CN108955989A - For determining the test device and test method of water filling cracks in coal seam internal water pressure - Google Patents
For determining the test device and test method of water filling cracks in coal seam internal water pressure Download PDFInfo
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- CN108955989A CN108955989A CN201810498213.XA CN201810498213A CN108955989A CN 108955989 A CN108955989 A CN 108955989A CN 201810498213 A CN201810498213 A CN 201810498213A CN 108955989 A CN108955989 A CN 108955989A
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- water
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- water pressure
- coal seam
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
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- General Physics & Mathematics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Examining Or Testing Airtightness (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of for determining the test device and test method of water filling cracks in coal seam internal water pressure, belongs to pore water pressure the field of test technology.The technical issues of being unable to test which solve water pressure in water injecting drilling surrounding medium in the prior art.It includes mechanism for testing and indication mechanism, and the inlet opening of several different pore sizes is provided on shell, and cylindrical empty inside the housing is intracavitary to be provided with several partitions, and cavity is divided into several seal chambers by several partitions.The present invention matches the aperture for obtaining inlet opening by mechanism for testing with indication mechanism, using the aperture as intermediate quantity, the water pressure in coal-bed flooding drilling surrounding medium fissured structure is calculated according to the capillary aperture in washburn equation and the relationship between water pressure, to accurately quantitatively be calculated the water pressure inside the surrounding medium that drills during coal-bed flooding, its calculated result improves coal-bed flooding Integrate Natural Disasters Prevention effect and plays an important role for adjusting Coal Seam Infusion Parameter.
Description
Technical field
The present invention relates to pore water pressure the field of test technology, and in particular to one kind is for determining around coal-bed flooding drilling
The test device and test method of water pressure in coalmass crevasse structure.
Background technique
Coal-bed flooding is the mine disaster integrated control technique that generally uses in the world at present, undergo the practice of decades with
Development, up to the present, China have the fully-mechanized mining working close to 80% using coal-bed flooding technology.In recent years, with this
One technology and technique are constantly progressive, and the application field of coal-bed flooding technology is also constantly expanding, and subtract dirt, prevention and treatment punching from beginning
It presses with hitting, the disasters such as coal and gas prominent, to toxic gases such as the hydrogen sulfide for being currently advancing to eliminate in coal seam, simultaneously also
It is widely used in the softening fields such as tight roof and top coal caving.In coal-bed flooding measure implementation process, different gas
Preservation, coal body hardness, pore structure, wetting characteristics, in coal seam the occurrence status of water change with water injection pressure it is totally different, therefore in time
Water injection pressure during adjustment coal-bed flooding is played an important role for improving coal-bed flooding effect of taking precautions against natural calamities, and can be accurate
The water pressure that ground obtains inside water filling cracks in coal seam then becomes the precondition of adjustment water injection pressure.
The method of Fluid pressure in water injecting drilling surrounding medium is measured in the prior art are as follows: construction drill-laying pressure-measuring pipe
Pressure gauge-reading is installed in road-sealing of hole-aperture, and the pressure that pressure gauge is shown in this method is the comprehensive pressure of gas and water two-phase,
And the pressure of water can not Accurate Determining.
Summary of the invention
In order to solve above-mentioned defect existing in the prior art, the invention proposes one kind for determining water filling cracks in coal seam
The test device and test method of internal water pressure can obtain the aperture of part of detecting inlet opening by field test, with
The aperture can calculate coal output layer according to the capillary aperture in washburn equation and the relationship between water pressure for intermediate quantity
Water pressure in water injecting drilling surrounding medium fissured structure.
