa), reaches one
When grade 11 predetermined value of explosive valve, which is opened, and the expansion of the second section expanded capsule 9, at this moment grouting pressure continues to increase, and reaches second level
When 12 predetermined value of explosive valve, which is opened, and the slip casting in the confined space that two section expanded capsule of front and back is formed forms sealing；
(4) when grouting pressure reaches 13 predetermined value of three-level explosive valve (concretely 4~6MPa, the raised pressure of every grade of slip casting
Power difference is 1~4MPa) when, which opens, and third section expanded capsule 9 expands, and makes a reservation for when grouting pressure reaches level Four explosive valve 14
When value, which is opened, the grouting with pressure in the confined space that two section expanded capsule of front and back is formed；
(5) after the completion of slip casting, the valve 23 for the accumulator 22 that grouting pump 17 connects, after grout cures, Ji Kean are closed
Pressure gauge 18 is filled, gas pressure measurement is carried out.
Claims (11)
1. a kind of soft suitable coal bed drilling multistage on-line pressure sealant pressure measuring unit of overlength, it is characterised in that: it includes pressure measuring unit sheet
Body；
The pressure measuring unit includes galvanized pipe, gas pipeline, grouting pump and pressure gauge；Air inlet is arranged in the top of the galvanized pipe
Head；Multiple expanded capsules, the expansion glue described in the front end first segment of the galvanized pipe is arranged in interval on the tube body of the galvanized pipe
The tube body of the intracapsular galvanized pipe is equipped with opening；On the tube body of the galvanized pipe in remaining described expanded capsule and
It is respectively provided with explosive valve on the tube body of the galvanized pipe between the expanded capsule, the institute of the setting in remaining described expanded capsule
It states explosive valve and level-one explosive valve, three-level explosive valve to 2n+1 grades of explosive valves is divided by front end to the rear end of the galvanized pipe,
The explosive valve being arranged on the tube body of the galvanized pipe between the expanded capsule by the galvanized pipe front end to rear end
It is divided into second level explosive valve, level Four explosive valve to 2n+2 grades of explosive valves；
The grouting pump is connected on the rear end nozzle of the galvanized pipe；
The gas pipeline is arranged in the inside of the galvanized pipe, in the one of the gas pipeline of the rear end nozzle of the galvanized pipe
End connects the pressure gauge.
2. the apparatus according to claim 1, it is characterised in that: the integer that n is 0~4；
Multiple card thorns are arranged in the front end of the galvanized pipe；
Spring is arranged in the side relative to the air inlet head of the card thorn, keeps the card thorn scalable.
3. device according to claim 1 or 2, it is characterised in that: at the front end of the nearly air inlet head of the galvanized pipe
Multiple air inlets are set；
Multiple air through hole are arranged in the nearly air inlet position in the top of the galvanized pipe.
4. device according to any one of claim 1-3, it is characterised in that: connected on the rear end nozzle of the galvanized pipe
One three-way interface, the connection grouting pump in other two interface of the three-way interface are stretched deeply in another interface
The gas pipeline out.
5. device described in any one of -4 according to claim 1, it is characterised in that: stretch out the gas in the three-way interface
Multiple air through hole are set on the interface of pipeline.
6. device according to any one of claims 1-5, it is characterised in that: the pipe of the grouting pump and the galvanized pipe
Accumulator is equipped between mouthful, the accumulator is equipped with shut-off valve.
7. device according to claim 1 to 6, it is characterised in that: be spaced setting on the tube body of the galvanized pipe
3 expanded capsules are equipped on the tube body of the galvanized pipe in the expanded capsule of the front end of the galvanized pipe first and open
Mouthful；It is quick-fried that the explosive valve of setting in remaining described expanded capsule by front end to the rear end of the galvanized pipe is divided into level-one
Valve, three-level explosive valve are broken, the explosive valve being arranged on the tube body of the galvanized pipe between the expanded capsule is by the plating
The front end of zinc pipe to rear end is divided into second level explosive valve, level Four explosive valve.
