CN108195738A - A kind of three-dimensional fracture permeability apparatus of the wide adjustable interior visible of gap - Google Patents
A kind of three-dimensional fracture permeability apparatus of the wide adjustable interior visible of gap Download PDFInfo
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- CN108195738A CN108195738A CN201711403209.2A CN201711403209A CN108195738A CN 108195738 A CN108195738 A CN 108195738A CN 201711403209 A CN201711403209 A CN 201711403209A CN 108195738 A CN108195738 A CN 108195738A
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- 230000035699 permeability Effects 0.000 title claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 239000011521 glass Substances 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000000123 paper Substances 0.000 claims abstract description 14
- 239000000741 silica gel Substances 0.000 claims abstract description 14
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 14
- 238000010146 3D printing Methods 0.000 claims abstract description 12
- 239000011086 glassine Substances 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 238000004458 analytical method Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000001301 oxygen Substances 0.000 claims abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 5
- 238000002474 experimental method Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000005341 toughened glass Substances 0.000 claims description 7
- 239000003292 glue Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000011435 rock Substances 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 claims description 3
- 239000005357 flat glass Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 244000137852 Petrea volubilis Species 0.000 claims description 2
- 230000005574 cross-species transmission Effects 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 239000004425 Makrolon Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 claims 1
- 229920000515 polycarbonate Polymers 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 238000007405 data analysis Methods 0.000 abstract 1
- 238000013480 data collection Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000005496 tempering Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The present invention provides a kind of three-dimensional fracture permeability apparatus of the wide adjustable interior visible of gap, is made of permeameter, gas-liquid supply control system and data acquisition and analysis system three parts.Permeameter is mainly made of upper cover steel plate, silica gel plate, armorplate glass, the glassine paper for adhering to the coarse fissure-plane of 3D printing and this five part of lower wall steel plate.A conduit pipe is formd among two pieces of armorplate glasses of glassivation paper, aperture is adjusted using clearance gauge, and high-strength bolt connection sealing is used between five parts of permeameter.Gas-liquid supply portion provides pressure using electric pressure test pump and high-pressure air pipe, and control section uses valve regulated Fluid pressure, and seepage flow pipeline is connected using oxygen hose, and often place's connection has compound gasket sealing.Data collection and analysis part includes pressure sensor, flowmeter and recording instrument without paper, is transferred data in recording instrument without paper by pressure sensor, flowmeter, and completes the collection analysis of data in a computer.
Description
Technical field
The present invention relates to a kind of fields of the three-dimensional fracture permeability apparatus of the wide adjustable interior visible of gap.
Background technology
Existing two and three dimensions fracture seepage device all has some disadvantages and limitation, is mainly manifested in：When
Two-dimentional fracture seepage device can only the straight fissure-plane smooth, frictional force is small of template surface, but fissure-plane in practical engineering application
All it is coarse, it is impossible to two-dimentional smooth flat is properly termed as, so two-dimentional fracture seepage device cannot really mould fluid exist
Flow behavior on fissure-plane；Second is that the slab construction of three-dimensional fracture seepage apparatus is mostly used the coarse crack of slabstone real simulation
Face, this material can not realize visualization, inconvenient, and cost is high；Third, for common two dimension or three-dimensional fracture device,
For fluid by being directly entered after inlet in infiltration crack, this design method can lead to during the experiment that fluid cannot be equal
It is even to be completely paved with entire crack, cause stress data test inaccuracy, it is impossible to accurately measure permeability；Fourth, for common
Two dimension or three-dimensional fracture seepage apparatus, satisfactory test sample are difficult to and produce, and the aperture in sample crack is difficult to control
System.In view of the above-mentioned problems, the present invention provides a kind of three-dimensional fracture permeability apparatus of the wide adjustable interior visible of gap.
