CN105863596A - Ultrasonic wave and hydrofracture compound coal-body fracturing simulation device and method for underground coal mine - Google Patents
Ultrasonic wave and hydrofracture compound coal-body fracturing simulation device and method for underground coal mine Download PDFInfo
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- CN105863596A CN105863596A CN201610294713.2A CN201610294713A CN105863596A CN 105863596 A CN105863596 A CN 105863596A CN 201610294713 A CN201610294713 A CN 201610294713A CN 105863596 A CN105863596 A CN 105863596A
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- 239000003245 coal Substances 0.000 title claims abstract description 101
- 150000001875 compounds Chemical class 0.000 title claims abstract description 14
- 238000004088 simulation Methods 0.000 title abstract description 12
- 238000000034 method Methods 0.000 title abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000012544 monitoring process Methods 0.000 claims abstract description 4
- 238000002604 ultrasonography Methods 0.000 claims description 44
- 239000000523 sample Substances 0.000 claims description 40
- 238000002347 injection Methods 0.000 claims description 21
- 239000007924 injection Substances 0.000 claims description 21
- 238000002474 experimental method Methods 0.000 claims description 18
- 238000012806 monitoring device Methods 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 18
- 239000000853 adhesive Substances 0.000 claims description 6
- 230000001070 adhesive effect Effects 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 6
- 230000000740 bleeding effect Effects 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
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- 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
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- Fluid Mechanics (AREA)
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- Geophysics And Detection Of Objects (AREA)
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Abstract
The invention discloses an ultrasonic wave and hydrofracture compound coal-body fracturing simulation device and method for an underground coal mine. The ultrasonic wave and hydrofracture compound coal-body fracturing simulation device comprises a closed tri-axial pressurizing device, an ultrasonic wave and hydrofracture compound fracturing device, a gas extracting and injecting device and a monitoring and controlling device. The ultrasonic wave and hydrofracture compound fracturing device comprises an ultrasonic wave fracturing device and a hydro-fracturing device, and the gas extracting and injecting device comprises a vacuum air pump and a gas injecting cylinder with a pressure gauge. A coal sample is put in the tri-axial pressurizing device, and the ultrasonic wave and hydrofracture compound fracturing device enables the ultrasonic wave fracturing device and the hydro-fracturing device to be respectively connected with the coal sample in the closed tri-axial pressurizing device through an h-shaped steel pipe. The vacuum air pump in the gas extracting and injecting device and the gas injecting cylinder with the pressure gauge are respectively connected with the coal sample in the closed tri-axial pressurizing device. The monitoring and controlling device is connected with the coal sample in the closed tri-axial pressurizing device. The ultrasonic wave and hydrofracture compound coal-body fracturing simulation device can really and accurately simulate the ultrasonic wave and hydrofracture compound coal-body fracturing process of the underground coal mine.
Description
Technical field
The present invention relates to a kind of ultrasound wave and fracturing and be combined the experimental simulation device of fracturing coal body, particularly a kind of colliery
Downhole ultrasonic and fracturing are combined fracturing coal body analog and method.
Background technology
Gas is China's coal-mine Frequent Accidents and serious main cause, along with Coal Exploitation is deep and the increase of well yield,
Gas emission is increasing, Gas Outburst and gas explosion more and more become restriction safety of coal mines efficiently produce most important
A difficult problem.At present, gas pumping is to solve one of maximally efficient measure of Gas Disaster.China's complex geologic conditions, coal seam
Gas pressure is high and mostly is low air permeability coal seam, along with adopting deep increase, the most conventional fracturing, hydraulic slotted liner technique and
The coverage of the measures such as presplit blasting can be restricted, and after using monotechnics measure, coal body cannot be formed and split on a large scale
Gap net, gas pumping efficiency is low, and extracting result is the most inconspicuous.
