CN107957382A - The pilot system and method that simulation goaf three absorbs water with coal and rock diffusion - Google Patents
The pilot system and method that simulation goaf three absorbs water with coal and rock diffusion Download PDFInfo
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- CN107957382A CN107957382A CN201711081203.8A CN201711081203A CN107957382A CN 107957382 A CN107957382 A CN 107957382A CN 201711081203 A CN201711081203 A CN 201711081203A CN 107957382 A CN107957382 A CN 107957382A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
- G01N13/04—Investigating osmotic effects
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- 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
Abstract
The present invention provides a kind of pilot system and method simulated goaf three and absorbed water with coal and rock diffusion, belongs to the technical field of coal and rock Penetration Signature research, and coal rock specimen includes complete moulded coal test specimen, the test specimen of moulded coal containing crack and scattered coal test specimen in the system；Infiltration experiment device includes cylinder body；Inhalant region that cylinder body includes connect with water system, for placing coal rock specimen and there is the trial zone of visual window and the catchment that is connected with water quality analytical system；Water supply installation is used to provide simulation water source to catchment；Drill core device includes being used for the sampler to the test specimen core boring sampling of moulded coal containing crack；Water analysis outfit is used to collecting and analyzing the water sample from catchment discharge；Image conversion device is used for through the extension in crack and developmental state in the visual window record test specimen of moulded coal containing crack.This system can simulate goaf three and absorb water with coal and rock diffusion and study the effect of different quality, the underground water of different hydraulic pressure in process of osmosis to coal and rock.
Description
Technical field
The technical field of coal and rock Penetration Signature research of the present invention, three band of goaf is simulated more particularly to one kind
The pilot system and method for coal and rock diffusion water suction.
Background technology
During coal production, water damage prevention is a big technical barrier of production and scientific research, especially seriously affects coal
The water damage prevention problem of the water in gob area of ore deposit safety in production.According to incompletely statistics, the pernicious water damage accident 90% of mine is above is old
Empty permeable initiation.Goaf is usually from bottom to top divided into caving zone, fissure zone and the bending part of subsiding belt three, is emitted
Fall more with gap between interior scattered coal petrography block, connective stronger, fissure zone has the water producing fractures connected with goaf but totality
Continuity is not damaged, and bending subsiding belt then keeps the water permeability of its original substantially.Its component of mine groundwater at the same time
Complexity, rich in K+、Na+、Mg2+、SO4 2-Etc. physical materials such as chemical substance and silts, it is during the motion constantly to coal
Rock mass carries out corrosion, makes original hole and crack propagation in rock stratum, and the germinating of water inrush accident and fissure zone, extends, passes through
It is logical etc. closely bound up.
At this stage, the research acted on for different quality coal and rock focuses mostly in drilling engineering field, and for gushing water
During different quality water to crack corrosion, influence that the research of crack propagation is less, while for the infiltration of three band of goaf
The research of feature is also rarely reported.Therefore research Percolation Law of the goaf three with interior water and different quality, different hydraulic pressure pair
The effect of coal and rock is particularly important.
The content of the invention
It is an object of the invention to provide it is a kind of simulate the pilot system that absorbs water with coal and rock diffusion of goaf three and
Method, with simulate goaf three absorb water with coal and rock diffusion and study different quality, the underground water of different hydraulic pressure is permeating
During effect to coal and rock.
The present invention provides a kind of pilot system simulated goaf three and absorbed water with coal and rock diffusion, including coal petrography examination
Part, infiltration experiment device, water supply installation, drill core device, water analysis outfit and image conversion device；Coal rock specimen includes being used for mould
Intend the bending complete moulded coal test specimen of subsiding belt, the test specimen of moulded coal containing crack for simulating fissure zone and for simulating caving zone
Dissipate coal test specimen；Infiltration experiment device includes cylinder body；Cylinder body include connected with water system inhalant region, for placing the coal petrography
Test specimen and the trial zone with visual window and the catchment that is connected with water quality analytical system；Water supply installation is used to carry to inhalant region
For different quality, the simulation water source of different hydraulic pressure；Drill core device includes being used to carry out core boring sampling to the test specimen of moulded coal containing crack
Sampler；Water analysis outfit is used to collecting and analyzing the water sample from catchment discharge；Image conversion device is used to pass through visual window
The extension in crack and developmental state in the record test specimen of moulded coal containing crack.