Invention content
The present invention provides the three-dimensional fracture permeability apparatus of a set of wide adjustable interior visible of gap, is supplied by permeameter, gas-liquid
Control system and data acquisition and analysis system three parts composition.Wherein crack permeameter is the master of the three-dimensional fracture seepage apparatus
Body portion, entire permeameter is mainly by carrying the upper cover steel plate, the silica gel plate for sealing, smooth tempering glass of 26 bolts hole
Glass plate, the glassine paper for adhering to the coarse fissure-plane of 3D printing and this five part of lower wall steel plate composition.It is coarse to against attachment 3D printing
A conduit pipe is formd among two pieces of armorplate glasses of the glassine paper of fissure-plane, aperture can be utilized according to requirement of experiment
The clearance gauge of different-thickness is adjusted.In " U-shaped " silica gel pad, two rectangle clearance gauge slots are reserved in upper and lower both sides respectively.It oozes
High-strength bolt connection sealing is used between five parts of saturating instrument.Gas-liquid supply portion uses hand held, electric hydraulic test pump and high pressure gas
Bottle provides the Fluid pressure in seepage channel, and control section tests the pressure of fluid using valve, overflow valve and decompression valve regulation.
Seepage flow pipeline uses internal diameter to be connected for the oxygen hose of 10mm by tube bank, connector with valve, and each junction is placed with combination
Gasket plays sealing function.Data acquisition control part include pressure sensor, turbine flowmeter, gas mass flow gauge,
MIK -4000D types recording instrument without paper and computer.It will be pressed by pressure sensor, turbine flowmeter and gas mass flow gauge
Power and data on flows are transmitted in recording instrument without paper.Recording instrument without paper is connect with computer, in a computer complete pressure and
The acquisition and analysis of data on flows.
Further, the true rock surface of laser scanning is printed to transparent glassine paper by the present invention by 3D printing technique
On, then glassine paper pasted up and down on two pieces of armorplate glasses, it realizes from two-dimentional smooth flat to three-dimensional coarse fissure-plane
Conversion, the application of this technology make simulation fissure-plane truer than the fissure-plane of ordinary two dimensional slit device, are filled than three-dimensional fracture
The fissure-plane materials put are less, cost is lower, more convenient operation, and can print different three according to different requirement of experiment
Tie up coarse fissure-plane.
Further, the crack of this permeameter, which makes, has certain flexibility, by being embedded to different-thickness in clearance gauge slot
Clearance gauge can realize the adjusting of fracture opening, it is easy to operation.
Particularly, the top surface of this permeameter lower wall steel plate is docked using steel plate and tempered glass, and seam crossing is glued using AB glue
Knot sealing, operating method：AB glue is fully applied to spill-over in seam crossing, after AB glue is done, is polishing to glue-line using sand paper
Flat smooth.In addition, the inlet of this permeameter is not arranged in end, and it is provided in the steel plate docked with tempered glass
On, fitted seal silica gel plate substantially increases the leakproofness of permeameter.One is set between inlet and pressure sensor interface
Buffer groove, enables fluid to uniformly enter in crack.Crack using pressure sensor pressure tap as starting point, pressure sensor
Pressure tap is arranged on the steel plate docked with tempered glass, and the pressure loss that fluid enters during crack can be avoided to survey pressure
The influence of accuracy of measurement, obtained pressure data are more accurate.
Further, the beneficial effects of the invention are as follows：The smooth fissure-plane of two dimension is improved to three-dimensional by 3D printing technique to split
Gap can go out flow behavior of the fluid in coarse crack with real simulation；The fracture opening of permeameter has certain can adjust
Range controls fracture opening according to different requirement of experiment using the clearance gauge of different-thickness；Pass through three tempering glass of upper cover plate
Glass observation window can clearly observe flow behavior of the fluid in crack in real time；By being set between inlet and crack
Buffer groove by pressure data acquire it is more accurate；By the design of water inlet position and silica gel plate shape, permeameter is improved
Leakproofness；By the arrangement of the side pressure point of pressure sensor, influence of the fluid flow pressure loss to measurement accuracy is avoided.
In addition, this crack permeability apparatus can both simulate flow behavior of the water, oil, gas three-phase in permeameter respectively, it can also be arbitrary
Two-phase three is combined, and simulates a series of relevant Seepage Experiment such as the flow behavior in permeameter, test permeability, also
Anti- row's flow behavior of fracturing fluid can be simulated in permeameter.The present apparatus is powerful, is widely used, and test result is accurate.
Description of the drawings
The invention will be further described below in conjunction with the accompanying drawings.
Fig. 1 is a kind of schematic diagram of the three-dimensional fracture permeability apparatus of the wide adjustable interior visible of gap, permeameter 1, observation window
11, inlet 12, liquid outlet 13, upper cover steel plate 14, gas-liquid supply control system 2, gate valve 21, overflow valve 22, pressure reducing valve 23, water
Pump 24, oil pump 25, gas tank 26, oxygen hose 27, data acquisition and analysis system 3, pressure sensor 31, flowmeter 32, no paper note
Record instrument 33, computer 34.