Ultrasonic technology, as a kind of pollution-free, efficiency is high, penetration capacity is strong emerging technology, is widely used in life
With industry every field.Research shows, ultrasound wave has reduction coal rock strength, excitation coal body fracturing and promotes gas solution
The effect of analysis, fracturing, as tradition coal body fracturing means, has technological process simple, technically reliable, coverage
The advantage such as wide, after fracturing, coal seam moisture content raises simultaneously, is conducive to expanding ultrasonic propagation radius, and ultrasound wave has
Being beneficial to the water-blocking effect after alleviating fracturing, ultrasound wave and fracturing are combined fracturing coal body as emerging coal seam fracturing
Technology, has ultrasound wave and the two-fold advantage in fracturing coal seam.
The research that laboratory is combined fracturing coal body to ultrasound wave and fracturing at present is less, and set of experimental provision is the completeest
Kind.That there is a lot of desirability in theory analysis and numerical simulation it is assumed that the biggest with down-hole coal bed actual occurrence status difference；
Directly going underground coal mine to test not only cost huge, dangerous high, each coal mine gas pressure, ature of coal, stress state are also
Being single, occasionality probability is the biggest.Therefore, it is combined fracturing coal body to more deeply probe into ultrasound wave and fracturing
Mechanism and influence factor, a kind of underground coal mine ultrasound wave of design is combined fracturing coal body analog with fracturing, and opens
Open up corresponding simulation experiment to be just particularly important.
Summary of the invention
Goal of the invention: in order to overcome technical deficiency present in prior art, the present invention provides a kind of underground coal mine ultrasound wave
Being combined fracturing coal body analog and method with fracturing, true simulation underground coal mine ultrasound wave is compound with fracturing to be caused
Split coal body process.
Technical scheme: for achieving the above object, technical scheme is as follows:
Underground coal mine ultrasound wave and fracturing are combined fracturing coal body analog, including closing three axle pressue devices, ultrasonic
Ripple fracturing is combined fracturing device, bleed gas injection device and monitoring device；Described ultrasound wave fracturing is compound to be caused
Split device and include ultrasound wave fracturing equipment and fracturing equipment, described in gas injection device of bleeding include vacuum air pump and with pressure
The gas gas injection bottle of power table；Being placed with coal sample in described three axle pressue devices, described ultrasound wave fracturing is combined fracturing dress
Put and by H-shaped steel pipe, ultrasound wave fracturing equipment and fracturing equipment are connected with the coal sample closed in three axle pressue devices respectively
Connect；The described vacuum air pump bled in gas injection device and carry manometric gas gas injection bottle respectively with close three axles and add and press-fit
Put interior coal sample to connect；Described monitoring device is connected with the coal sample closed in three axle pressue devices.
Further technical scheme, described closing three axle pressue device includes seal groove and seals lid, and described seal groove is adopted
Form with the Plate Welding that thickness of slab is 17cm；Described seal groove and sealing lid connect and compose inner space by eight bolts
Square for length of side 45cm；The side of described seal groove is drilled with three through holes, is respectively upper hole, mesopore and lower opening；
Three through hole centers distance seal groove distances from bottom the most respectively are respectively 6cm, 16cm and 26cm, aperture from lower to
Upper respectively 1cm, 3cm and 1cm, three through holes are respectively intended to be attached across monitoring device, ultrasound wave fracturing
Compound fracturing device and gas injection device of bleeding.
Further technical scheme, two orthogonal sides of described seal groove are respectively equipped with a distance rod through hole,
Described sealing is covered with a distance rod through hole, is respectively arranged with distance rod, is positioned at sealing in three described distance rod through holes
The one end of three distance rods that groove is internal corresponding is vertically connected with thrust plate, described thrust plate is long 30cm, wide 30cm,
The cuboid bloom of thick 3cm, described thrust plate and coal sample are close to squeezing action；Described distance rod respectively with seal groove and close
Being sealed by rubber ring between capping, described rubber ring is embedded in seal groove and seals in the groove that Gai Gangbi mills out in advance.
