CN107449708B - A method of it simulating polymorphic combination coalmass crevasse and barriering effect is moved to water transport - Google Patents
A method of it simulating polymorphic combination coalmass crevasse and barriering effect is moved to water transport Download PDFInfo
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 89
- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000000694 effects Effects 0.000 title claims abstract description 28
- 238000012360 testing method Methods 0.000 claims abstract description 55
- 239000002817 coal dust Substances 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 239000003245 coal Substances 0.000 claims description 40
- 238000009792 diffusion process Methods 0.000 claims description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000004088 simulation Methods 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 230000000007 visual effect Effects 0.000 claims description 9
- 238000002474 experimental method Methods 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 5
- 239000000725 suspension Substances 0.000 claims description 5
- 239000012153 distilled water Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
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- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 9
- 238000011160 research Methods 0.000 description 9
- 230000004888 barrier function Effects 0.000 description 4
- 238000013508 migration Methods 0.000 description 4
- 230000005012 migration Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000000280 densification Methods 0.000 description 2
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- 238000004821 distillation Methods 0.000 description 1
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- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000009417 prefabrication Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000003325 tomography Methods 0.000 description 1
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Abstract
The invention discloses a kind of methods simulated polymorphic combination coalmass crevasse and move barriering effect to water transport, the following steps are included: (1) Mold Making: production cube structure mold, mold upper and lower opening opens wide, two pieces of production and the matched bottom plate of die size, (2) prefabricated crack makes: so that prefabricated crack is fixed on mould inside on disk groove Interal fixation, the coal dust being stirred is put into mold；Using bottom plate a, different angle, different in width, perforation or non-through single crack can be obtained；Using bottom plate b, different crack combinations can be obtained；(3) test specimen seals；(4) it fills the water: placing sponge identical with test specimen floor space in test piece upper part, red ink is injected into sponge；(5) high-speed camera records: by the increase speed common observation, record of water in high-speed camera and 500ml measuring cup, comparing different shape, the barriering effect that water transport is moved in various combination crack.Production method of the present invention is easy, is convenient for operation.
Description
Technical field
The present invention relates to a kind of method simulated polymorphic combination coalmass crevasse and move barriering effect to water transport, main research exists
The method for the barriering effect that water transport is moved under conditions of prefabricated different shape crack, various combination crack.
Background technique
During coal production, prevention and treatment water problems is a big technical problem of production and scientific research.In recent years, water leak accident
Caused by death toll sharply increase, so research coal seam water bearing features and migration rule be particularly important.In coal seam
In, the main thoroughfare that water transport moves is crack and tomography.Coal is developed into as a kind of inhomogeneous porous body, internal crack
It is ripe, and fractured zones be it is sufficiently complex, due to the presence in crack, so that the flow direction of water in coal seam, flow are very big
Distribution arrangement, geometric shape, syntagmatic in degree depending on crack.In process of production, crack is influenced by pressure, no
Disconnected extension and densification, at this moment the transport conditions of water can also change, when crack propagation to a certain extent, the flowing of water can be from layer
Rheology is turbulent flow, when neighbouring preservation has water-bearing layer, will shove, cause the generation of water inrush accident.So research water is in coal
Transport conditions in layer crack are very necessary.
Paper that Luo Rongwu is delivered " mechanics parameter and its Experimental Study on Seepage Characteristics of preset crack test specimen are studied " (2009, in
Southern university page 89) in, using longitudinal prefabricated crack seepage tests method, crack is in non-filler, breakthrough status,
For pressure water by test specimen upper surface prefabricated crack seepage flow, the method that lower surface is communicated with air studies infiltration of the water in crack
Stream, but it is using crack as the migration pathway of water, and the barrier that water transport moves is made in prefabrication transverse crack research crack in coal sample
Research is less.
One kind is described application No. is 201610574945.3 Chinese invention patent to intersect for fluid in fine and close rock mass
The simulation densification rock mass of seepage flow mechanism research in crack intersects crack permeation flow tester, but it uses rock sample, and
It is rarely reported in the research of prefabricated crack in coal test specimen.
In coal test specimen transverse direction prefabricated crack, longitudinal seepage flow, different shape, various combination crack have one to the migration of water
Fixed barrier action, thus research horizontally prefabricated different shape, various combination crack be to the barrier situation that water transport moves
Very necessary, this can prevent and treat for coal mine water leak accident and provide important scientific basis.
