CN110529107A - Coal seam strain, seepage flow, displacement and jet stream integrated experiment device and method - Google Patents
Coal seam strain, seepage flow, displacement and jet stream integrated experiment device and method Download PDFInfo
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- CN110529107A CN110529107A CN201910824250.XA CN201910824250A CN110529107A CN 110529107 A CN110529107 A CN 110529107A CN 201910824250 A CN201910824250 A CN 201910824250A CN 110529107 A CN110529107 A CN 110529107A
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- 239000003245 coal Substances 0.000 title claims abstract description 178
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 79
- 238000002474 experimental method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title description 4
- 238000012360 testing method Methods 0.000 claims abstract description 70
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000007789 sealing Methods 0.000 claims abstract description 36
- 238000005259 measurement Methods 0.000 claims abstract description 31
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 17
- 239000002274 desiccant Substances 0.000 claims abstract description 13
- 239000007789 gas Substances 0.000 claims description 200
- 238000003825 pressing Methods 0.000 claims description 49
- 229910000831 Steel Inorganic materials 0.000 claims description 40
- 239000010959 steel Substances 0.000 claims description 40
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 22
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims description 22
- 229920002530 polyetherether ketone Polymers 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 17
- 238000009434 installation Methods 0.000 claims description 13
- 238000004088 simulation Methods 0.000 claims description 13
- 239000011888 foil Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000010276 construction Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000007921 spray Substances 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 230000008595 infiltration Effects 0.000 abstract description 3
- 238000001764 infiltration Methods 0.000 abstract description 3
- 239000000047 product Substances 0.000 description 11
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000013467 fragmentation Methods 0.000 description 2
- 238000006062 fragmentation reaction Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000003381 stabilizer Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 241000790917 Dioxys <bee> Species 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000002604 ultrasonography Methods 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/166—Injecting a gaseous medium; Injecting a gaseous medium and a liquid medium
- E21B43/168—Injecting a gaseous medium
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- 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
- E21B47/10—Locating fluid leaks, intrusions or movements
-
- 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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of coal seam strain, seepage flow, displacement and jet stream integrated experiment devices, including coal ventricle, vibrator, supersonic generator, methane gas source, seepage flow displacement gas source, hand pump, Instrument Measuring Resistivity of Carbon Products, air accumulator, Pneumatic valve, rupture disk component, release cylinder, pressure sensor, high pressure valve, desiccant, gas flowmeter, strain measurement sealing container and deformeter.Meanwhile the present invention also provides a kind of coal seam strain, seepage flow, displacement and jet stream comprehensive testing methods, including the test of equipment leak test, high pressure gas seepage tests, high pressure gas displacement experiment, high-pressure gas jet, determination of resistivity test, large compressive strain measurement.The test for the fracturing coal sample that succeeds again is permeated after the coal heart for carrying out gas, while also can be carried out the determination of resistivity and the measurement of coal seam large compressive strain of coal sample gas displacement experiment, the coal heart under high pressure and gas infiltration, makes test result closer to real conditions.
Description
Technical field
The invention belongs to coal sample comprehensive test device and methods, permeate the fracturing coal that succeeds again after the coal heart for carrying out gas
The test of sample, at the same also can be carried out coal sample gas displacement experiment, the coal heart high pressure and gas infiltration under determination of resistivity and
The measurement of coal seam large compressive strain, makes test result closer to real conditions.
Background technique
Gas flow refers to flowing of the gas in porous media.The difference of the essence of gas flow and liquid seepage is
Gas has biggish compressibility, and in flow event, volume changes with temperature and pressure etc..Gas jet refers to gas
The flowing projected from nozzle, aperture, slit.For seam mining, coal seam is in subterranean layer, unavoidably by gas etc.
Gas flow usually carries out seam mining using gas jet fracturing, or in exploitation advance promoting the circulation of qi body displacement, facilitates methane gas
Extraction, it is therefore necessary to carry out gas flow test, gas jet, gas displacement, coal seam strain and resistivity measurement,
For instructing coal seam safety and high efficiency.
Now currently, commonly using test piece box in laboratory to simulate seepage tests of the various gases in coal sample, but existing
Test piece box experimental condition is also relatively limited, can not real simulation coal sample in factors such as different pressures, different temperatures and underground waves
Under the influence of underground real conditions.Meanwhile gas flow test, gas jet test individually carry out, and result in waste of resources.
Summary of the invention
The limitation of seepage tests of the various gases in coal sample is simulated for now current test piece box, and gas flow is tested
Individually carry out the defect of waste of resource with stream test, the present invention is quasi- to be provided a kind of coal seam strain, seepage flow, displacement and jet stream and integrate
Experimental rig, can truer simulation coal sample under different pressures, different temperatures and the underground underground Bo Deng real conditions
Gas flow situation, and gas jet test, gas displacement experiment, strain measurement and resistivity measurement can be carried out simultaneously, with section
About resource.