8. a kind of carry out the soft suitable coal bed drilling multistage on-line pressure sealant of overlength using device of any of claims 1-7
The method for surveying pressure includes the following steps: 1) overlength drilling machine drilling, reserves pressure measuring chamber space；Institute is sent by the drilling rod center
Pressure measuring unit is stated, after the inner core that the hole sealing device front end opens the drilling rod front end detachable PDC drill bit, continues to send
Enter the pressure measuring unit；It is then log out drilling rod, the pressure measuring unit stays in drilling predetermined position；
2) pressure measuring unit injects high pressure sealing of hole slurries into the galvanized pipe by the grouting pump, from the opening stream
Out by first segment expanded capsule distending, drilling front end is sealed；
3) grouting pressure increases, and when reaching the level-one explosive valve predetermined value, which is opened, the expansion of the second section expanded capsule, this
When grouting pressure continue to increase, when reaching second level explosive valve predetermined value, the valve open, in front and back two section expanded capsules formed it is close
Slip casting in space is closed, sealing is formed；
4) when grouting pressure reaches the three-level explosive valve predetermined value, which is opened, and slip casting is worked as in the expansion of third section expanded capsule
When pressure reaches level Four explosive valve predetermined value, which is opened, the band pressure injection in the confined space that two section expanded capsule of front and back is formed
Slurry；Then grouting with pressure is successively carried out in the order described above；
5) after the completion of slip casting, sealing is completed after grout cures, can carry out gas pressure survey by the pressure gauge of installation
It is fixed.
9. according to the method described in claim 8, it is characterized by: in step 1), card after being sent into the pressure measuring unit
After the excessively described drill bit of transfixation, the card thorn is opened under the action of the spring force, is stuck on the wall of a borehole；
In step 1) after the pressure measuring unit is stuck on the wall of a borehole, drilling rod is exited.
10. method according to claim 8 or claim 9, it is characterised in that: in step 5), after the completion of slip casting, close the slip casting
Pump the shut-off valve of the accumulator of connection.
11. the method according to any one of claim 8-10, it is characterised in that: the injection cement slurry in step 2)
Pressure is 0~2MPa；
In step 3), the pressure for injecting the cement slurry is 2~4MPa, and the raised pressure difference of every grade of slip casting is 1~4MPa；
In step 4), when the pressure for injecting the cement slurry is 4~6MPa, the raised pressure difference of every grade of slip casting is 1~4MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811200994.6A CN109162703B (en) | 2018-10-16 | 2018-10-16 | Super-long soft coal seam drilling multi-stage pressure sealing pressure measuring device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811200994.6A CN109162703B (en) | 2018-10-16 | 2018-10-16 | Super-long soft coal seam drilling multi-stage pressure sealing pressure measuring device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109162703A true CN109162703A (en) | 2019-01-08 |
| CN109162703B CN109162703B (en) | 2022-05-03 |
Family
ID=64878227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811200994.6A Active CN109162703B (en) | 2018-10-16 | 2018-10-16 | Super-long soft coal seam drilling multi-stage pressure sealing pressure measuring device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109162703B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665473A (en) * | 2020-12-10 | 2021-04-16 | 中煤科工开采研究院有限公司 | Blasting hole sealing method |
| CN112983344A (en) * | 2019-12-17 | 2021-06-18 | 北京大地高科地质勘查有限公司 | Novel grouting drill rod and using method thereof |
| CN115095296A (en) * | 2022-06-09 | 2022-09-23 | 华晋焦煤有限责任公司 | Multi-section type blasting airbag grouting hole sealing device and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983344A (en) * | 2019-12-17 | 2021-06-18 | 北京大地高科地质勘查有限公司 | Novel grouting drill rod and using method thereof |
| CN112665473A (en) * | 2020-12-10 | 2021-04-16 | 中煤科工开采研究院有限公司 | Blasting hole sealing method |
| CN115095296A (en) * | 2022-06-09 | 2022-09-23 | 华晋焦煤有限责任公司 | Multi-section type blasting airbag grouting hole sealing device and method |
| CN115095296B (en) * | 2022-06-09 | 2024-04-05 | 华晋焦煤有限责任公司 | Multistage blasting air bag grouting hole sealing device and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109162703B (en) | 2022-05-03 |
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