Fig. 2 is upper cover steel plate three-view diagram, observation window 11, High-strength bolt hole 15, upper cover steel plate 14.
Fig. 3 is the three-view diagram of lower wall steel plate, lower wall steel plate 16, buffer groove 17, observation window 11, High-strength bolt hole 15, into
Liquid mouth 12, liquid outlet 13, silica gel pad 10, clearance gauge slot 18, pressure sensor pressure tap 19.
Fig. 4 is the two isogonism shaft side figure up and down of permeameter.
Specific embodiment
With reference to the accompanying drawings, the present invention provides the three-dimensional fracture permeability apparatus of a set of wide adjustable interior visible of gap, by permeameter
1st, gas-liquid supply control system 2 and 3 three parts of data acquisition and analysis system composition.Wherein crack permeameter 1 is that the three-dimensional is split
The main part of gap seepage apparatus, entire permeameter is mainly by carrying the upper cover steel plate 14 of 26 High-strength bolt holes 15, for close
The silica gel plate 10 of envelope, upper and lower two pieces of smooth armorplate glasses, the attachment glassine paper of the coarse fissure-plane of 3D printing and lower wall steel
This five part of plate 16 forms.It againsts and forms one among two pieces of armorplate glasses of the glassine paper of the attachment coarse fissure-plane of 3D printing
A conduit pipe, aperture can be adjusted according to requirement of experiment using the clearance gauge of different-thickness.In " U-shaped " silica gel pad 10
In, two rectangle clearance gauge slots 18 are reserved in upper and lower both sides respectively.It is connected between five parts of permeameter 1 using high-strength bolt close
Envelope.Gas-liquid supply portion provides the Fluid pressure in seepage channel using water pump 24, oil pump 25 and gas tank 26, and control section uses
Overflow valve 22 and pressure reducing valve 23 adjust the pressure of test fluid.Seepage flow pipeline uses internal diameter to pass through pipe for the oxygen hose 27 of 10mm
Subpackage contains pressure sensor 31, flowmeter 32, MIK -4000D types recording instrument without paper 33 and computer 34.Pass through pressure sensor
31st, pressure and data on flows are transmitted in recording instrument without paper 33 by flowmeter 32.Recording instrument without paper 33 is connect with computer 34,
The acquisition and analysis of pressure and data on flows are completed in computer 34.
With reference to the accompanying drawings, the assembling of this covering device：The thickness of one piece " U-shaped " is made to be thicker than clearance gauge thickness 0.2mm as standard
Silica gel pad 10 will surround sealing one side opening in three faces between two pieces of tempered glass wait broad slits, and in the silicon of upper and lower both sides
The clearance gauge regulation and control fracture opening that two rectangles are used to place different-thickness as clearance gauge slot 18 is reserved in glue gasket 10 respectively.It will be attached
The glassine paper for the coarse fissure-plane of 3D printing is pasted onto armorplate glass inner surface up and down, and upper armorplate glass is put into permeameter
In 1 slot, silica gel pad 10 and clearance gauge are pushed down.A water guide is formd among upper and lower armorplate glass and silica gel pad 10 to lead to
Road, the three-dimensional fracture as made.On top, capping upper cover steel plate 14, high-strength with 26 with lower wall steel plate 16 by upper cover steel plate 14
It spends bolt and carries out closed reinforcing.Permeameter 1 is connected, and install pressure sensor by pipeline with gas-liquid supply control system 2
31.Loine pressure is provided by water pump 24, oil pump 25 and gas tank 26, and fluid flow is measured by flowmeter 32 in pipeline, permeable pressure head
It is measured by pressure sensor 31.