For this purpose, the technical scheme adopted by the invention is as follows: a kind of coal seam strain, seepage flow, displacement and jet stream compbined test dress
Set, including coal ventricle, vibrator, supersonic generator, methane gas source, seepage flow displacement gas source, hand pump, Instrument Measuring Resistivity of Carbon Products,
Air accumulator, Pneumatic valve, rupture disk component, release cylinder and strain measurement sealing container, the methane gas source, seepage flow displacement gas source are logical
The left side that air inlet pipeline is connected in parallel on coal ventricle is crossed, and can be respectively the coal chambers of the heart offer methane gas, seepage flow displacement gas of coal ventricle
Body, methane gas source, seepage flow displacement gas source are each provided with a high pressure valve and share a pressure sensor, and the right side of coal ventricle is logical
It crosses gas exhaust piping and is connected with pressure sensor, high pressure valve, desiccant and gas flowmeter in turn；The vibrator is mounted on the coal heart
The left end of room provides vibration for coal ventricle, and supersonic generator, which is mounted on coal ventricle, provides ultrasonic wave, the hand for coal ventricle
It shakes pump and provides circumferential pressure and axial compressive force for coal ventricle, the Instrument Measuring Resistivity of Carbon Products is used to measure the coal sample of coal ventricle in high pressure
And the resistivity under gas flow, the air accumulator passes through piping connection before the pressure sensor of gas exhaust piping, and air accumulator
Equipped with high pressure valve and blow valve, the gas is connected in turn by pipeline between the pressure sensor and high pressure valve of gas exhaust piping
Control valve, rupture disk component and release cylinder；The seepage flow displacement gas source can inject gas into strain measurement sealing container by pipeline
Body, the strain measurement sealing container pass through foil gauge interface and strain for holding the coal sample that foil gauge is posted in outer surface
Instrument is connected to read the strain parameter of coal sample, and the strain measurement sealing container is equipped with high pressure valve and blow valve, the strain
The inner cavity and the coal chambers of the heart for measuring sealing container are cylinder, and diameter is identical.
The coal ventricle includes round steel cylinder, circumferential pressure transmitting set, T-type end socket, PEEK as a preferred embodiment of the above solution,
Set, taper steel bushing, right piston set, right first pressing sleeve, right second pressing sleeve, left first pressing sleeve, left second pressing sleeve, the circumferential pressure
Transmitting is placed in round steel cylinder, and the outer diameter of circumferential pressure transmitting set is less than the internal diameter of round steel cylinder, and two T-type end sockets are between left and right
Every ground, the opposite circumferential pressure that is mounted on is transmitted in set, and the bar portion of each T-type end socket is respectively set with the PEEK set, circumferential direction pressure
The left and right ends portion diameter of power transmitting set becomes larger and combines sealing ring to push against sealing by tapered steel set, to pass in circumferential pressure
It passs and forms the cylindrical coal chambers of the heart between set, two T-type end sockets, transmitted in circumferential pressure and form circumferential pressure between set and round steel cylinder
Power applies chamber；After left first pressing sleeve is screwed onto the left end of round steel cylinder and is pushed against the taper steel bushing in left side, described left second
After the front end of pressing sleeve is screwed onto left first pressing sleeve and is pushed against the PEEK set in left side by circumferential cushion block；Right first pressing sleeve
After being screwed onto the right end of round steel cylinder and being pushed against the taper steel bushing on right side, right second pressing sleeve is installed in the rear of right first pressing sleeve,
After right piston set is pushed against the PEEK set on right side after right second pressing sleeve, right first pressing sleeve, the middle part of right piston set is provided with
Circumferential protrusion can simultaneously horizontally slip in the large diameter section of right second pressing sleeve, the interface conduct of right second pressing sleeve size internal diameter section
Right piston set moves to right termination confined planes；Setting there are two circumferential high pressure liquid interface and passes through pipeline on the side wall of the round steel cylinder
It is connected with hand pump, setting there are two axial high pressure liquid interface and passes through pipeline and hand pump phase on the side wall of right second pressing sleeve
Even, a seepage flow high pressure gas and Instrument Measuring Resistivity of Carbon Products PEEK insulating joint shared interface are each provided on two T-type end sockets.It is logical
The circumferential pressure of circumferential pressure sensor detection coal ventricle coal sample is crossed, axial compressive force sensor is used to survey the axial direction of coal ventricle coal sample
Pressure, the position of pressure acquisition point setting can ensure that acquisition data are really reasonable.
Further preferably, circumferential pressure sensor mounting hole, right second pressing sleeve are provided on the side wall of the round steel cylinder
Side wall on be provided with axial compressive force sensor mounting hole, and axial compressive force sensor mounting hole and axial high pressure liquid interface are distinguished
Positioned at the left and right sides of circumferential protrusion；Installation as supersonic generator is scabbled in part in the middle part of the lateral wall of the round steel cylinder
Platform, the vibrator are connected to the left end entrance of coal ventricle.