Summary of the invention
The present invention is intended to provide a kind of method simulated polymorphic combination coalmass crevasse and barriering effect is moved to water transport, production
Prefabricated crack test specimen observes that different crack forms, crack combine the barriering effect moved to water transport well.
The polymorphic method for combining coalmass crevasse and barriering effect being moved to water transport is simulated the present invention provides a kind of, including following
Step:
(1) Mold Making: die size is fabricated to 100mm × 100mm × 100mm as needed, and mold upper and lower opening opens wide,
Make two pieces of bottom plate with the matched 100mm × 100mm of die size, bottom plate thickness 10mm；Bottom plate a has with bottom plate center m for circle
The heart, the circular hole that diameter is 50mm；Bottom plate b has respectively with point n1,n2For two circular holes that the center of circle, diameter are 50mm,
Middle n1、n2For the center of circle of two tangent circles on the middle line of bottom plate；It is equipped with and the matched circle of its size at above-mentioned circular hole
Disk, disk can have scale and can rotate freely, original state disk is located at 0 ° of angle on circular hole on disk；Disk edge
Diametrical direction is provided with groove；It can be respectively in the steel plate insertion groove of 0.5mm, 1mm, 1.5mm by thickness.
(2) prefabricated crack makes: so that prefabricated crack is fixed on mould inside on disk groove Interal fixation, then will
Original coal sample crushes, and it is the coal dust of 0.2-0.25mm that sieve, which takes granularity,；Distilled water is added into coal dust, and (moulded coal test specimen made of making contains
Water rate is stirred evenly up to 2%)；The coal dust being stirred is put into mold；Using the mold that bottom plate a is housed, rotating circular disk makes
Disc angle distinguishes 0 °, 30 °, 60 °, 90 °；The development degree of different configuration position cracks in coal seam is also different within coal mines, fold
Position fracture density is big, and length and height are relatively large, especially anticline axle portion, and Fracture Width maximum reaches 0.28-1.4mm,
So choosing length is 100mm, thickness is respectively the steel plate of 0.5mm, 1mm, 1.5mm to change the thickness of prefabricated crack；Pass through
The steel plate that length is 50mm is chosen, to form intermittent fracture, to simulate different angle, different in width, perforation or non-through
Single crack；Using the mold that bottom plate b is housed, two disks are rotated, two prefabricated cracks is made to be in parallel, junction geometry
Positional relationship, to simulate different crack combinations.100mm is made with the pressure of 100 MPa on 200 t stiff experiment machines
The standard moulded coal test specimen of × 100mm × 100mm.It using orthogonal design, reduces and repeats experimental group number, 16 groups of test specimen is made.
(3) test specimen seals: overturning test specimen is horizontally oriented prefabricated crack, then by vertical with horizontal direction four
A plane covers layer of transparent heat-shrink tube, is heated using heat gun, shrinks heat-shrink tube, sealed test piece avoids water from side seepage flow.
Coal sample weighing is placed in the container of the big 6mm of inside dimension side ratio test specimen, test specimen can be made to wrap heat-shrink tube and be just put into
Container.Container bottom is porous disc, and is connected to 500ml measuring cup.
(4) it fills the water: placing sponge identical with test specimen floor space in test piece upper part, the red ink of 500ml is injected into sponge
Water is nature seepage flow when serving as water source using sponge, and in many practical problems, big rimala staggeredly occurs, and mostly by thin
Granule medium is filled, and keeps the flowing of underground water very slow on the whole, substantially conforming to Darcy's law, this method can be regarded as
Diffusion motion of the water in micropore and dead end hole, when water is from moistening stronger region to moistening poor and curvature is lesser
When diffusion motion is made in region, diffusion motion is one-dimensional, is represented by the following formula:
In formula,For the increment of moisture in coal after diffusion；
D is diffusion coefficient；
X is liquid along capillariomotor distance；
T is the time.
If the time is to count i.e. t=0 since diffusion process, and on the boundary in the region and liquid diffusion source that are discussed
The moisture increment of (such as on prefabricated crack boundary) is possible maximum value i.e. X=0, initial and boundary condition is substituted into above formula, then
It is available that moisture incrementss in coal sample are made by molecule diffusion motion are as follows:
In formula, a be within given time due to molecule diffusion motion make in micropore moisture increase and fill hole be
Number, is obtained, it is related with the property of capillary, liquid by experiment；αkFor capillary moving coefficient, r is capillary radius.
Controlled at 25 DEG C, 2d is placed.