Underground coal mine ultrasound wave and fracturing are combined the experimental technique of fracturing coal body analog, comprise the following steps:
S1: according to the difference measuring equipment needed for experiment, in the one side cutting of the square coal sample that the length of side is 30cm,
Cutting complete after with center, cutting face as the center of circle, bore an a diameter of 3cm, the degree of depth is the boring of 15cm；
S2: probe and the embedding wire of the monitoring device needed for experiment are located in the groove carved in advance, by a length of
15cm, external diameter is that H-shaped steel pipe one end of 3cm is inserted in boring, and insertion depth is 5cm, between H-shaped steel pipe and rib
Seal with anchoring adhesive, wired ultrasonic transducer will be connected and send in boring, in ultrasonic transducer and H-shaped steel pipe
Connected by hollow out steel loop between wall, keep there is gap between ultrasonic transducer and H-shaped steel pipe；
S3: the coal sample connecting monitoring device be placed in seal groove, H-shaped steel pipe is directed at the mesopore of seal groove to be inserted
Entering, till coal sample wall is fitted with seal groove internal face, experiment measures the electric wire of required monitoring device by close
Upper hole on sealing groove passes, and is sealed by anchoring adhesive between electric wire and hole wall；
S4: use bolt to be linked together with seal groove by sealing lid, push 3 distance rods to coal sample, by close after completing
Joint sealing is placed on triaxial pressure machine, and 3 distance rods are corresponding with the 3 of triaxial pressure machine press rods, it is achieved coal sample three axle
Pressurization；
S5: use vacuum pump by lower opening to evacuation in seal box 12 hours, experimental different uses band pressure
The gas gas injection bottle of table is filled with the gas of different volumes by lower opening in seal box, fills pass gas check valve after gas completes, adjusts
Joint triaxial pressure machine makes coal sample reach to test required triaxial stress；
S6: use ultrasound wave fracturing equipment and fracturing equipment that coal sample is entered according to the suitable mode of different choice of experiment
The compound fracturing of row, and by monitoring device Real-time Collection experimental data.
Beneficial effect: the present invention is to be combined a kind of underground coal mine of fracturing coal body technology based on ultrasound wave and fracturing to surpass
Sound wave and fracturing are combined fracturing coal body analog and method, wherein: ultrasound wave and fracturing are combined fracturing coal body
As a kind of novel coal seam fracturing technology, have that speed of application is fast, energy density is big, coverage is wide, adapt to hard coal
The advantages such as layer operation, are to solve one of maximally efficient measure of China's hard low-air-permeability coal-bed gas extraction problem at present.
The present invention devises ultrasound wave and the waterpower of a set of perfect simulation true occurrence status of underground coal mine Gas-bearing Coal Seams first
Pressure break is combined fracturing coal body analogue experiment installation and using method.
The present invention uses the experimental technique of analog simulation truly to simulate down-hole coal bed ambient stress and gas bearing situation, with
Theory analysis is compared with numerical simulation, closer to down-hole coal bed time of day, the reliability of experimental data, science and
Accuracy is higher；Compared with field measurement, being affected less by external force, cost is relatively low, and experiment can be by regulating three axial compressions simultaneously
Power and gas pressure simulation different coal, adaptability is more extensive.Use the mode inlaying rubber ring in sealing channel-section steel wall groove milling close
Space between envelope distance rod and steel wall, voltage endurance capability is higher, and sealing effectiveness is more preferable；H-shaped steel pipe is used to connect water respectively
Power fracturing unit and ultrasound wave fracturing equipment, saved material and construction while ensureing two fracturing systems normal operations
Time.
Accompanying drawing explanation
Fig. 1 is that underground coal mine ultrasound wave is combined fracturing coal body analog schematic diagram with fracturing；
Fig. 2 is the front view of seal groove in Fig. 1；
Fig. 3 is the top view of seal groove in Fig. 1；
Fig. 4 is the top view sealing lid in Fig. 1；
Fig. 5 is the front view sealing lid in Fig. 1；
Fig. 6 is each instrument layout and connection diagram in main borehole in Fig. 1.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is further described.