Further preferably, seepage flow high-pressure gas pipe, the high-pressure liquid tube being connected with the coal ventricle are hose, coal ventricle
It is placed in tepidarium.Water temperature can be according to circumstances adjusted, gas flow under different temperatures is carried out and tests.
Further preferably, the rupture disk component include rupture disk, rupture disk installation male connector, rupture disk installation female and
Rupture disk gasket installs male connector by rupture disk after the rupture disk, rupture disk gasket overlapping, rupture disk installation female is spirally connected pressure
Tightly wherein, it is installed in rupture disk and is additionally provided with sealing ring between male connector, rupture disk installation female.Using newly-designed simple quick-fried
Fragmentation component, significantly reduces experimentation cost.
Meanwhile the present invention also provides a kind of coal seam strain, seepage flow, displacement and jet stream comprehensive testing method, including it is above-mentioned
Coal seam strain, seepage flow, displacement and jet stream integrated experiment device, its step are as follows:
Step 1: equipment leak test
The simulation coal heart is put into the coal chambers of the heart of coal ventricle, sealing is blocked up with dead respectively in left end air inlet and right end gas outlet,
Each pipeline and connector are assembled, adds circumferential pressure and axial compressive force to 1~2MPa to coal ventricle using water as medium hand pump,
2 hours are lasted, whether each high pressure connection of observation device and pipeline have leakage, and pressure gauge reading should remain unchanged；
Step 2: high pressure gas seepage tests
The simulation coal heart is put into the coal chambers of the heart of coal ventricle, each pipeline and connector is assembled, is added with hand pump to coal ventricle
Circumferential pressure and axial compressive force open methane gas source, a certain amount of methane gas are injected into the coal chambers of the heart；
Methane gas source is closed, seepage flow displacement gas source is opened, continues to inject seepage flow displacement high pressure gas into the coal chambers of the heart, carry out
Seepage tests are recorded during the test under different vibration frequencies, ultrasonic wave, circumferential pressure, tangential pressure, temperature, air pressure
High pressure gas seepage flow situation；
Step 3: high pressure gas displacement experiment
The high pressure valve on gas exhaust piping is opened, continues to inject seepage flow displacement high pressure gas into the coal chambers of the heart, has mixed part
The methane gas of seepage flow displacing gases gas coming through flowmeter after desiccant dryness is read by gas flowmeter and is come out by displacement
The methane gas scale of construction, record different vibration frequencies, ultrasonic wave, circumferential pressure, tangential pressure, temperature and air pressure during the test
Under gas displacement situation；
Step 4: high-pressure gas jet is tested
High pressure valve before closing desiccant opens Pneumatic valve, gathers the high pressure gas of coal ventricle constantly in air accumulator,
Until the gas pressure of air accumulator is greater than the burst pressure of rupture disk component, high pressure gas is sprayed from release cylinder, fracturing coal sample；
After the test, seepage flow displacement gas source is closed, air accumulator is vented, slowly reduces circumferential pressure and axial compressive force, directly
Most zero；
Step 5: determination of resistivity is tested
The high pressure gas of coal ventricle disengaging connector is changed to the PEEK insulating joint of Instrument Measuring Resistivity of Carbon Products into, first plus circumferential pressure
And axial compressive force, then open seepage flow displacement gas source, after the simulation coal heart of coal ventricle it is immersed finish it is complete after, carry out the coal heart in high pressure and
Resistivity under gas flow measures and records；After the test, close seepage flow displacement gas source, slowly reduce circumferential pressure and
Axial compressive force, until being zero；
Step 6: large compressive strain measures
Foil gauge is sticked into the outer surface for simulating the coal heart, is put into strain measurement sealing container, seepage flow displacement gas source is opened
It is filled with high pressure gas to strain measurement sealing container, the strain value under different pressures is read by deformeter；After the test, it closes
Seepage flow displacement gas source is closed, strain measurement sealing container is vented.
Beneficial effects of the present invention:
(1) this experimental rig can truer simulation coal sample in different pressures, different temperatures and the underground underground Bo Deng
Gas flow, displacement situation under real conditions make test result have higher practical guided significance, safe and efficient to coal seam
Exploitation provides reliable guarantee.
(2) supersonic generator is added, high pressure gas seepage tests under the conditions of different sound waves, analog ultrasonic wave item can be carried out
Influence of the gas flow to coal sample micro-crack under part；Vibrator is added, using air as power source, wave item is differently descended in simulation
Influence of the gas flow to coal sample macroscopic view crack under part, the lateral wave and amplitude that vibrator generates are big, such as 10HZ or so, are used for
Underground wave is simulated to macroscopical crack of coal sample；By the position of Optimization for Ultrasonic Wave generator and vibrator, for simulating two
The coupling in a direction, makes test result closer descend real conditions.
