CN105064971B - A kind of high pressure nitrogen blast cracking anti-reflection experimental device and method - Google Patents
A kind of high pressure nitrogen blast cracking anti-reflection experimental device and method Download PDFInfo
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- CN105064971B CN105064971B CN201510568271.1A CN201510568271A CN105064971B CN 105064971 B CN105064971 B CN 105064971B CN 201510568271 A CN201510568271 A CN 201510568271A CN 105064971 B CN105064971 B CN 105064971B
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 203
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 100
- 238000005336 cracking Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 90
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 16
- 239000010935 stainless steel Substances 0.000 claims abstract description 16
- 230000000694 effects Effects 0.000 claims abstract description 12
- 238000005422 blasting Methods 0.000 claims abstract description 6
- 238000004880 explosion Methods 0.000 claims description 27
- 238000002474 experimental method Methods 0.000 claims description 4
- 239000003034 coal gas Substances 0.000 claims description 3
- 239000003245 coal Substances 0.000 abstract description 4
- 239000004568 cement Substances 0.000 description 9
- 230000001914 calming effect Effects 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- WVAKRQOMAINQPU-UHFFFAOYSA-N 2-[4-[2-[5-(2,2-dimethylbutyl)-1h-imidazol-2-yl]ethyl]phenyl]pyridine Chemical compound N1C(CC(C)(C)CC)=CN=C1CCC1=CC=C(C=2N=CC=CC=2)C=C1 WVAKRQOMAINQPU-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 238000001028 reflection method Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of high pressure nitrogen blast cracking anti-reflection experimental device and method, belong to coal seam gas blast cracking anti-reflection experimental device and method.Device includes nitrogen cylinder, air compressor, gas boosting pump, high pressure gas bag, triaxial pressure experimental machine；Gas boosting pump is connected by flexible pipe with air compressor, nitrogen cylinder；High pressure gas is wrapped equipped with pressure gauge and safety valve, and one end is connected by stainless steel airway tube with gas boosting pump, and the other end is connected with being equipped with by the triaxial cell of quick-fried medium by soft air-guide pipe；Pneumatic valve is housed on the soft air-guide pipe between high pressure gas bag and triaxial cell；Method, nitrogen cylinder produces nitrogen, is stored in through supercharging in high pressure gas bag, when the pressure in gas bag reaches, Pneumatic valve, high pressure nitrogen instantaneous relase are opened, fracturing is carried out by quick-fried medium to stand under load, different volumes high pressure gas bag realizes nitrogen split blasting under different pressures, different volumes.Present apparatus simple and convenient, obtains blast cracking effect under different pressures, different volumes high pressure nitrogen.
Description
Technical field
The present invention relates to a kind of coal seam gas blast cracking anti-reflection experimental device and method, particularly a kind of elevated pressure nitrogen gas explosion
Broken fracturing anti-reflection experimental device and method.
Background technology
It is anti-reflection except taking waterpower measure and Deephole pre-splitting blasting measure to carry out coal seam for single hypotonicity coal seam
Outside, a kind of high pressure pneumatic component fracturing anti-reflection method has been developed again in recent years.Measure no-spark that high pressure pneumatic component fracturing is anti-reflection,
Safe, pressure controllable.
At present, the anti-reflection technology of high pressure nitrogen blast cracking is in the application also in the starting stage, especially to nitrogen gas
The anti-reflection mechanism of action not yet carries out system research.Existing experimental study is caused primarily with regard to high pressure nitrogen explosion under different pressures
Effect is split, influence of the nitrogen volume to fracturing effect is not considered.
The content of the invention
The invention aims to provide a kind of high pressure nitrogen blast cracking anti-reflection experimental device and method, volume phase is realized
With and pressure is different or pressure is identical and high pressure nitrogen blast cracking is anti-reflection under the different two kinds of experimental programs of volume.
The object of the present invention is achieved like this：High pressure nitrogen blast cracking anti-reflection experimental device, including nitrogen cylinder, sky
Air compressor and gas booster pump constitute the pressure source of high pressure nitrogen explosion, and high pressure gas bag one end passes through stainless steel airway tube and gas
Body booster pump is connected, and the other end is connected by being provided with the soft air-guide pipe of Pneumatic valve with the triaxial cell of triaxial pressure experimental machine
Connect；It is connected with stainless steel airway tube trunk roads on gas meter, stainless steel airway tube branch road and is respectively arranged with control valve and high pressure gas bag,
Wrapped in high pressure gas and pressure gauge and safety valve are installed, be placed on by quick-fried medium in triaxial pressure room, its size is by triaxial cell
Scope determine.
Described stainless steel airway tube branch road, which has, high pressure gas bag, respectively the first high pressure gas on three, every branch road
Bag, the second high pressure gas bag and the 3rd high pressure gas bag.