One of task of the invention be to provide it is a kind of for determining the test device of water filling cracks in coal seam internal water pressure,
Its technical solution includes:
A kind of test device for determining water filling cracks in coal seam internal water pressure comprising mechanism for testing and display machine
Structure, the mechanism for testing include shell, water filtration membrane, permeable steel mesh, water swelling rubber, positive electric contact, cathode electric contact
And explosion-proof electrical source, the shell are cylinder, the inlet opening of several different pore sizes are provided on the housing, described
The cylindrical empty of interior of shell is intracavitary to be provided with several partitions, and the cylindrical cavity is divided into several by several partitions
Seal chamber is provided with a water proof rubber tube in the center point of the cylindrical cavity, is used to put in the water proof rubber tube
Set the route connecting with the explosion-proof electrical source；
The water swelling rubber is correspondingly placed in the seal chamber, between the water swelling rubber and shell
The permeable steel mesh and water filtration membrane are set gradually, the water filtration membrane is for the impurity contained in water to be isolated, when described
When water swelling rubber water suction carries out expansion reaction, the permeable steel mesh to absorb water for protecting the water filtration membrane
Expanded rubber is moved to side；
The indication mechanism includes external wire, indicator light and switch, the external wire and the explosion-proof electrical source
The connection of connection；
The water swelling rubber is internally provided with conducting wire, and one end is provided with positive terminal, the water swelling
Also there are certain expansion spaces between rubber and the seal chamber, and the anti-explosion electric is arranged in the expansion space adjacent
Source, the anode connector are located at the explosion-proof electrical source, described when the water swelling rubber, which absorbs water, carries out expansion reaction
Positive terminal is connected with anode connector, makes to form circuit closed circuit between explosion-proof electrical source and indication mechanism at this time, and pass through
The indicator light of indication mechanism is shown.
As a preferred solution of the present invention, it is intracavitary to be welded on the cylindrical empty for the partition.
As another preferred embodiment of the invention, the water filtration membrane is RO film.
Another task of the invention be to provide it is a kind of for determining the test method of water filling cracks in coal seam internal water pressure,
It uses above-mentioned test device, the test method the following steps are included:
A designs seal chamber number and corresponding inlet opening size according to coal-bed flooding operation scheme, and is processed, thereafter
After to coal-bed flooding drilling construction, several water pressure instrument connections of constructing around water injecting drilling；
B, before carrying out coal-bed flooding operation, mechanism for testing is connected with indication mechanism, determines each seal chamber and instruction
The order of connection of lamp, and circuit reliability is verified, after the completion of to be verified, mechanism for testing is pushed into testing bore holes bottom, and carry out
Sealing of hole operation；
C, after coal-bed flooding operation starts, the inlet opening of different pore size represents various sizes of capillary, by being arranged not
With the inlet opening in aperture, so that can to enter low pressure seal by macropore intracavitary for low pressure water, high pressure water is made to enter height by aperture
Means of press seals is intracavitary；The indicator light for observing indication mechanism, after a certain indicator light is bright, after measuring relevant parameter, according to formula (1) institute
The washburn equation shown calculates water pressure using seal chamber inlet opening size；
In formula (1), PcThe corresponding capillary pressure of aperture r；The surface tension and contact angle of σ, θ-liquid；
D, after the completion of water pressure calculation, according to calculated result, water injection parameter is adjusted in time；
E, after the completion of water pressure test, indication mechanism is recycled, to be recycled.
Advantageous effects brought by the present invention are as follows:
The present invention after water pressure reaches certain numerical value using, there are when gas and water two-phase, can overcoming gas in cracks in coal seam
Body pressure and capillary resistance enter this principle of smaller capillary pipe structure, devise a kind of hydraulic pressure force test device, work as coal
There are when air water two-phase in layer crack, the pressure of only water can overcome gas pressure to enter smaller hair after reaching a certain level
In capillary structure, therefore inlet opening outside the different pore size for representing different size capillaries is provided on mechanism for testing shell,
So that low pressure water can enter test device internal low-voltage seal chamber by macropore, high pressure water is made to enter high pressure by lesser hole
In seal chamber；Simultaneously because the characteristic that R.O film only allows hydrone to pass through, can by impurities such as silts in water outside, to
After water enters a certain seal chamber, water swelling rubber can expand reaction under the action of water, due to being provided with outside it
One layer of permeable steel mesh causes the water swelling rubber in the seal chamber that can only be moved to device side, moves to one to it
After determining degree, the power positive cathode electric contact in the seal chamber is connected, and internal explosion-proof electrical source and external indication mechanism is made to form electricity
Closed circuit is flowed, so that the indicator light for corresponding to the seal chamber on external indication mechanism be made to brighten.Thereafter according to washburn equation
In capillary aperture and water pressure between relationship, can calculate coal-bed flooding drilling surrounding medium fissured structure in hydraulic pressure
Power.