(5) high-speed camera records: installing visual window additional in container side, is observed using high-speed camera by visual window red
Diffusion motion of the ink in test specimen records suspension time of droplet of prefabricated crack upper surface, water in 500ml measuring cup in real time
It increases speed, to the barriering effect for comparing different shape, various combination prefabricated crack moves water transport.
Above-mentioned analogy method, die bottom plate can be embedded in disk in the step (1), have scale on disk and can freely revolve
Turn, disk is diametrically provided with groove, and the steel plate of different-thickness can be inserted into groove.
In the step (2), using the mold that bottom plate a is housed, rotating circular disk, make disc angle be respectively 0 °, 30 °,
60°,90°；Selection length is 100mm, and thickness is respectively the steel plate of 0.5mm, 1mm, 1.5mm to change the thickness of prefabricated crack；
The steel plate that length is 50mm is chosen, to form intermittent fracture, to simulate different angle, different in width, perforation or non-through
Single crack；
Using the mold that bottom plate b is housed, two disks are rotated, two prefabricated cracks is made to be in parallel, junction geometry position
Relationship is set, to simulate different crack combinations.
It is to the method for test specimen sealing in the step (3): uses transparent heat-shrink tube, be placed in container, test specimen and container
It fits closely.
In the step (3), the lower vessel portion has porous disc, is connected to 500ml measuring cup below porous disc, records water
Collect situation.
In step (4) the injecting process, is filled the water by sponge, spread water uniformly since test specimen upper surface.
In the step (4), by injecting red ink, diffusion motion of the water in test specimen can be observed at any time.
In the step (5), by the increase speed common observation, record of water in high-speed camera and 500ml measuring cup,
Compare different shape, the barriering effect that water transport is moved in various combination crack.
Beneficial effects of the present invention:
A kind of physical analogy side for simulating the barriering effect that polymorphic combination coalmass crevasse moves water transport provided by the invention
Method, the production method of prefabricated crack is easy, easy to operate, simply and effectively observes crack using high-speed camera and measuring cup
Barrier action of the boundary effect to water.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the mold equipped with bottom plate a.
Fig. 2 is the structural schematic diagram of the mold equipped with bottom plate b.
Fig. 3 is the schematic diagram of 0 °, 30 °, 60 °, 90 ° prefabricated crack of different angle.
Fig. 4 is the schematic diagram of various combination prefabricated crack (parallel, junction).
Fig. 5 is that the method for the present invention tests schematic diagram.
Wherein 1- steel plate, 2- disk, 3- mold, 4- groove, 5- porous disc, 6- container, 7-500ml measuring cup, 8- sponge, 9-
Visual window, 10- prefabricated crack.
Specific embodiment
The present invention is further illustrated below by embodiment, but is not limited to following embodiment.
Embodiment 1:
Fig. 1, mold described in 2 structural schematic diagram in, wherein 1 is steel plate, 2 be disk, and 3 be mold, and 4 be groove, steel
It is respectively that 0.5mm, 1mm, 1.5mm, 3 groups that length × width is 100mm × 50mm and thickness are respectively that the specifications parameter of plate, which has thickness,
0.5mm, 1mm, 1.5mm, 3 groups, totally 6 groups that length × width is 50mm × 50mm；Mold is mainly opened wide by upper and lower opening, having a size of
100mm × 100mm × 100mm frame with the matched length × width of frame size be 100mm × 100mm, with a thickness of 10mm's
Two pieces of bottom plate a, b assemble respectively；The circle using bottom plate center m as the center of circle, diameter for 50mm is offered in Fig. 1 insole board
Hole, and be respectively 0.5mm, 1mm, 1.5mm, 1 group of disk that diameter is 50mm equipped with recess width；It is opened up in Fig. 2 insole board b
Have with n1,n2For two circular holes that the center of circle, diameter are 50mm, wherein n1、n2It is tangent for two on the middle line of bottom plate
The round center of circle；And being furnished with recess width is respectively 0.5mm, 1mm, 1.5mm, 2 groups of disk that diameter is 50mm.
In the schematic diagram of 0 °, 30 °, 60 °, 90 ° prefabricated crack of different angle described in Fig. 3, the production side of 0 ° of prefabricated crack
Method is to make Interal fixation on disk groove prefabricated crack 10 to be fixed on mould inside, and rotating circular disk makes 0 ° of disc angle,
Then original coal sample is crushed, it is the coal dust of 0.2-0.25mm that sieve, which takes granularity,.27ml distilled water is added into coal dust, and stirs equal
It is even.The coal dust being stirred is put into mold, on 200 t stiff experiment machines with the pressure of 100 MPa be made 100mm ×
0 ° of prefabricated crack moulded coal test specimen of 100mm × 100mm.30 °, 60 °, 90 ° of prefabricated crack moulded coal test specimens by rotating circular disk angle,
It repeats the above steps, can be prepared by.