High pressure nitrogen blast cracking anti-reflection experimental method：Nitrogen is controlled using high pressure nitrogen blast cracking anti-reflection experimental device
Pressure and nitrogen volume, realize that high pressure nitrogen is caused under two kinds of experimental programs of same volume different pressures and uniform pressure different volumes
Split explosion；
Specific method is：After the nitrogen produced by nitrogen cylinder is pressurized through gas boosting pump, first by the first control valve,
High pressure nitrogen is filled with to design pressure P to the first high pressure gas bag1, the reading changing value V of this process gas meter is write down, gas control is opened
Valve, high pressure nitrogen by instantaneous relase, under blast cracking stress loading by quick-fried medium；Secondly, by the second control valve, to second
Nitrogen is filled with high pressure gas bag, when coal gas meter reading change is similarly V, the change of high pressure gas inclusion product, the second high pressure gas bag
Interior nitrogen pressure is P2, Pneumatic valve is opened, implements the second separate explosion；Finally, the 3rd is passed through according to step described in the second separate explosion
Control valve is filled with the nitrogen that volume is similarly V into the 3rd high pressure gas bag, and now pressure is P3, implement third time explosion；Pass through
Three branch road explosions successively on stainless steel airway tube, can obtain high pressure nitrogen blast cracking under same volume, different pressures
Effect；To obtain nitrogen pressure in high pressure nitrogen blast cracking effect under uniform pressure, different volumes, three high pressure gas bags of control
Identical, other blast cracking processes are ibid.
Beneficial effect, as a result of such scheme, the present invention can be realized identical using the change of high pressure gas inclusion product
High pressure nitrogen split blasting under volume different pressures, uniform pressure different volumes, to observe their influences to demolition effect.Profit
With the high pressure nitrogen blast cracking anti-reflection experimental device and method, show that nitrogen volume and nitrogen pressure can all influence in various degree
By sudden and violent medium fractured situation, contribute to the crack of further the stress wave propagation rule of understanding explosion generation and fracturing rock mass
Propagation law, further discloses high pressure nitrogen blast action mechanism.The high pressure nitrogen demolition set changes high pressure gas inclusion product can
Strong operability, using simple and convenient, stability is strong, safe and reliable, with wide applicability.
Brief description of the drawings：
Fig. 1 is structure drawing of device of the invention.
In figure, 1, nitrogen cylinder；2nd, air compressor；3 be gas boosting pump；4th, the first control valve；8th, the second control valve；
12nd, the 3rd control valve；5th, first pressure table；9th, second pressure table；13rd, the 3rd pressure gauge；6th, 2 bag of calming the anger is raised；7th, the first peace
Full valve；11st, the second safety valve；15th, the 3rd safety valve；10th, 1.5 bag of calming the anger is raised；14th, 1 bag of calming the anger is raised；16th, Pneumatic valve；
17th, by quick-fried medium；18th, triaxial cell；19th, triaxial pressure experimental machine；20th, gas meter.
Embodiment
In Fig. 1, high pressure nitrogen blast cracking anti-reflection experimental device of the invention, including nitrogen cylinder 1, air compressor 2,
Gas boosting pump 3,2 liters of the first high pressure gas bag 6,1.5 liters of the second high pressure gas bag 10,1 liter of the 3rd high pressure gas bag 14, three axles
Pressure experiment machine 19；Nitrogen cylinder 1, air compressor 2 and gas booster pump 3 constitute the pressure of high pressure nitrogen explosion after connecting
Source, the input of three high pressure gas bags is connected by stainless steel airway tube with gas boosting pump 3, the output end of three high pressure gas bags
It is connected by Pneumatic valve 16 and soft air-guide pipe with the triaxial cell 18 of triaxial pressure experimental machine 19, the cavity of triaxial cell 18
Size length × width × height=25 × 25 × 31cm；It is provided with gas meter 20, three branch roads and divides on stainless steel airway tube trunk roads
Control valve is not installed, is the first control valve 4, the second control valve 8 and the 3rd control valve 12,2 liters first high is corresponded respectively to
Calm the anger bag 6,1.5 liters of the second high pressure gas bag 10 and 1 liter of the 3rd high pressure gas bag 14, and wrap be provided with each high pressure gas respectively
Pressure gauge and safety valve, are first pressure table 5, second pressure table 9, the 3rd pressure gauge 13 and the first safety valve 7, the second safety valve
11st, the 3rd safety valve 15；Be placed on by quick-fried medium 17 in triaxial cell 18, by the quick-fried size of medium 17 by triaxial cell scope
It is determined that.