(3) it can be used to carry out test and gas displacement effect that gas permeates after the coal heart fracturing coal sample that succeeds again
The determination of resistivity of fruit test, coal seam strain-gauge test and the coal heart under high pressure and gas infiltration；Gas after gas flow test
Body is constantly gathered in air accumulator, and when pressure is more than rupture disk pressure in rupture disk component, rupture disk fragmentation, gas is through discharging
Cylinder releases moment fracturing coal sample, while the high pressure gas of air accumulator collection seepage tests carries out stream test in time, effectively save
The energy.
(4) test platforms can complete kinds of experiments, and efficiently use gas source in test, avoid energy waste；Pass through
It is time-consuming to save test for reasonable disposition in test procedure.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention
Fig. 2 is connection schematic diagram of the invention.
Fig. 3 is the structural schematic diagram of coal ventricle.
Fig. 4 is the structural schematic diagram of rupture disk component.
Specific embodiment
By way of example and in conjunction with the accompanying drawings, the invention will be further described:
In conjunction with shown in Fig. 1-Fig. 3, a kind of coal seam strain, seepage flow, displacement and jet stream integrated experiment device, mainly by the coal heart
Room, stabilizer blade 13, pressure sensor 14, high pressure valve 15, blow valve 16, desiccant 17, gas flowmeter 18, vibrator 19, ultrasound
Wave producer 20, methane gas source 21, seepage flow displacement gas source 22, hand pump 23, Instrument Measuring Resistivity of Carbon Products 24, air accumulator 25, Pneumatic valve
26, rupture disk component 27, release cylinder 28, strain measurement sealing container 29 and deformeter 30 form.
Wherein, coal ventricle mainly by round steel cylinder 1, circumferential pressure transmitting set 2, T-type end socket 3, PEEK set 4, taper steel bushing 5,
Right piston set 6, right first pressing sleeve 7, right second pressing sleeve 8, left first pressing sleeve 9, left second pressing sleeve 10, circumferential cushion block 11, sealing ring
12 compositions.
Circumferential pressure transmitting set 2 is placed in round steel cylinder 1, and the outer diameter of circumferential pressure transmitting set 2 is less than the internal diameter of round steel cylinder 1.
Two 3 or so compartment of terrain of T-type end socket are opposite to be mounted in circumferential pressure transmitting set 2, and the stub end of two T-type end sockets 3 is opposite, often
The bar portion of a T-type end socket 3 is respectively set with a PEEK set 4.The left and right ends portion diameter of circumferential pressure transmitting set 2 becomes larger and passes through
Taper steel bushing 5 combines sealing ring 12 to push against sealing, forms cylinder between 2, two T-type end sockets 3 of set to transmit in circumferential pressure
The coal chambers of the heart A of shape forms circumferential pressure between circumferential pressure transmitting set 2 and round steel cylinder 1 and applies chamber B.Coal chambers of the heart A and circumferential pressure
It is seal cavity that power, which applies chamber B, and coal chambers of the heart A is used to place cylindrical coal sample, and circumferential pressure applies chamber B for applying to coal sample
Add circumferential pressure, circumferential pressure transmitting set 2 uses rubber material, can deform pressure.
After left first pressing sleeve 9 is screwed onto the left end of round steel cylinder 1 and is pushed against the taper steel bushing 5 in left side, left second pressing sleeve 10
Front end be screwed onto the first pressing sleeve 9 of a left side and be pushed against the PEEK set 4 in left side by circumferential cushion block 11 after.
After right first pressing sleeve 7 is screwed onto the right end of round steel cylinder 1 and is pushed against the taper steel bushing 5 on right side, right second pressing sleeve 8 is solid
It is located at the rear of right first pressing sleeve 7, right piston set 6 is pushed against the PEEK on right side after right second pressing sleeve 8, right first pressing sleeve 7
After set 4.Right second pressing sleeve 8 divides for large diameter section and small internal diameter section, and the middle part of right piston set 6 is provided with circumferential direction protrusion 6a and can be
It horizontally slips in the large diameter section of right second pressing sleeve 8, the interface of 8 size internal diameter section of right second pressing sleeve is as right piston set 6
Termination confined planes are moved to right, right piston set 6 moves to right until when being against the interface of size internal diameter section.