Further, inhalant region, trial zone and catchment are laterally set.
Further, infiltration experiment device further includes the gland for closed cylinder opening；It is provided with gland for sampling
The sample tap of device sampling.
Further, between inhalant region and trial zone and between trial zone and catchment by being arranged on inboard wall of cylinder block
Ring baffle separate；Sealing strip is provided between ring baffle and inboard wall of cylinder block.
Further, infiltration experiment device further includes sieve；The embeded slot coordinated with sieve is set on ring baffle.
Further, water supply installation includes the first water tank, water injecting pump and water meter；Between first water tank and water injecting pump,
Connected between water injecting pump and water meter and between water meter and the water inlet of inhalant region by pipeline.
Further, water analysis outfit includes the second water tank connected by the discharge outlet of pipeline and catchment, with
And for detecting the Water Test Kits of water sample in the second water tank.
Further, image conversion device includes being arranged on the high-speed camera in front of visual window and connects with high-speed camera
Connect and the computer of high definition capture card is installed.
The present invention also provides a kind of test method simulated goaf three and absorbed water with coal and rock diffusion, become using control
Amount method, research Percolation Law of the goaf three with coal and rock, water quality are to the action rule and hydraulic pressure of coal and rock to coal and rock
Action rule, comprises the following steps：
S1, prepares coal rock specimen, and coal rock specimen includes being used to simulate bending the complete moulded coal test specimen of subsiding belt, for simulating crack
The test specimen of moulded coal containing crack of band and the scattered coal test specimen for simulating caving zone；
S2, by simulation water source injection coal rock specimen；
S3, collects and analyzes the water sample from coal rock specimen outflow.
Further, if coal rock specimen is the test specimen of moulded coal containing crack in step S1, step S3 is further included：Record penetrates
The extension in crack and developmental state in journey moulded coal containing crack test specimen, and core boring sampling is carried out to the test specimen of moulded coal containing crack and is split with observing
The corrosion situation of gap.
Compared with prior art, advantage of the invention is that：
In the case where the water quality at simulation water source is identical with hydraulic pressure, by complete moulded coal test specimen, the test specimen of moulded coal containing crack and scattered coal
Test specimen is respectively put into trial zone, and simulation goaf three adds with coal and rock diffusion water absorption course, water supply installation to catchment
Water pressurizes, and makes the excessively above-mentioned three kinds of coal rock specimens of simulation water source stream, the water sample of outflow enters water analysis outfit by catchment
In, analysis water-like water quality, and the water quality with simulating water source contrasts, you can obtained by simulating in the certain situation of water quality and hydraulic pressure
Under, the Percolation Law of different coal rock specimens；A kind of coal rock specimen is selected, changes water quality or hydraulic pressure, then can study water quality to coal
Action rule of the action rule and hydraulic pressure of rock mass to coal and rock；When selecting the test specimen of moulded coal containing crack as research object,
Change water quality or hydraulic pressure, record the extension in crack and developmental state in the process of osmosis test specimen of moulded coal containing crack, and to type containing crack
Coal test specimen carries out core boring sampling with the corrosion situation of eye slit, is being oozed with the underground water simulated in different quality, different hydraulic pressure
Phenomena such as effect during stream to crack causes the crack initiation and extension in crack.In conclusion the present invention provides simulation goaf
Three pilot systems and method with the water suction of coal and rock diffusion, can simulate three band of goaf（Caving zone, fissure zone, bending
Sinking band）Coal and rock diffusion water absorption course, while can also simulate different quality, different hydraulic pressure underground water in seepage flow
During effect to crack phenomena such as causing the crack initiation and extension in crack.This system can consider goaf " three bands " seepage flow
The various factors of feature, easy to study the relation between water quality, hydraulic pressure and particle diameter, fracture water flow.