Described stainless steel airway tube branch road, which has, high pressure gas bag, respectively the first high pressure gas on three, every branch road
Bag 6, the second high pressure gas bag 10 and the 3rd high pressure gas bag 14.High pressure nitrogen blast cracking anti-reflection experimental method：Utilize high pressure nitrogen
Blast cracking anti-reflection experimental device controls nitrogen pressure and nitrogen volume, realizes that same volume different pressures are different with uniform pressure
High pressure nitrogen split blasting under two kinds of experimental programs of volume；
Specific method is：After the nitrogen produced by nitrogen cylinder is pressurized through gas boosting pump, pass through the first control valve first
4, high pressure nitrogen is filled with to design pressure P to the first high pressure gas bag 61, the reading changing value V of this process gas meter 20 is write down, is opened
Open Pneumatic valve 16, high pressure nitrogen by instantaneous relase, under blast cracking stress loading by quick-fried medium 17；Secondly, the second control is passed through
Valve 8 processed, nitrogen is filled with into the second high pressure gas bag 10, when coal gas meter reading change is similarly V, the change of high pressure gas inclusion product
Change, nitrogen pressure is P in the second high pressure gas bag 102, Pneumatic valve 16 is opened, implements the second separate explosion；Finally, it is quick-fried according to second
Break the step and the nitrogen that volume is similarly V is filled with into the 3rd high pressure gas bag 14 by the 3rd control valve 12, now pressure is
P3, implement third time explosion；By three branch road explosions successively on stainless steel airway tube, same volume can be obtained, it is different
High pressure nitrogen blast cracking effect under pressure；To obtain high pressure nitrogen blast cracking effect under uniform pressure, different volumes, control
Nitrogen pressure is identical in three high pressure gas bags, and other blast cracking processes are ibid.
Below by embodiment combination accompanying drawing, the invention will be further described：
Embodiment 1：Using cement specimen as exemplified by by quick-fried medium 17, the specifically used method of experimental provision of the invention is：
1st, with stone, cement, sand as cast material, mutually match, produce compression strength for 1.97MPa, tension is strong
5 pieces altogether of the cube cement specimen 17 for 0.19MPa is spent, the size of cement specimen 17 makes it to be put into triaxial cell just
In 18.
2nd, the sealing material such as water in advance mud, resin solidifies soft air-guide pipe one end in the gas explosion hole outside triaxial cell 18
Interior, the soft air-guide pipe other end passes through socket connection with high pressure gas bag.
3rd, triaxial pressure experimental machine 19 carries out horizontal and vertical directions stress loading to cement specimen 17, when cement examination
The axle pressure that part 17 is loaded is 1.0MPa, when confined pressure is 0.5MPa, stops loading.
4th, experimental provision is assembled into according to connection request described above, connects the power supply of air compressor 2, open nitrogen cylinder
1 and gas booster pump 3 be filled with nitrogen into high pressure gas bag.The first step, opens control valve 4, to the inflated with nitrogen of high pressure gas bag 6, works as pressure
The reading of power table 5 reaches 7.5MPa, closing control valve 4 and nitrogen cylinder 1, and the reading changing value for writing down now gas meter 20 is 1
Rise, then open Pneumatic valve 16, high pressure nitrogen is by instantaneous relase, the cement specimen 17 under blast cracking stress loading；Second step,
Cement specimen is changed, is reconnected according to above-mentioned steps, nitrogen cylinder 1 and control valve 8 are opened, to the nitrogen charging of high pressure gas bag 10
Gas, when the reading of gas meter 20, which equally becomes, turns to 1 liter, closing control valve 8 and nitrogen cylinder 1, now the reading of pressure gauge 9 be
10MPa, then opens Pneumatic valve 16, implements the second separate explosion；3rd step, control valve is passed through according to step described in the second separate explosion
12 are filled with the nitrogen (reading of pressure gauge 13 is 15MPa) that volume is similarly 1 liter into high pressure gas bag 14, implement third time explosion.
4th step, changes cement specimen, has reconnected experimental provision, connects the power supply of air compressor 2, opens nitrogen cylinder 1, gas
Booster pump 3 and control valve 8, to the inflated with nitrogen of high pressure gas bag 10, when the reading of pressure gauge 9 reaches 7.5MPa, closing control valve 8 and nitrogen
Gas cylinder 1, the reading changing value for writing down gas meter is 0.75 liter, then opens Pneumatic valve 16, implements the 4th separate explosion；5th
Step, is filled with nitrogen to high pressure gas bag 14 by control valve 12 according to the 4th quick-fried step, is similarly to the reading of pressure gauge 13
During 7.5MPa (the reading changing value of gas meter is 0.5 liter), closing control valve 12 opens Pneumatic valve 16, implements the 5th separate explosion.