Setting is connected there are two circumferential direction high pressure liquid interface a and by pipeline with hand pump 23 on the side wall of round steel cylinder 1, and two
Circumferential high pressure liquid interface a one-in-and-one-out injects highly pressurised liquid for applying to circumferential pressure, and is passed by circumferential pressure in chamber B
It passs 2 pairs of coal samples of set and applies circumferential pressure, be also used for filling the water detection testing equipment before the test with the presence or absence of leakage.Right second pressing sleeve
Setting is connected there are two axial direction high pressure liquid interface b (one of them is not shown) and by pipeline with hand pump 23 on 8 side wall, and two
A axial direction high pressure liquid interface b one-in-and-one-out, the small internal diameter section for the second pressing sleeve 8 to the right injects highly pressurised liquid, and passes through right work
Plug sleeve 6 applies axial compressive force to coal sample.A seepage flow high pressure gas and Instrument Measuring Resistivity of Carbon Products are each provided on two T-type end sockets 3
PEEK insulating joint shared interface d, can be as the interface of Instrument Measuring Resistivity of Carbon Products PEEK insulating joint and as seepage flow height
It calms the anger the interface of body, first carries out Gas seepage test, remove the connection-peg of high pressure gas after the completion, load onto Instrument Measuring Resistivity of Carbon Products
PEEK insulating joint can carry out determination of resistivity.Instrument Measuring Resistivity of Carbon Products can be selected brand " Tonghui ", model TH2810D,
With 4 PEEK insulating joints, wherein 2 PEEK insulating joints are ability spare, that satisfaction measures in a high voltage state.
Circumferential pressure sensor mounting hole c is provided on the side wall of round steel cylinder 1；It is provided on the side wall of right second pressing sleeve 8
Axial compressive force sensor mounting hole d, axial compressive force sensor mounting hole d and axial direction high pressure liquid interface b are located at circumferential protrusion
The left and right sides of 6a.Mounting platform as supersonic generator 20, vibrator are scabbled in part in the middle part of the lateral wall of round steel cylinder 1
19 are connected to the left end entrance of coal ventricle.The lower section of round steel cylinder 1 is provided with stabilizer blade 13.
Methane gas source 21, seepage flow displacement gas source 22 are connected in parallel on the left side of coal ventricle by air inlet pipeline, and can be respectively coal
The coal chambers of the heart A of ventricle provides methane gas, seepage flow displacing gases (such as carbon dioxide gas), methane gas source 21, seepage flow displacement gas
Source 22 is each provided with a high pressure valve 15 and shares a pressure sensor 14.When needs provide first to the coal chambers of the heart A of coal ventricle
When alkane gas, the high pressure valve 15 on 21 pipeline of methane gas source is opened, closes the high pressure valve 15 on 22 pipeline of seepage flow displacement gas source.When
When needing to provide seepage flow displacing gases to the coal chambers of the heart A of coal ventricle, the high pressure valve 15 on 22 pipeline of seepage flow displacement gas source is opened, is closed
Close the high pressure valve 15 on 21 pipeline of methane gas source.
It is gentle that the right side of coal ventricle by gas exhaust piping is connected with pressure sensor 14, high pressure valve 15, desiccant 17 in turn
Flowmeter body 18.When needing to carry out gas displacement experiment, seepage flow displacement gas source 22 is opened, closes the high pressure valve on air accumulator 25
15, it prevents gas from entering air accumulator 25, can only be added through desiccant 17, gas flowmeter 18 by the methane gas that displacement comes out
Pressure sensor 14 and gas flowmeter 18, the gas Flooding Efficiency being capable of measuring under different pressures.Desiccant 17 is added, by dry
Drying prescription adsorbs the moisture in mixed gas, improves the accuracy of mixed gas accounting measurement.Seepage tests or displacement experiment terminate
Afterwards, the high pressure valve 15 on gas exhaust piping is closed, high pressure gas then gathers in air accumulator 25, in case subsequent stream test makes
With.
Vibrator 19 is mounted on the left end of coal ventricle and provides vibration for coal ventricle, and supersonic generator 20 is mounted on coal ventricle
Upper to provide ultrasonic wave for coal ventricle, hand pump 23 provides circumferential pressure and axial compressive force for coal ventricle, and Instrument Measuring Resistivity of Carbon Products 24 is used
In measuring resistivity of the coal sample of coal ventricle under high pressure and gas flow, air accumulator 25 is by piping connection in gas exhaust piping
Before pressure sensor 14, and air accumulator 25 is equipped with high pressure valve 15 and blow valve 16, the pressure sensor 14 and height of gas exhaust piping
Pneumatic valve 26, rupture disk component 27 and release cylinder 28 are connected in turn by pipeline between pressure valve 15.
The connected seepage flow high-pressure gas pipe of coal ventricle, high-pressure liquid tube are hose, and coal ventricle is placed in tepidarium, to provide
Suitable environment temperature.It discharges cylinder 28 to be inserted into coal sample, opens the high pressure valve 15 on air accumulator 25, carry out high-pressure gas jet cause
Split test, it is assumed that the burst pressure of rupture disk is 30MPA, and rupture disk is broken when the outlet pressure of air accumulator 25 is more than 30MPA
Bad, the pressure of 30MPA can moment fracturing coal sample test specimen.