In the schematic diagram of various combination prefabricated crack described in Fig. 4, the geometry site of two groups of prefabricated cracks is respectively
In parallel and junction, it can be realized by using the mold equipped with bottom plate b, rotating circular disk be such that two groups of steel plates are respectively in parallel
With the position of junction, original coal sample is crushed, it is the coal dust of 0.2-0.25mm that sieve, which takes granularity,.27ml distillation is added into coal dust
Water, and stir evenly.The coal dust being stirred is put into mold, with the pressure system of 100 MPa on 200 t stiff experiment machines
At 100mm × 100mm × 100mm various combination prefabricated crack moulded coal test specimen.
The method of the present invention described in Fig. 5 is tested in schematic diagram, wherein 5 be porous disc, 6 be container, and 7 be 500ml measuring cup, and 8
It is sponge, 9 be visual window, and 10 be prefabricated crack.It will be put into container after the sealing of prefabricated crack moulded coal test specimen by transparent heat-shrink tube,
Sponge is placed in test piece upper part, the red ink of 500ml is injected into sponge, red ink diffuses to container bottom in test specimen, leads to
It crosses container bottom porous disc and flows into 500ml measuring cup.It is recorded in real time using high-speed camera from visual window during the test prefabricated
The increased speed of water in suspension time of the droplet of crack upper surface, 500ml measuring cup observes red ink in prefabricated crack moulded coal
Diffusion motion in test specimen.Controlling room temperature is 25 DEG C, test period 2d.
The method for moving barriering effect to water transport using the polymorphic combination coalmass crevasse of present invention simulation, specifically includes following step
It is rapid:
(1) Mold Making: as illustrated in fig. 1 and 2, die size is fabricated to 100mm × 100mm × 100mm, mould as needed
Have 3 upper and lower openings to open wide, makes two pieces of bottom plate with the matched 100mm × 100mm of die size, bottom plate thickness 10mm；Bottom plate a have with
Bottom plate center m is the center of circle, the circular hole that diameter is 50mm, and bottom plate b has with n1,n2For two circles that the center of circle, diameter are 50mm
Hole, wherein n1、n2For the center of circle of two tangent circles on the middle line of bottom plate；Separately have and the matched circle of circular hole size
Disk 2, disk 2 can have scale and can rotate freely, initial disk is located at 0 ° of angle on circular hole on disk 2.Disk is along straight
Diameter direction fluted 4.It can be respectively in the insertion groove 4 of steel plate 1 of 0.5mm, 1mm, 1.5mm by thickness.
(2) prefabricated crack makes: steel plate 1, which is fixed on disk groove 4, is fixed on prefabricated crack 10 inside mold 3,
Then original coal sample is crushed, it is the coal dust of 0.2-0.25mm that sieve, which takes granularity,.Appropriate distilled water is added into coal dust, and stirs equal
It is even.The coal dust being stirred is put into mold.Using be equipped with bottom plate a mold, rotating circular disk, make disc angle distinguish 0 °,
30°,60°,90°；The development degree of different configuration position cracks in coal seam is also different within coal mines, and fold position fracture density is big,
Length and height are relatively large, especially anticline axle portion, and Fracture Width maximum is up to 0.28-1.4mm, so selection length is
100mm, thickness are respectively the steel plate of 0.5mm, 1mm, 1.5mm to change the thickness of prefabricated crack；It is 50mm by choosing length
Steel plate, penetrated through with forming crack half, to simulate different angle, different in width, perforation or non-through single crack；It uses
Mold equipped with bottom plate b rotates two disks, so that two prefabricated cracks is in parallel, junction geometry site, to mould
Intend different crack combinations.100mm × 100mm × 100mm is made with the pressure of 100 MPa on 200 t stiff experiment machines
Standard moulded coal test specimen.It using orthogonal design, reduces and repeats experimental group number, 16 groups of sample is made.
(3) sample seals: overturning sample is horizontally oriented prefabricated crack, then by vertical with horizontal direction four
A plane covers layer of transparent heat-shrink tube, is heated using heat gun, shrinks heat-shrink tube, seals sample, avoids water from side seepage flow.