Brief description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing, wherein：
Fig. 1 is that the structure for the pilot system that simulation goaf three provided in an embodiment of the present invention absorbs water with coal and rock diffusion is shown
It is intended to.
Label：1- cylinder bodies；I- inhalant regions；II- trial zones；III- catchments；2- visual windows；3- samplers；4- glands；5-
Sample tap；6- ring baffles；The first water tanks of 7-；8- water injecting pumps；9- water meters；10- water inlets；11- discharge outlet；12- second is stored up
Water pot.
Embodiment
Embodiment 1
The present embodiment provides a kind of pilot system simulated goaf three and absorbed water with coal and rock diffusion, as shown in Figure 1, including
Coal rock specimen, infiltration experiment device, water supply installation, drill core device, water analysis outfit and image conversion device；Coal rock specimen includes
For simulating the complete moulded coal test specimen for bending subsiding belt, the test specimen of moulded coal containing crack for simulating fissure zone and being emitted for simulating
Fall the scattered coal test specimen of band；Infiltration experiment device includes cylinder body 1；Cylinder body 1 include connected with water system inhalant region I, for putting
Put coal rock specimen and there is the trial zone II of the visual window 2 and catchment III connected with water quality analytical system；Water supply installation is used
In the simulation water source that different quality, different hydraulic pressure are provided to inhalant region I, component and the mine groundwater composition class at the simulation water source
Seemingly, including K+、Na+、Mg2+、SO4 2-Etc. physical materials such as chemical substance and silts；Drill core device includes being used for type containing crack
Coal test specimen carries out the sampler 3 of core boring sampling；Water analysis outfit is used to collecting and analyzing the water sample from catchment discharge；Image
Makeup is put for recording the extension in crack and developmental state in the test specimen of moulded coal containing crack through visual window 2.
Wherein, complete moulded coal test specimen is the moulded coal without crack, and the test specimen of moulded coal containing crack is containing fissare moulded coal, is all
Sample is dissipated by the coal petrography of certain particle diameter it is placed in mould pressurization and is made；Coal petrography is directly dissipated sample and is placed in trial zone II by scattered coal test specimen
It is interior.Subsiding belt is bent based on the flexural deformation of coal and rock, the basic water permeability for keeping its original, therefore use complete moulded coal to try
Part is simulated.Fissure zone has the water producing fractures connected with goaf but overall continuity is not damaged, therefore uses moulded coal containing crack
Test specimen is simulated.Gap is more between dissipating coal petrography block in caving zone, connective stronger, therefore uses and dissipate the simulation of coal test specimen.
Crack in fissure zone has a different forms, thus in the present embodiment in the test specimen of moulded coal containing crack crack combination shape
State includes：Single crack（Comprise only a crack）, parallel crack（Contain a plurality of crack being parallel to each other）, junction crack
（I.e. a plurality of crack is intersected or the extended line in a plurality of crack intersects）.
Further, inhalant region I, trial zone II and catchment III are laterally set, to ensure the infiltration direction of water as horizontal stroke
To influence of the reduction gravity to permeating and spreading.
Further, as shown in Figure 1, infiltration experiment device further includes the gland 4 being open for closed cylinder 1；On gland 4
It is provided with the sample tap 5 sampled for sampler 3.
Further, as shown in Figure 1, leading between inhalant region I and trial zone II and between trial zone II and catchment III
The ring baffle 6 being arranged on 1 inner wall of cylinder body is crossed to separate；Sealing strip is provided between 1 inner wall of ring baffle 6 and cylinder body.
Further, infiltration experiment device further includes sieve；The embeded slot coordinated with sieve is set on ring baffle 6.