Such as Fig. 1, underground coal mine ultrasound wave and fracturing are combined fracturing coal body analog, add press-fit including closing three axles
Put, ultrasound wave fracturing is combined fracturing device 4, bleed gas injection device 5 and monitoring device 3；Described ultrasound wave
Fracturing is combined fracturing device 4 and includes ultrasound wave fracturing equipment 4-1 and fracturing equipment 4-2, described in bleed gas injection
Device 5 includes vacuum air pump 5-2 and carries manometric gas gas injection bottle 5-1；It is placed with in described three axle pressue devices
Coal sample 10, described ultrasound wave fracturing is combined fracturing device 4 by H-shaped steel pipe 18 by ultrasound wave fracturing equipment 4-1
Being connected with the coal sample 10 closed in three axle pressue devices respectively with fracturing equipment 4-2, described H-shaped steel pipe 18 of crossing leads to
Cross rubber ring 8-1 and seal with closing three axle pressue devices；The described vacuum air pump 5-2 bled in gas injection device 5 and band
Manometric gas gas injection bottle 5-1 is connected with the coal sample 10 closed in three axle pressue devices respectively；Described monitoring fills
Put 3 to be connected with the coal sample 10 closed in three axle pressue devices.
Such as Fig. 2-5, described closing three axle pressue device includes seal groove 1 and seals lid 2, and described seal groove 1 uses
Thickness of slab is that the Plate Welding of 17cm forms；Described seal groove 1 and sealing lid 2 connect and compose inside by eight bolts 16
Space is the square of length of side 45cm；The side of described seal groove 1 is drilled with three through holes, is respectively upper hole 9-1, mesopore
9-2 and lower opening 9-3；Three through hole center distance seal groove 1 distances from bottom the most respectively are respectively 6cm, 16cm
And 26cm, aperture is respectively 1cm, 3cm and 1cm from top to bottom, and three through holes are respectively intended to be attached across monitoring
Device 3, ultrasound wave fracturing are combined fracturing device 4 and gas injection device 5 of bleeding.Two of described seal groove 1 are mutual
Vertical side is respectively equipped with a distance rod through hole, and described sealing lid 2 is provided with a distance rod through hole, pushes away described in three
Being respectively arranged with distance rod 6 in power rod through-hole, the one end being positioned at internal three the corresponding distance rods 6 of seal groove 1 vertically connects
Being connected to thrust plate 11, described thrust plate 11 is long 30cm, wide 30cm, the cuboid bloom of thick 3cm, described thrust
Plate 11 and coal sample 10 are close to squeezing action；Described distance rod 11 respectively and passes through rubber between seal groove 1 and sealing lid 2
Glue ring 8-1 seals, and described rubber ring 8-1 is embedded in seal groove 1 and seals in the groove that lid 2 steel walls mill out in advance.
As Fig. 1 and 6, underground coal mine ultrasound wave and fracturing are combined the experimental technique of fracturing coal body analog, including
Following steps:
S1: according to the difference measuring equipment needed for experiment, in the one side cutting of the square coal sample 10 that the length of side is 30cm,
Cutting complete after with center, cutting face as the center of circle, bore an a diameter of 3cm, the degree of depth is the boring 21 of 15cm；
S2: probe and the embedding wire of the monitoring device 3 needed for experiment are located in the groove carved in advance, by a length of
15cm, external diameter is that H-shaped steel pipe 18 one end of 3cm is inserted in boring 21, and insertion depth is 5cm, H-shaped steel pipe 18
And seal with anchoring adhesive 17 between rib, wired ultrasonic transducer 20 will be connected and send in boring 21, ultrasonic
It is connected by hollow out steel loop 19 between wave transducer 20 with H-shaped steel pipe 18 inwall, keeps ultrasonic transducer 20 and h
Mutual gap between shape steel pipe 18；
S3: the coal sample 10 connecting monitoring device 3 is placed in seal groove 1, H-shaped steel pipe 18 and seal groove 1
Mesopore 9-2 alignment insert, till coal sample 10 wall and seal groove 1 internal face are fitted, required prison is measured in experiment
The electric wire surveying supervising device 3 is passed by the upper hole 9-1 on seal groove, is sealed by anchoring adhesive between electric wire and hole wall；
S4: use bolt 16 to be linked together with seal groove 1 by sealing lid 2, push 3 distance rods 6 to coal sample 10,
Being placed in by seal box on triaxial pressure machine after completing, 3 distance rods 6 are corresponding with the 3 of triaxial pressure machine press rods,
Realize the pressurization of coal sample three axle；
S5: use vacuum pump 5-2 by lower opening 9-3 to evacuation in seal box 12 hours, experimental different uses
In seal box, it is filled with the gas of different volumes with manometric gas gas injection bottle 5-1 by lower opening 9-3, fills gas and complete
Rear pass gas check valve 12, regulation triaxial pressure machine makes coal sample reach to test required triaxial stress；
S6: use ultrasound wave fracturing equipment and fracturing equipment 4 to coal sample according to the suitable mode of different choice of experiment
Carry out compound fracturing, and by monitoring device 3 Real-time Collection experimental data.