The use of apparatus of the present invention can carry out the water pressure inside the surrounding medium that drills during coal-bed flooding accurate
Ground quantitatively calculates, and calculated result improves coal-bed flooding Integrate Natural Disasters Prevention effect with important for adjusting Coal Seam Infusion Parameter
Effect.
Detailed description of the invention
The present invention will be further described with reference to the accompanying drawing:
Fig. 1 is the structural schematic diagram of mechanism for testing in the present invention；
Fig. 2 is the diagrammatic cross-section of mechanism for testing in the present invention；
Fig. 3 is the structural schematic diagram of indication mechanism in the present invention；
In figure, 1- shell, the larger inlet opening 2-, 3-R.O water filtration membrane, the permeable steel mesh of 4-, 5- water swelling rubber, 6- anode
Electric contact, 7- cathode electric contact, the smaller inlet opening 8-, 9- conducting wire, 10- seal chamber, 11- explosion-proof electrical source, 12- power source cavity, 13- every
Water rubber tube, 14- partition, 15- indicator light, 16- external wire, 17- switch.
Specific embodiment
The invention proposes a kind of for determining the test device and test method of water filling cracks in coal seam internal water pressure, is
Keep advantages of the present invention, technical solution clearer, clear, elaborates combined with specific embodiments below to the present invention.
It is a kind of for determining the test device of water filling cracks in coal seam internal water pressure, including survey in conjunction with shown in Fig. 1 to Fig. 3
Test-run a machine structure and indication mechanism, mechanism for testing include shell 1, larger inlet opening 2, R.O water filtration membrane 3, permeable steel mesh 4, water swelling
Rubber 5, positive electric contact 6, cathode electric contact 7, smaller inlet opening 8, conducting wire 9, seal chamber 10, explosion-proof electrical source 11, power source cavity 12,
Water proof rubber tube 13 and partition 14,1 shape of shell are cylinder, the inlet opening of several different pore sizes are arranged on the shell, i.e.,
Larger inlet opening 2 and smaller inlet opening 8, intracavitary several partitions 14 of setting of cylindrical empty inside the housing, several partitions
Cylindrical cavity is divided into several seal chambers 10 by 14, and a water proof rubber tube 13 is arranged in the center point of cylindrical cavity, every
For placing the route connecting with explosion-proof electrical source in water rubber tube.
Indication mechanism includes indicator light 15, external wire 16 and switch 17, and indicator light 15 is provided with multiple, and when test is distinguished
It is correspondingly connected with different seal chambers.
Above-mentioned shell 1 is made of high tensile steel tube, and the inlet opening of several different pore sizes represents different size capillaries,
When, there are when air water two-phase, the pressure of only water can overcome gas pressure entrance smaller after reaching a certain level in cracks in coal seam
Capillary pipe structure in, therefore low pressure water can by larger inlet opening 2 enter low pressure seal chamber, make high pressure water by it is smaller into
Water hole 8 is intracavitary into high pressure sealing, and seal chamber is isolated by partition 14 in the intracavitary welding of cylindrical empty, in seal chamber outer portion
Not She Zhi R.O water filtration membrane 3 and permeable steel mesh 4, R.O water filtration membrane only allows hydrone to pass through, can by the impurity such as silt in water every
From outside, permeable steel mesh has some strength, R.O film can be protected when water swelling rubber carries out expansion reaction and prevent from hindering
Water hole is filled in, and guarantees that the water swelling rubber 5 in seal chamber can only be moved to device side, water swelling rubber has
High resiliency and preferable mechanical strength are set inside water swelling rubber so that rubber may expand several times to hundred times after absorbing water
Conducting wire is set, one end is provided with positive pole connector, and after water swelling rubber and water react, the power supply in seal chamber is positive and negative
Pole electric contact is connected, and so that internal explosion-proof electrical source and external indication mechanism is formed circuit closed circuit, to make external indication mechanism
The indicator light of the upper correspondence seal chamber brightens.