Coal sample weighing is placed in the container 6 of the big 6mm of inside dimension side ratio sample, sample can be made to wrap heat-shrink tube and be just put into
Container.Container bottom is porous disc 5, and is connected to 500ml measuring cup 7.
(4) it fills the water: placing sponge 8 identical with sample floor space on sample top, inject 55.81ml's in Xiang Haimian 8
Red ink is nature seepage flow when serving as water source using sponge, and between many reality in topic, big rimala staggeredly occurs, and mostly by
Fine grained medium is filled, and keeps the flowing of underground water very slow on the whole, substantially conforming to Darcy's law, this method can
Be seen as diffusion motion of the water in micropore and dead end hole, when water from moisten stronger region to moisten poor and curvature compared with
When diffusion motion is made in small region, diffusion motion is one-dimensional, is represented by the following formula:
In formula
For the increment of moisture in coal after diffusion；
D is diffusion coefficient；
X is liquid along capillariomotor distance；
T is the time.
If the time is to count i.e. t=0 since diffusion process, and on the boundary in the region and liquid diffusion source that are discussed
The moisture increment of (such as on prefabricated crack boundary) is possible maximum value i.e. X=0, initial and boundary condition is substituted into above formula, then
It is available that moisture incrementss in coal sample are made by molecule diffusion motion are as follows:
A is to fill the coefficient of hole since molecule diffusion motion increases moisture in micropore within given time, by
Experiment obtains, it is related with the property of capillary, liquid；αkFor capillary moving coefficient, r is capillary radius.
Controlling room temperature is 25 DEG C, places 2d.
(5) high-speed camera records: installing visual window 9 additional in container side, is observed using high-speed camera by visual window
The diffusion motion of red ink in the sample records suspension time, the 500ml amount water in the cup of the droplet of prefabricated crack upper surface in real time
The case where amount increases, to the barriering effect for comparing different shape, various combination prefabricated crack moves water transport.
Summarize above-mentioned specific implementation method, prefabricated crack moulded coal test specimen production method provided by the invention and existing method phase
Than, take rotating circular disk angle, using equipped with bottom plate b mold, replacement different-thickness steel plate, using length × width be 50mm ×
The measures such as the steel plate of 50mm can be obtained containing different angle, different in width, perforation or non-through single crack and different cracks
Combined test specimen.Test method of the invention realizes test specimen compared with existing test, by using red ink and high-speed camera
The visualization of middle water diffusion motion can be used for analyzing the migration rule of water in different prefabricated crack test specimens；Examination of the present invention
Proved recipe method is able to achieve the effective simulation for the barriering effect that polymorphic combination coalmass crevasse moves water transport, is recorded by high-speed camera
Suspension time of droplet of prefabricated crack upper surface, the data that water is increased speed in 500ml measuring cup, can be to than less
The barriering effect that same form, various combination prefabricated crack move water transport provides important scientific basis for the prevention and treatment of coal mine water leak accident.
Claims (9)
1. a kind of method simulated polymorphic combination coalmass crevasse and move barriering effect to water transport, it is characterised in that including following step
It is rapid:
(1) Mold Making:
The mold of cube structure is made, mold upper and lower opening opens wide, two pieces of production and the matched bottom plate of die size, on bottom plate a
There is the circular hole using bottom plate center m as the center of circle, diameter for 50mm, bottom plate b has respectively with point n1,n2For the center of circle, diameter 50mm
Two circular holes, wherein n1、n2For the center of circle of two tangent circles on the middle line of bottom plate；It is equipped at circular hole
Size matched disk has scale on disk and can rotate freely, and original state disk is located at 0 ° of angle；
(2) prefabricated crack makes: so that prefabricated crack is fixed on mould inside on disk groove Interal fixation, it then will be original
Coal sample crushes, and it is the coal dust of 0.2-0.25mm that sieve, which takes granularity,；Distilled water is added into coal dust, makes manufactured moulded coal test specimen moisture content
Up to 2%, and stir evenly；The coal dust being stirred is put into mold；Using bottom plate a, can obtain different angle, different in width,
Perforation or non-through single crack；Using bottom plate b, different crack combinations can be obtained；
100mm × 100mm × 100mm standard moulded coal test specimen is made with the pressure of 100MPa on 200t stiff experiment machine；It adopts
It with orthogonal design, reduces and repeats experimental group number, 16 groups of test specimen is made；