By first, second and third separate explosion, it is 1 liter of nitrogen that can obtain volume, and nitrogen pressure is respectively 7.5MPa, 10MPa
With high pressure nitrogen blast cracking effect under 15MPa.By first, fourth, five separate explosions, nitrogen pressure can be obtained for 7.5MPa,
Nitrogen volume integral Wei not 1 liter, 0.75 liter and 0.5 liter lower high pressure nitrogen blast cracking effect.
Claims (2)
1. a kind of high pressure nitrogen blast cracking anti-reflection experimental device, it is characterized in that：High pressure nitrogen blast cracking anti-reflection experimental device
The pressure source of high pressure nitrogen explosion is constituted including nitrogen cylinder, air compressor and gas booster pump, high pressure gas bag one end passes through
Stainless steel airway tube is connected with gas boosting pump, and the other end is by being provided with the soft air-guide pipe of Pneumatic valve and triaxial pressure experimental machine
Triaxial cell connection；It is connected with stainless steel airway tube trunk roads on gas meter, stainless steel airway tube branch road and is respectively arranged with control
Valve processed and high pressure gas bag, wrap in high pressure gas and are provided with pressure gauge and safety valve, are placed on by quick-fried medium in triaxial pressure room, its chi
It is very little to be determined by the scope of triaxial cell；Described stainless steel airway tube branch road, which has on three, every branch road, high pressure gas bag,
Respectively the first high pressure gas bag, the second high pressure gas bag and the 3rd high pressure gas bag, are filled using the anti-reflection experiment of high pressure nitrogen blast cracking
Control nitrogen pressure and nitrogen volume are put, by three branch road explosions successively on stainless steel airway tube, realizes same volume not
With high pressure nitrogen split blasting under two kinds of experimental programs of pressure and uniform pressure different volumes.
2. a kind of method of high pressure nitrogen blast cracking anti-reflection experimental device described in claim 1, it is characterized in that：Utilize high pressure
Nitrogen blast cracking anti-reflection experimental device controls nitrogen pressure and nitrogen volume, realizes same volume different pressures and uniform pressure
High pressure nitrogen split blasting under two kinds of experimental programs of different volumes；
Specific method is：After the nitrogen produced by nitrogen cylinder is pressurized through gas boosting pump, first by the first control valve, to the
One high pressure gas bag is filled with high pressure nitrogen to design pressure P1, the reading changing value V of this process gas meter is write down, Pneumatic valve is opened,
High pressure nitrogen by instantaneous relase, under blast cracking stress loading by quick-fried medium；Secondly, it is high to second by the second control valve
Calm the anger and be filled with nitrogen in wrapping, when coal gas meter reading change is similarly V, because of the change that high pressure gas inclusion is accumulated, the second high pressure gas bag
Interior nitrogen pressure is P2, Pneumatic valve is opened, implements the second separate explosion；Finally, the 3rd is passed through according to step described in the second separate explosion
Control valve is filled with the nitrogen that volume is similarly V into the 3rd high pressure gas bag, and now pressure is P3, implement third time explosion；Pass through
Three branch road explosions successively on stainless steel airway tube, can obtain high pressure nitrogen blast cracking under same volume, different pressures
Effect；To obtain nitrogen pressure in high pressure nitrogen blast cracking effect under uniform pressure, different volumes, three high pressure gas bags of control
Identical, other blast cracking processes are ibid.
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| CN105486628B (en) * | 2015-12-21 | 2018-05-22 | 中国科学院力学研究所 | A kind of gases at high pressure fragmentation iron ore experimental rig |
| CN105865929B (en) * | 2016-03-30 | 2019-01-04 | 中国科学院力学研究所 | A kind of rock type materials cracking properties pilot system and method |
| CN106226022A (en) * | 2016-08-31 | 2016-12-14 | 济南市人防建筑设计研究院有限责任公司 | A kind of underground civil defense engineering anti-nuclear blast experimental system for simulating and experimental technique |
| CN113686749A (en) * | 2021-08-11 | 2021-11-23 | 煤炭科学技术研究院有限公司 | High-pressure gas jet punching coal rock breaking fracturing permeability increasing experimental device and method |
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| CN102967544B (en) * | 2012-12-04 | 2015-01-07 | 核工业北京地质研究院 | Device for gas test and application thereof |
| CN103234890B (en) * | 2013-04-22 | 2015-02-18 | 辽宁工程技术大学 | Low-permeability coal high-pressure gas cycle pulse fracturing anti-reflection experimental device |
| CN104061014B (en) * | 2014-07-07 | 2016-03-02 | 太原理工大学 | A kind of coal seam anti-reflection experimental device based on high electric field pulse |
| CN104406895A (en) * | 2014-11-18 | 2015-03-11 | 河南理工大学 | Novel coal bed permeability testing device and method |
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