The above is only the preferred embodiment of the present invention, it should be pointed out that: for those skilled in the art
For, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications are also
Should be regarded as protection scope of the present invention.
Claims (4)
1. underground coal mine ultrasound wave and fracturing are combined fracturing coal body analog, it is characterised in that: include closing three
Axle pressue device, ultrasound wave fracturing are combined fracturing device (4), gas injection device of bleeding (5) and monitoring device
(3)；Described ultrasound wave fracturing is combined fracturing device (4) and includes ultrasound wave fracturing equipment (4-1) and fracturing
Equipment (4-2), described in bleed gas injection device (5) include vacuum air pump (5-2) and carry manometric gas gas injection bottle
(5-1)；Being placed with coal sample (10) in described three axle pressue devices, described ultrasound wave fracturing is combined fracturing device (4)
By H-shaped steel pipe (18) by ultrasound wave fracturing equipment (4-1) and fracturing equipment (4-2) respectively with close three axles
Coal sample (10) in pressue device connects；Vacuum air pump (5-2) in described gas injection device of bleeding (5) and with pressure
Gas gas injection bottle (5-1) of power table is connected with the coal sample (10) closed in three axle pressue devices respectively；Described monitoring prison
Control device (3) is connected with the coal sample (10) closed in three axle pressue devices.
The most according to claim 1, underground coal mine ultrasound wave and fracturing are combined fracturing coal body analog, and it is special
Levy and be: described closing three axle pressue device includes seal groove (1) and seals lid (2), and described seal groove (1) is adopted
Form with the Plate Welding that thickness is 17cm；Described seal groove (1) and sealing lid (2) are by eight bolts (16)
Connect and compose the square that inner space is length of side 45cm；The side of described seal groove (1) is drilled with three through holes, respectively
For upper hole (9-1), mesopore (9-2) and lower opening (9-3)；Three through hole centers from top to bottom with seal groove (1) bottom
Distance be respectively 6cm, 16cm and 26cm, aperture is respectively 1cm, 3cm and 1cm from top to bottom, three through holes from
Be respectively intended to down be attached across monitoring device (3), ultrasound wave fracturing is combined fracturing device (4) and takes out
Gas gas injection device (5).
The most according to claim 2, underground coal mine ultrasound wave and fracturing are combined fracturing coal body analog, and it is special
Levy and be: two orthogonal sides of described seal groove (1) are respectively equipped with a distance rod through hole, described sealing
Lid (2) is provided with a distance rod through hole, is respectively arranged with distance rod (6), seal groove in three described distance rod through holes
(1) one end of internal three corresponding distance rods (6) vertically connects thrust plate (11), and described thrust plate (11) is
Long 30cm, wide 30cm, the cuboid bloom of thick 3cm, described thrust plate (11) and coal sample (10) are close to extruding and are made
With；Sealed by rubber ring (8-1) between described distance rod (11) and seal groove (1) and sealing lid (2), institute
State rubber ring (8-1) be embedded in seal groove (1) and seal in the groove that lid (2) steel wall mills out in advance.