(3) test specimen seals: overturning test specimen is horizontally oriented prefabricated crack, then flat by four vertical with horizontal direction
Surface cover layer of transparent heat-shrink tube, is heated using heat gun, shrinks heat-shrink tube, and sealed test piece avoids water from side seepage flow；By coal
Sample weighing is placed in container, and container bottom is porous disc；
(4) it fills the water: placing sponge identical with test specimen floor space in test piece upper part, red ink is injected into sponge, uses sponge
It is nature seepage flow when serving as water source；The diffusion motion of water is one-dimensional, is represented by the following formula:
In formula, △ MkFor the increment of moisture in coal after diffusion；
D is diffusion coefficient；
X is liquid along capillariomotor distance；
T is the time；
If the time is to count i.e. t=0 since diffusion process, and the water on the boundary in the region and liquid diffusion source that are discussed
Dividing increment is possible maximum value i.e. X=0, and initial and boundary condition is substituted into above formula, obtains making coal sample by molecule diffusion motion
Middle moisture incrementss are as follows:
In formula, a is to fill the coefficient of hole since molecule diffusion motion increases moisture in micropore within given time, by
Experiment obtains, it is related with the property of capillary and liquid；αkFor capillary moving coefficient, r is capillary radius；
Controlled at 25 DEG C, 2d is placed；
(5) high-speed camera records: installing visual window additional in one vertical plane of container, is observed using high-speed camera by visual window
Diffusion motion of the red ink in test specimen, in the suspension time and 500ml measuring cup for recording the droplet of prefabricated crack upper surface in real time
Water is increased speed, the barriering effect moved to compare different shape and various combination prefabricated crack to water transport.
2. the method that the polymorphic combination coalmass crevasse of simulation according to claim 1 moves barriering effect to water transport, feature
Be: the circular hole of die bottom plate can be embedded in disk in the step (1), and disk is diametrically provided with groove, different thick
The steel plate of degree can be inserted into groove.
3. the method that the polymorphic combination coalmass crevasse of simulation according to claim 2 moves barriering effect to water transport, feature
Be: the steel plate of the different-thickness refers to that thickness is respectively the steel plate of 0.5mm, 1mm, 1.5mm.
4. the method that the polymorphic combination coalmass crevasse of simulation according to claim 1 moves barriering effect to water transport, feature
Be: the die size is fabricated to 100mm × 100mm × 100mm, and production is with the matched 100mm × 100mm's of die size
Two pieces of bottom plate, bottom plate thickness 10mm.
5. the method that the polymorphic combination coalmass crevasse of simulation according to claim 1 moves barriering effect to water transport, feature
Be: in the step (2), using the mold that bottom plate a is housed, rotating circular disk makes disc angle distinguish 0 °, 30 °, 60 °, 90 °；
Selection length is 100mm, and thickness is respectively the steel plate of 0.5mm, 1mm, 1.5mm to change the thickness of prefabricated crack；Choose length
For the steel plate of 50mm, to form intermittent fracture, to simulate different angle, different in width, perforation or non-through single split
Gap；
Using the mold that bottom plate b is housed, two disks are rotated, so that two prefabricated cracks is in parallel, junction geometric position and closes
System, to simulate different crack combinations.
6. the method that the polymorphic combination coalmass crevasse of simulation according to claim 1 moves barriering effect to water transport, feature
It is: in the step (3), chooses the inside dimension big 6mm of side ratio test specimen of container, so that test specimen is wrapped heat-shrink tube and be just put into
Container；The lower vessel portion has porous disc, is connected to 500ml measuring cup below porous disc, records the collection situation of water.
7. the method that the polymorphic combination coalmass crevasse of simulation according to claim 1 moves barriering effect to water transport, feature
Be: in the step (3), the method to test specimen sealing is: using transparent heat-shrink tube, is placed in container, test specimen is tight with container
Closely connected conjunction.
8. the method that the polymorphic combination coalmass crevasse of simulation according to claim 1 moves barriering effect to water transport, feature
It is: in step (4) the injecting process, is filled the water by sponge, spread water uniformly since test specimen upper surface；Pass through injection
Red ink can observe diffusion motion of the water in test specimen at any time.
9. the method that the polymorphic combination coalmass crevasse of simulation according to claim 1 moves barriering effect to water transport, feature
It is: in the step (5), observes and record jointly by increasing speed for water in high-speed camera and 500ml measuring cup, than
The barriering effect that water transport is moved compared with different shape, various combination crack.
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