Using during scattered coal test specimen, it is necessary to sieve is embedded in two ring baffles 6, then coal petrography being dissipated sample and is paved with trial zone II.
The shape size of cylinder body 1 can be designed according to requirement of experiment situation, and the shape size of coal rock specimen is with trial zone II's
Shape size is adapted.As shown in Figure 1, the present embodiment provides a kind of cylinder body 1 of rectangular parallelepiped structure, length, width and height are respectively 900mm
The mm of × 310mm × 305,1 thickness of cylinder body is uniform, is 5mm.Cylinder body 1 is followed successively by inhalant region I, trial zone II and row along its length
Pool III.For ring baffle 6 to 30mm, thickness 20mm is protruded inside cylinder body 1, sealing strip is rubber weather strip, and towards experiment
Area II is set.The distance between two ring baffles 6 are 300mm, therefore the pros that coal rock specimen is 300mm × 300mm × 300mm
Body.Gland 4 is bolted on cylinder body 1, and the position of corresponding trial zone II is provided with three sample taps 5.
Further, as shown in Figure 1, water supply installation includes the first water tank 7, water injecting pump 8 and water meter 9；First water tank 7
Connected between water injecting pump 8, between water injecting pump 8 and water meter 9 and between water meter 9 and the water inlet 10 of inhalant region I by pipeline
Connect.Glass water tank of first water tank 7 preferably with scale.
Further, as shown in Figure 1, water analysis outfit includes being connected with the discharge outlet 11 of catchment III by pipeline
The second water tank 12, and for detect the second water tank 12 in water sample Water Test Kits.Second water tank 12
Further, image conversion device include be arranged on the high-speed camera in front of visual window and be connected with high-speed camera and
The computer of high definition capture card is installed.High-speed camera is placed in the front of visual window 2, observes and records and is split in the sample of moulded coal containing crack
The extension of gap and developmental state, by computer for analysis, be in coal and rock crack with the extension of water seepage flow and the research of law of development
Foundation is provided.
Embodiment 2
The present embodiment provides a kind of test method simulated goaf three and absorbed water with coal and rock diffusion, using control variable
Method, the work of research Percolation Law of the goaf three with coal and rock, water quality to the action rule of coal and rock and hydraulic pressure to coal and rock
With rule, comprise the following steps：
S1, prepares coal rock specimen, and coal rock specimen includes being used to simulate bending the complete moulded coal test specimen of subsiding belt, for simulating crack
The test specimen of moulded coal containing crack of band and the scattered coal test specimen for simulating caving zone；
S2, by simulation water source injection coal rock specimen；
S3, collects and analyzes the water sample from coal rock specimen outflow.
Further, if coal rock specimen is the test specimen of moulded coal containing crack in step S1, step S3 is further included：Record penetrates
The extension in crack and developmental state in journey moulded coal containing crack test specimen, and core boring sampling is carried out to the test specimen of moulded coal containing crack and is split with observing
The corrosion situation of gap.