With reference to the accompanying drawings, the use process of this covering device, fracturing fluid is counter to arrange flow behavior to simulate, and Fluid pressure is carried by water pump
For for (oil pump, air pump are similarly)：Before experiment, fracturing fluid and proppant particles are injected into conduit pipe.After experiment starts,
Fluid is pumped out from water pump 24, adjusts Fluid pressure according to requirement of experiment through overflow valve 22, the flow flowed through is recorded through flowmeter 32,
In data on flows synchronized upload to recording instrument without paper 33, inlet 12 is flowed into through gate valve 21, flow flows to buffer groove 17, then
Tiling to entire three-dimensional fracture face, initial pressure is recorded simultaneously immediately by the pressure sensor that pressure sensor pressure tap 19 connects
In synchronized upload to recording instrument without paper 33, gap is wide to be controlled according to different requirement of experiment using the clearance gauge of different model.Flow carries
The anti-flow process arranged of fracturing fluid is simulated by crack for hydraulic pressure, drainpipe is flowed by liquid outlet 13.The present apparatus is in each pipe
Road interface has O-ring and compound gasket, substantially increases the leakproofness of device.The present apparatus is convenient for disassembly and assembly, can repeat to make
With, it is powerful, it is widely used, test result is accurate, can also carry out functions expanding and secondary development, and video of arranging in pairs or groups is micro-
System can realize the real-time microcosmic monitoring of crack fluid flow inside.
Claims (5)
1. the present invention provides the three-dimensional fracture permeability apparatus of a set of wide adjustable interior visible of gap, by permeameter 1, gas-liquid supply control
System 2 processed and 3 three parts of data acquisition and analysis system composition.Wherein crack permeameter 1 is the three-dimensional fracture seepage apparatus
Main part, entire permeameter mainly by carry 26 High-strength bolt holes 15 upper cover steel plate 14, for sealing silica gel plate 10,
Upper and lower two pieces of smooth armorplate glasses adhere to the glassine paper of the coarse fissure-plane of 3D printing and lower wall steel plate 16 this five parts group
Into.It againsts and forms a conduit pipe among two pieces of armorplate glasses of the glassine paper of the attachment coarse fissure-plane of 3D printing, open
Degree can be adjusted according to requirement of experiment using the clearance gauge of different-thickness.In " U-shaped " silica gel pad 10, upper and lower both sides point
It Yu Liu not two rectangle clearance gauge slots 18.High-strength bolt connection sealing is used between five parts of permeameter 1.Gas-liquid supply portion is adopted
The Fluid pressure in seepage channel is provided with water pump 24, oil pump 25 and gas tank 26, control section uses overflow valve 22 and pressure reducing valve
23 adjust the pressure of test fluid.Seepage flow pipeline uses internal diameter to contain pressure sensor by pipe subpackage for the oxygen hose 27 of 10mm
31st, flowmeter 32, MIK -4000D types recording instrument without paper 33 and computer 34.It will be pressed by pressure sensor 31, flowmeter 32
Power and data on flows are transmitted in recording instrument without paper 33.Recording instrument without paper 33 is connect with computer 34, it is complete in computer 34
Into the acquisition and analysis of pressure and data on flows.
2. a kind of three-dimensional fracture permeability apparatus of the wide adjustable interior visible of gap according to claim 1, it is characterised in that：
This permeameter 1 on the glassine paper for pasting upper and lower two pieces of armorplate glasses by using 3D printing technique, by laser scanning
Rock fracture face is printed to using makrolon material on glassine paper, is realized and is turned from two-dimentional smooth flat to three-dimensional fracture face
Change, the application of this technology makes simulation fissure-plane more be connect with crack in practical rock than the fissure-plane of ordinary two dimensional slit device
Closely, rock fracture system materials more entire than 3D printing are less, cost is lower, more convenient operation, and can be according to different realities
It tests requirement and prints different three-dimensional fracture faces.
3. a kind of three-dimensional fracture permeability apparatus of the wide adjustable interior visible of gap according to claim 1, it is characterised in that：
The crack of this permeameter 1, which makes, has certain flexibility, can be realized by the clearance gauge that different-thickness is embedded in clearance gauge slot 18
The adjusting of fracture opening, it is easy to operation.
4. a kind of three-dimensional fracture permeability apparatus of the wide adjustable interior visible of gap according to claim 1, it is characterised in that：
The top surface of this permeameter lower wall steel plate 16 is docked using steel plate and tempered glass, and seam crossing is bonded and sealed using AB glue, operation side
Method：AB glue is fully applied to spill-over in seam crossing, after glass cement is done, glue-line is polishing to flat smooth using sand paper.Separately
Outside, the inlet 12 of this permeameter is not arranged in end, and is provided on the steel plate docked with tempered glass, fitted seal
Silica gel plate substantially increases the leakproofness of permeameter 1.One is set between inlet 12 and pressure sensor pressure tap 19 to delay
Groove 17 is rushed, fluid is enable to uniformly enter in crack.Crack is starting point with pressure sensor pressure tap 19, pressure sensor 31
Pressure tap 19 be arranged on the steel plate docked with tempered glass, fluid can be avoided to enter the pressure loss during crack to pressure
The influence of power measurement accuracy, obtained pressure data are more accurate.