4. underground coal mine ultrasound wave and fracturing are combined the experimental technique of fracturing coal body analog, it is characterised in that
Comprise the following steps:
S1: according to the difference measuring equipment needed for experiment, in the one side of square coal sample (10) that the length of side is 30cm
Cutting, cutting complete after with center, cutting face as the center of circle, construct an a diameter of 3cm, and the degree of depth is the boring (21) of 15cm；
S2: probe and the embedding wire of the monitoring device (3) needed for experiment are located in the groove carved in advance, will be long
Degree is 15cm, and external diameter is that the H-shaped steel pipe (18) of 3cm inserts in boring (21), and insertion depth is 5cm, H-shaped
Seal with anchoring adhesive (17) between steel pipe (18) and rib, wired ultrasonic transducer (20) will be connected and send into
In boring (21), between ultrasonic transducer (20) and H-shaped steel pipe (18) inwall by hollow out steel loop (19) even
Connect, keep there is gap between ultrasonic transducer (20) and H-shaped steel pipe (18)；
S3: the coal sample (10) connecting monitoring device (3) is placed in seal groove (1), H-shaped steel pipe (18)
It is directed at insertion, until coal sample (10) wall pastes with seal groove (1) internal face with the mesopore (9-2) of seal groove (1)
Only being combined into, experiment is measured the electric wire of required monitoring device (3) and is passed by the upper hole (9-1) on seal groove, electricity
Sealed by anchoring adhesive between line and hole wall；
S4: use bolt (16) to link together, sealing lid (2) by 3 distance rods (6) with seal groove (1)
Push coal sample (10) to, seal box is placed on triaxial pressure machine after completing, 3 distance rods (6) and triaxial pressure machine
3 press rods correspondences, it is achieved coal sample three axle pressurize；
S5: use vacuum pump (5-2) by lower opening (9-3) to evacuation in seal box 12 hours, experimental not
With using the gas being filled with different volumes with manometric gas gas injection bottle (5-1) by lower opening (9-3) in seal box,
Filling and close gas check valve (12) after gas completes, regulation triaxial pressure machine makes coal sample reach to test required triaxial stress；
S6: according to the difference of experiment, select suitable mode to use ultrasound wave fracturing equipment and fracturing equipment (4)
Coal sample is carried out compound fracturing, and by monitoring device (3) Real-time Collection experimental data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610294713.2A CN105863596B (en) | 2016-05-05 | 2016-05-05 | Underground coal mine ultrasonic wave and the compound fracturing coal body analogue experiment method of hydraulic fracturing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610294713.2A CN105863596B (en) | 2016-05-05 | 2016-05-05 | Underground coal mine ultrasonic wave and the compound fracturing coal body analogue experiment method of hydraulic fracturing |
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| CN105863596A true CN105863596A (en) | 2016-08-17 |
| CN105863596B CN105863596B (en) | 2018-05-25 |
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| CN107246255A (en) * | 2017-07-26 | 2017-10-13 | 太原理工大学 | Supercritical CO2The analogue means and method of fracturing coal body are combined with hydraulic fracturing |
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| CN110630229A (en) * | 2019-09-30 | 2019-12-31 | 中国地质大学（武汉） | Device and method for evaluating hydrate exploitation output based on ultrasonic waves and sand prevention screen |
| CN110761778A (en) * | 2018-07-25 | 2020-02-07 | 中国石油化工股份有限公司 | Fracturing fracture monitoring method and system based on sound waves |
| CN111287721A (en) * | 2020-03-04 | 2020-06-16 | 中联煤层气有限责任公司 | Fracturing method combining high-pressure aerodynamic force induced fracture initiation and hydraulic fracturing |
| CN111859712A (en) * | 2020-08-03 | 2020-10-30 | 重庆大学 | Ground advanced pre-control method for coal mine rock burst |
| CN112253220A (en) * | 2020-09-24 | 2021-01-22 | 中国矿业大学 | Self-pressurization coal body fracturing permeability-increasing enhanced gas extraction method based on ultrasonic waves |
| CN112576215A (en) * | 2020-12-09 | 2021-03-30 | 河海大学 | Ultrasonic device for oil shale staged hydraulic fracturing and construction method |
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