As shown in figure 3, rupture disk component 27 installs female 27c by rupture disk 27a, rupture disk installation male connector 27b, rupture disk
It is formed with rupture disk gasket 27d.Male connector 27b, rupture disk are installed by rupture disk after rupture disk 27a, rupture disk gasket 27d overlapping
Installation female 27c is spirally connected compression wherein, is additionally provided between rupture disk installation male connector 27b, rupture disk installation female 27c close
Seal 12.
Seepage flow displacement gas source 22 can inject gas by pipeline into strain measurement sealing container 29, and strain measurement sealing is held
Device 29 is connected for holding the coal sample that foil gauge is posted in outer surface, and by foil gauge interface 29a with deformeter 30 to read coal
The strain parameter of sample, strain measurement sealing container 29 equipped with high pressure valve 15 and blow valve 16, strain measurement sealing container 29
Inner cavity and coal chambers of the heart A are cylinder, and diameter is identical.
Four kinds of methane, nitrogen, carbon dioxide or hydrogen sulfide gases can be used in seepage tests；Stream test is using dioxy
Change carbon gas.
Using above-mentioned coal seam strain, seepage flow, displacement and jet stream integrated experiment device, coal seam strain, seepage flow, displacement are carried out
And jet stream comprehensive testing method, its step are as follows:
Step 1: equipment leak test
The simulation coal heart is put into the coal chambers of the heart A of coal ventricle, sealing is blocked up with dead respectively in left end air inlet and right end gas outlet,
Each pipeline and connector are assembled, adds circumferential pressure and axial compressive force to 1~2MPa to coal ventricle using water as medium hand pump,
2 hours are lasted, whether each high pressure connection of observation device and pipeline have leakage, and pressure gauge reading should remain unchanged.
Step 2: high pressure gas seepage tests
The simulation coal heart is put into the coal chambers of the heart A of coal ventricle, each pipeline and connector is assembled, is added with hand pump to coal ventricle
Circumferential pressure and axial compressive force, such as 60Mpa open methane gas source 21, inject a certain amount of methane gas into coal chambers of the heart A.
Methane gas source 21 is closed, seepage flow displacement gas source 22 is opened, continues to inject seepage flow displacement high pressure gas into coal chambers of the heart A
Body, such as 60Mpa carry out seepage tests, record different vibration frequencies, ultrasonic wave, circumferential pressure, tangential pressure during the test
High pressure gas seepage flow situation under power, temperature, air pressure.
Step 3: high pressure gas displacement experiment
The high pressure valve 15 on gas exhaust piping is opened, continues to inject seepage flow displacement high pressure gas into coal chambers of the heart A, has mixed portion
Divide the methane gas of seepage flow displacing gases gas coming through flowmeter 18 after desiccant 17 is dry, quilt is read by gas flowmeter 18
The methane gas scale of construction that displacement comes out, records different vibration frequencies, ultrasonic wave, circumferential pressure, tangential pressure, temperature during the test
Spend the gas displacement situation of gentle pressure.
Step 4: high-pressure gas jet is tested
High pressure valve 15 before closing desiccant 17 opens Pneumatic valve 26, the high pressure gas of coal ventricle is made constantly to gather storage
In gas tank 25, until air accumulator 25 gas pressure be greater than rupture disk component 27 burst pressure, high pressure gas from release cylinder 28
It sprays, fracturing coal sample.
After the test, seepage flow displacement gas source 22 is closed, air accumulator 25 is vented, slowly reduces circumferential pressure and axial pressure
Power, until being zero.
Step 5: determination of resistivity is tested
The high pressure gas of coal ventricle disengaging connector is changed to the PEEK insulating joint of Instrument Measuring Resistivity of Carbon Products into, first plus circumferential pressure
And axial compressive force, then seepage flow displacement gas source 22 is opened, after the simulation coal heart of coal ventricle is immersed and finishes entirely, the coal heart is carried out in high pressure
And resistivity under gas flow measures and records；After the test, seepage flow displacement gas source 22 is closed, circumferential pressure is slowly reduced
Power and axial compressive force, until being zero.
Step 6: large compressive strain measures
Foil gauge is sticked into the outer surface for simulating the coal heart, is put into strain measurement sealing container 29, seepage flow displacement gas is opened
Source 22 is filled with high pressure gas to strain measurement sealing container 29, reads the strain value under different pressures by deformeter 30；Test
After, seepage flow displacement gas source 22 is closed, strain measurement sealing container 29 is vented.