5. content more than is intended in the patent within protection domain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711403209.2A CN108195738B (en) | 2017-12-22 | 2017-12-22 | Internally visible three-dimensional crack penetration device with adjustable gap width |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711403209.2A CN108195738B (en) | 2017-12-22 | 2017-12-22 | Internally visible three-dimensional crack penetration device with adjustable gap width |
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| Publication Number | Publication Date |
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| CN108195738A true CN108195738A (en) | 2018-06-22 |
| CN108195738B CN108195738B (en) | 2021-02-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711403209.2A Active CN108195738B (en) | 2017-12-22 | 2017-12-22 | Internally visible three-dimensional crack penetration device with adjustable gap width |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879287A (en) * | 2019-12-17 | 2020-03-13 | 天津大学 | Hull-Shore sheet testing apparatus with adjustable plate spacing |
| CN111504872A (en) * | 2020-04-16 | 2020-08-07 | 武汉大学 | Variable-opening detachable simulated crack test device and test method |
| CN111638169A (en) * | 2020-06-10 | 2020-09-08 | 中国石油大学(华东) | Rock three-dimensional fracture network seepage distribution testing system and method |
| CN111811995A (en) * | 2020-07-17 | 2020-10-23 | 中国地质大学（北京） | Visual test method and system for simulating coarse single-cross fracture multiphase seepage |
| CN113340785A (en) * | 2021-06-03 | 2021-09-03 | 鲁东大学 | Multifunctional visual cylindrical surface crack penetration device and use method thereof |
| CN113533157A (en) * | 2021-07-02 | 2021-10-22 | 浙江大学 | Variable-opening detachable fracture device for visual experiment |
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| CN102809528A (en) * | 2012-08-03 | 2012-12-05 | 中国石油天然气股份有限公司 | Three-phase relative permeability testing system based on CT (computed tomography) scanning |
| CN103940719A (en) * | 2014-04-15 | 2014-07-23 | 西安科技大学 | Coal body permeability characteristic testing system and method |
| CN107167409A (en) * | 2017-05-27 | 2017-09-15 | 四川大学 | 3D printing point shape Single Fracture seepage flow experiment system and experimental method under Multiple experiments operating mode coupling |
-
2017
- 2017-12-22 CN CN201711403209.2A patent/CN108195738B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102809528A (en) * | 2012-08-03 | 2012-12-05 | 中国石油天然气股份有限公司 | Three-phase relative permeability testing system based on CT (computed tomography) scanning |
| CN103940719A (en) * | 2014-04-15 | 2014-07-23 | 西安科技大学 | Coal body permeability characteristic testing system and method |
| CN107167409A (en) * | 2017-05-27 | 2017-09-15 | 四川大学 | 3D printing point shape Single Fracture seepage flow experiment system and experimental method under Multiple experiments operating mode coupling |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879287A (en) * | 2019-12-17 | 2020-03-13 | 天津大学 | Hull-Shore sheet testing apparatus with adjustable plate spacing |
| CN111504872A (en) * | 2020-04-16 | 2020-08-07 | 武汉大学 | Variable-opening detachable simulated crack test device and test method |
| CN111638169A (en) * | 2020-06-10 | 2020-09-08 | 中国石油大学(华东) | Rock three-dimensional fracture network seepage distribution testing system and method |
| CN111811995A (en) * | 2020-07-17 | 2020-10-23 | 中国地质大学（北京） | Visual test method and system for simulating coarse single-cross fracture multiphase seepage |
| CN111811995B (en) * | 2020-07-17 | 2022-04-15 | 中国地质大学（北京） | Visual test method and system for simulating coarse single-cross fracture multiphase seepage |
| CN113340785A (en) * | 2021-06-03 | 2021-09-03 | 鲁东大学 | Multifunctional visual cylindrical surface crack penetration device and use method thereof |
| CN113533157A (en) * | 2021-07-02 | 2021-10-22 | 浙江大学 | Variable-opening detachable fracture device for visual experiment |
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| CN108195738B (en) | 2021-02-19 |
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