Embodiment 3
What the test method that the pilot system and embodiment 2 that the present embodiment is provided based on embodiment 1 provide was implemented, study not
With Percolation Law of the goaf three with coal and rock under hydraulic pressure and condition of water quality, following step is specifically included：
（1）Transport the coal petrography sample sealing for the collection that drills back laboratory in time, the sample sifter of collection is divided into by 10 μ by sub-sieve
M-100 μm, 100 μm of -1mm, the coal petrography of 1mm-1cm, 1cm-10cm and 0.2-0.25mm particle diameter dissipate sample.Particle diameter is taken in 0.2-
0.25mm coal petrographys dissipate sample and are put into mould, add water, on 200 t rigidity matchings using the pressure of 100 MPa be made size as
The complete moulded coal test specimen and the test specimen of moulded coal containing crack of 300mm × 300mm × 300mm, wherein, the test specimen of moulded coal containing crack is respectively containing single
One crack, parallel crack and junction crack, separately take part coal petrography to dissipate sample as scattered coal test specimen, and small to all test specimen drying 24
When；
（2）40L water is added in first water tank 7, adds K+、Na+、Mg2+、SO4 2-Ionic compound, makes its concentration 100mg/L,
Xiang Shuizhong adds 10g silts, to simulate mine groundwater；Complete moulded coal test specimen is placed in trial zone II, passes through water injecting pump 8
Water source in first water tank 7 is injected with the constant pressure of 1MPa to the inhalant region I in cylinder body 1 by water inlet 10, has been started
Integer coal test specimen diffusion water absorption test；It is 25 DEG C to control room temperature, after permeability test continues 3d, opens discharge outlet 11, the row for the treatment of
Water is all flowed into after the second water tank 12 in the III of pool, records 12 water of the second water tank, and analyze by Water Test Kits
Variation of water；
（3）Complete moulded coal test specimen is taken out, is put into the test specimen of moulded coal containing crack and scattered coal test specimen, repeat step（2）；
（4）It is 1250 by mesh number wherein when dissipate the permeability test of coal test specimen（Mesh size is 10 μm）Sieve insertion
In two groups of ring baffles 6,10 μm -100 μm of coal petrography is dissipated into sample and is put into cylinder body region II, is paved with region II；
（5）Wherein when carrying out the permeability test of the test specimen of moulded coal containing crack, by sample tap 5, test specimen is carried out using sampler 3
Core boring sampling, the corrosion situation in observation test specimen crack, for different quality during analysis gushing water water to crack corrosion
Research provides foundation；High-speed camera is opened at the same time, observes and records the extension in crack and developmental state in the sample of moulded coal containing crack, is passed through
Computer for analysis is crossed, foundation is provided with the extension of water seepage flow and the research of law of development for crack in coal and rock.
Above-mentioned experiment is constant by hydraulic pressure, changes the first water tank 7 intermediate ion concentration to 10 mg/L, 50 mg/L with passing through
Water injecting pump 8 by the water source in the first water tank 7 with 2MPa, 3 MPa constant pressure by water inlet 10 inject in cylinder body 1 into
Pool I, can obtain different hydraulic pressure and be tried with Percolation Law of the goaf three with coal and rock under condition of water quality and moulded coal containing crack
The extension in crack and developmental state in part.
Above-mentioned experiment by the sample that core boring sampling obtains is analyzed and Water Test Kits analyze change of water quality
Situation, can obtain test specimen with simulating the water lithofacies interaction rule of water source intermediate ion and impurity, for water to goaf three with coal petrography
The affecting laws of body physics, chemistry and mechanical property provide foundation.
In conclusion pilot system and method that simulation goaf three provided by the invention absorbs water with coal and rock diffusion
Compared with the conventional method, spread by the horizontal infiltration of water, exclude influence of the gravity to permeating and spreading.Tried by complete moulded coal
Part, the test specimen of moulded coal containing crack, different-grain diameter dissipate the flow event that three band of goaf is effectively simulated in the water absorption test of coal diffusion, together
Shi Youxiao simulates the influence factors such as water quality in flow event, hydraulic pressure.
It these are only the embodiment of the present invention, be not intended to limit the scope of the invention, it is every to be said using the present invention
The equivalent structure or equivalent flow shift that bright book content is made, is directly or indirectly used in other relevant technical fields,
Similarly it is included within the scope of the present invention.
Claims (10)
- A kind of 1. pilot system simulated goaf three and absorbed water with coal and rock diffusion, it is characterised in that：Including coal rock specimen, Infiltration experiment device, water supply installation, drill core device, water analysis outfit and image conversion device；The coal rock specimen includes being used for complete moulded coal test specimen, the type containing crack for simulating fissure zone for simulating bending subsiding belt Coal test specimen and the scattered coal test specimen for simulating caving zone；The infiltration experiment device includes cylinder body（1）；The cylinder body（1）Including the inhalant region connected with the water system（I）, for placing the coal rock specimen and with can Form（2）Trial zone（II）And the catchment connected with the water quality analytical system（III）；The water supply installation is used for the inhalant region（I）Different quality, the simulation water source of different hydraulic pressure are provided；The drill core device includes being used for the sampler that core boring sampling is carried out to the test specimen of moulded coal containing crack（3）；The water analysis outfit is used to collect and analyze from the catchment（III）The water sample of discharge；Described image makeup is put for passing through the visual window（2）The extension in crack and hair in the record test specimen of moulded coal containing crack Educate situation.