Claims (6)
1. a kind of coal seam strain, seepage flow, displacement and jet stream integrated experiment device, it is characterised in that: including coal ventricle, vibrator
(19), supersonic generator (20), methane gas source (21), seepage flow displacement gas source (22), hand pump (23), Instrument Measuring Resistivity of Carbon Products
(24), air accumulator (25), Pneumatic valve (26), rupture disk component (27), release cylinder (28) and strain measurement sealing container (29), institute
State methane gas source (21), seepage flow displacement gas source (22) is connected in parallel on the left side of coal ventricle by air inlet pipeline, and can be respectively the coal heart
The coal chambers of the heart (A) of room provides methane gas, seepage flow displacing gases, and methane gas source (21), seepage flow displacement gas source (22) are each provided with
One high pressure valve (15) simultaneously shares a pressure sensor (14), and the right side of coal ventricle is connected with pressure in turn by gas exhaust piping
Sensor (14), high pressure valve (15), desiccant (17) and gas flowmeter (18)；The vibrator (19) is mounted on coal ventricle
Left end provides vibration for coal ventricle, and supersonic generator (20), which is mounted on coal ventricle, provides ultrasonic wave, the hand for coal ventricle
It shakes pump (23) and provides circumferential pressure and axial compressive force for coal ventricle, the Instrument Measuring Resistivity of Carbon Products (24) is used to measure the coal of coal ventricle
Resistivity of the sample under high pressure and gas flow, the air accumulator (25) pass through piping connection in the pressure sensor of gas exhaust piping
(14) before, and air accumulator (25) is equipped with high pressure valve (15) and blow valve (16), the pressure sensor (14) and height of gas exhaust piping
The Pneumatic valve (26), rupture disk component (27) and release cylinder (28) are connected in turn by pipeline between pressure valve (15)；It is described
Seepage flow displacement gas source (22) can inject gas by pipeline into strain measurement sealing container (29), and the strain measurement sealing is held
Device (29) for holding the coal sample that foil gauge is posted in outer surface, and by foil gauge interface (29a) be connected with deformeter (30) with
The strain parameter of coal sample is read, the strain measurement sealing container (29) is described equipped with high pressure valve (15) and blow valve (16)
The inner cavity of strain measurement sealing container (29) and the coal chambers of the heart (A) are cylinder, and diameter is identical.
2. coal seam strain, seepage flow, displacement and jet stream integrated experiment device described in accordance with the claim 1, it is characterised in that: described
Coal ventricle includes round steel cylinder (1), circumferential pressure transmitting set (2), T-type end socket (3), PEEK set (4), taper steel bushing (5), right piston
(6), right first pressing sleeve (7), right second pressing sleeve (8), left first pressing sleeve (9), left second pressing sleeve (10) are covered, the circumferential pressure passes
It passs set (2) to be placed in round steel cylinder (1), the outer diameter of circumferential pressure transmitting set (2) is less than the internal diameter of round steel cylinder (1), two T-types
End socket (3) left and right compartment of terrain is opposite to be mounted in circumferential pressure transmitting set (2), and the bar portion of each T-type end socket (3) is respectively set with one
A PEEK set (4), the left and right ends portion diameter of circumferential pressure transmitting set (2) become larger and pass through taper steel bushing (5) in conjunction with close
Seal (12) pushes against sealing, and the cylindrical coal chambers of the heart is formed between set (2), two T-type end sockets (3) to transmit in circumferential pressure
(A), it is transmitted in circumferential pressure and forms circumferential pressure application chamber (B) between set (2) and round steel cylinder (1)；Left first pressing sleeve (9)
After being screwed onto the left end of round steel cylinder (1) and being pushed against the taper steel bushing (5) in left side, the front end of left second pressing sleeve (10) is spirally connected
After being pushed against the PEEK set (4) in left side in left first pressing sleeve (9) and through circumferential cushion block (11)；Right first pressing sleeve (7)
After being screwed onto the right end of round steel cylinder (1) and being pushed against the taper steel bushing (5) on right side, right second pressing sleeve (8) is installed in the right side first and presses
The rear of (7) is covered, right piston set (6) is pushed against the PEEK set (4) on right side after right second pressing sleeve (8), right first pressing sleeve (7)
Afterwards, it is provided with circumferential raised (6a) in the middle part of right piston set (6) and can be slided left and right in the large diameter section of right second pressing sleeve (8)
Dynamic, the interface of right second pressing sleeve (8) size internal diameter section moves to right termination confined planes as right piston set (6)；
Setting there are two circumferential high pressure liquid interface (a) and passes through pipeline and hand pump (23) phase on the side wall of the round steel cylinder (1)
Even, setting there are two axial high pressure liquid interface (b) and passes through pipeline and hand pump (23) phase on the side wall of right second pressing sleeve (8)
Even, a seepage flow high pressure gas and Instrument Measuring Resistivity of Carbon Products PEEK insulating joint shared interface are each provided on two T-type end sockets (3)
(d)。
3. coal seam strain, seepage flow, displacement and jet stream integrated experiment device according to claim 2, it is characterised in that: described
It is provided with circumferential pressure sensor mounting hole (c) on the side wall of round steel cylinder (1), is provided with axis on the side wall of right second pressing sleeve (8)
To pressure sensor mounting hole (d), and axial compressive force sensor mounting hole (d) and axial high pressure liquid interface (b) are located at ring
To the left and right sides of raised (6a)；Part is scabbled as supersonic generator (20) in the middle part of the lateral wall of the round steel cylinder (1)
Mounting platform, the vibrator (19) is connected to the left end entrance of coal ventricle.
4. existing according to the strain of coal seam described in claims 1 or 2 or 3, seepage flow, displacement and jet stream integrated experiment device, feature
In: seepage flow high-pressure gas pipe, the high-pressure liquid tube being connected with the coal ventricle are hose, and coal ventricle is placed in tepidarium.
5. coal seam strain, seepage flow, displacement and jet stream integrated experiment device according to claim 4, it is characterised in that: described
Rupture disk component (27) includes rupture disk (27a), rupture disk installation male connector (27b), rupture disk installation female (27c) and rupture disk
Gasket (27d), the rupture disk (27a), rupture disk gasket (27d) pass through rupture disk after overlapping and install male connector (27b), rupture disk
Installation female (27c) is spirally connected compression wherein, installs in rupture disk and also sets between male connector (27b), rupture disk installation female (27c)
It is equipped with sealing ring (12).
6. a kind of coal seam strain, seepage flow, displacement and jet stream comprehensive testing method, it is characterised in that: including in claim 1-5
Described in any item coal seam strains, seepage flow, displacement and jet stream integrated experiment device, its step are as follows:
Step 1: equipment leak test
The simulation coal heart is put into the coal chambers of the heart (A) of coal ventricle, left end air inlet and right end gas outlet are respectively with dead stifled sealing, dress
Each pipeline and connector are prepared, adds circumferential pressure and axial compressive force to 1~2MPa to coal ventricle using water as medium hand pump, goes through
When 2 hours, whether each high pressure connection of observation device and pipeline have leakage, and pressure gauge reading should remain unchanged；
Step 2: high pressure gas seepage tests
The simulation coal heart is put into the coal chambers of the heart (A) of coal ventricle, each pipeline and connector is assembled, adds ring to coal ventricle with hand pump
It to pressure and axial compressive force, opens methane gas source (21), a certain amount of methane gas of injection into the coal chambers of the heart (A)；
It closes methane gas source (21), opens seepage flow displacement gas source (22), continue to inject seepage flow displacement high pressure gas into the coal chambers of the heart (A)
Body carries out seepage tests, records different vibration frequencies, ultrasonic wave, circumferential pressure, tangential pressure, temperature, gas during the test
The high pressure gas seepage flow situation of pressure；
Step 3: high pressure gas displacement experiment
The high pressure valve (15) on gas exhaust piping is opened, continues to inject seepage flow displacement high pressure gas into the coal chambers of the heart (A), has mixed portion
Divide the methane gas of seepage flow displacing gases gas coming through flowmeter (18) after desiccant (17) are dry, by gas flowmeter (18)
The methane gas scale of construction come out by displacement is read, records different vibration frequencies, ultrasonic wave, circumferential pressure, tangential during the test
The gas displacement situation of the gentle pressure of pressure, temperature；
Step 4: high-pressure gas jet is tested
High pressure valve (15) before closing desiccant (17) is opened Pneumatic valve (26), gathers the high pressure gas of coal ventricle constantly
In air accumulator (25), until air accumulator (25) gas pressure be greater than rupture disk component (27) burst pressure, high pressure gas from
It discharges cylinder (28) to spray, fracturing coal sample；
After the test, seepage flow displacement gas source (22) are closed, be vented air accumulator (25), slowly reduce circumferential pressure and axial pressure
Power, until being zero；
Step 5: determination of resistivity is tested
The high pressure gas of coal ventricle disengaging connector is changed to the PEEK insulating joint of Instrument Measuring Resistivity of Carbon Products into, first plus circumferential pressure and axis
To pressure, then open seepage flow displacement gas source (22), after the simulation coal heart of coal ventricle it is immersed finish it is complete after, carry out the coal heart in high pressure and
Resistivity under gas flow measures and records；After the test, seepage flow displacement gas source (22) are closed, slowly reduces circumferential pressure
Power and axial compressive force, until being zero；
Step 6: large compressive strain measures
Foil gauge is sticked into the outer surface for simulating the coal heart, is put into strain measurement sealing container (29), seepage flow displacement gas source is opened
(22) it is filled with high pressure gas to strain measurement sealing container (29), reads the strain value under different pressures by deformeter (30)；
After the test, seepage flow displacement gas source (22) are closed, be vented strain measurement sealing container (29).
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