- 2. the pilot system that simulation goaf three according to claim 1 absorbs water with coal and rock diffusion, its feature exist In the inhalant region（I）, trial zone（II）And catchment（III）Laterally set.
- 3. the pilot system that simulation goaf three according to claim 1 absorbs water with coal and rock diffusion, its feature exist In the infiltration experiment device is further included for closing the cylinder body（1）The gland of opening（4）；The gland（4）On be provided with for the sampler（3）The sample tap of sampling（5）.
- 4. the pilot system that simulation goaf three according to claim 1 absorbs water with coal and rock diffusion, its feature exist In the inhalant region（I）And trial zone（II）Between and the trial zone（II）With catchment（II）Between by being arranged on Cylinder body（1）Ring baffle on inner wall（6）Separate；The ring baffle（6）With the cylinder body（1）Sealing strip is provided between inner wall.
- 5. the pilot system that simulation goaf three according to claim 4 absorbs water with coal and rock diffusion, its feature exist In the infiltration experiment device further includes sieve；The ring baffle（6）The embeded slot that upper setting coordinates with the sieve.
- 6. the pilot system that simulation goaf three according to claim 1 absorbs water with coal and rock diffusion, its feature exist In the water supply installation includes the first water tank（7）, water injecting pump（8）And water meter（9）；First water tank（7）And water injecting pump（8）Between, water injecting pump（8）With water meter（9）Between and water meter（9）With water inlet Area（I）Water inlet（10）Between connected by pipeline.
- 7. the pilot system that simulation goaf three according to claim 1 absorbs water with coal and rock diffusion, its feature exist In the water analysis outfit is included by pipeline and the catchment（II）Discharge outlet（11）Second water tank of connection （12）, and for detecting second water tank（12）The Water Test Kits of middle water sample.
- 8. the pilot system that simulation goaf three according to claim 1 absorbs water with coal and rock diffusion, its feature exist In described image makeup is put the high-speed camera including being arranged in front of the visual window and is connected with the high-speed camera And the computer of high definition capture card is installed.
- 9. a kind of test method simulated goaf three and absorbed water with coal and rock diffusion, it is characterised in that using control variable Method, the work of research Percolation Law of the goaf three with coal and rock, water quality to the action rule of coal and rock and hydraulic pressure to coal and rock With rule, comprise the following steps：S1, prepares coal rock specimen, and the coal rock specimen includes being used to simulate bending the complete moulded coal test specimen of subsiding belt, for simulating The test specimen of moulded coal containing crack of fissure zone and the scattered coal test specimen for simulating caving zone；S2, injects the coal rock specimen by simulation water source；S3, collects and analyzes the water sample from coal rock specimen outflow.
- 10. the test method that simulation goaf three according to claim 9 absorbs water with coal and rock diffusion, its feature exist In if coal rock specimen described in step S1 is the test specimen of moulded coal containing crack, step S3 is further included：Contain described in record process of osmosis and split The extension in crack and developmental state in gap moulded coal test specimen, and core boring sampling is carried out with eye slit to the test specimen of moulded coal containing crack Corrosion situation.
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| CN201711081203.8A CN107957382B (en) | 2017-11-07 | 2017-11-07 | Test system and method for simulating permeation diffusion water absorption of three-zone coal rock mass in goaf |
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| CN201711081203.8A CN107957382B (en) | 2017-11-07 | 2017-11-07 | Test system and method for simulating permeation diffusion water absorption of three-zone coal rock mass in goaf |
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