It, can be with according to the capillary aperture in washburn equation and the relationship between water pressure after a certain indicator light is bright
Calculate the water pressure in coal-bed flooding drilling surrounding medium fissured structure.
A kind of test method for determining water filling cracks in coal seam internal water pressure, uses above-mentioned test device, wraps
Include following steps:
A designs seal chamber number and corresponding inlet opening size according to coal-bed flooding operation scheme, and is processed, thereafter
After to coal-bed flooding drilling construction, several water pressure instrument connections of constructing around water injecting drilling；
B, before carrying out coal-bed flooding operation, mechanism for testing is connected with indication mechanism, determines each seal chamber and instruction
The order of connection of lamp, and circuit reliability is verified, after the completion of to be verified, mechanism for testing is pushed into testing bore holes bottom using drilling rod
Portion, and carry out sealing of hole operation；
C, after coal-bed flooding operation starts, the inlet opening of different pore size represents various sizes of capillary, by being arranged not
With the inlet opening in aperture so that can to enter low pressure seal by large hole intracavitary for low pressure water, make high pressure water by smaller hole into
It is intracavitary to enter high pressure sealing；The indicator light for observing indication mechanism, after a certain indicator light is bright, after measuring relevant parameter, according to formula
(1) washburn equation shown in calculates water pressure using seal chamber inlet opening size；
In formula (1), PcThe corresponding capillary pressure of aperture r；The surface tension and contact angle of σ, θ-liquid；
D, after the completion of water pressure calculation, according to calculated result, water injection parameter is adjusted in time；Such as when test water pressure mistake
Hour, it should increase water injection pressure etc. in time；
E, after the completion of water pressure test, indication mechanism is recycled, to be recycled.
The part that do not address in the present invention uses or uses for reference prior art and can be realized.
Although more herein used the terms such as R.O water filtration membrane 3, permeable steel mesh 4, water swelling rubber 5,
It does not exclude the possibility of using other terms.It is of the invention the use of these items is only for being more convenient to describe and explain
Essence；Being construed as any additional limitation is disagreed with spirit of that invention.
It should be further noted that specific embodiment described herein is only to made by spirit of the invention
It illustrates.Those skilled in the art can make various modifications to described specific embodiment
Or supplement or be substituted in a similar manner, however, it does not deviate from the spirit of the invention or surmounts the appended claims determines
The range of justice.
Claims (4)
1. a kind of for determining the test device of water filling cracks in coal seam internal water pressure comprising mechanism for testing and indication mechanism,
It is characterized by: the mechanism for testing includes shell, water filtration membrane, permeable steel mesh, water swelling rubber, positive electric contact, bears
Pole electric contact and explosion-proof electrical source, the shell are cylinder, are provided with the water inlet of several different pore sizes on the housing
Hole is provided with several partitions the cylindrical empty of the interior of shell is intracavitary, several partitions are by the cylindrical cavity point
Several seal chambers are segmented into, the center point of the cylindrical cavity is provided with a water proof rubber tube, the water proof rubber
For placing the route connecting with the explosion-proof electrical source in pipe；
The water swelling rubber is correspondingly placed in the seal chamber, between the water swelling rubber and shell successively
The permeable steel mesh and water filtration membrane are set, and the water filtration membrane is for the impurity contained in water to be isolated, when the water suction
When expanded rubber water suction carries out expansion reaction, the permeable steel mesh makes water swelling for protecting the water filtration membrane
Rubber is moved to side；
The indication mechanism includes external wire, indicator light and switch, and the external wire is connect with the explosion-proof electrical source
Connection；
The water swelling rubber is internally provided with conducting wire, and one end is provided with positive terminal, the water swelling rubber
Also there are certain expansion spaces between the seal chamber, and the explosion-proof electrical source is arranged in the expansion space adjacent,
The anode connector is located at the explosion-proof electrical source, when the water swelling rubber absorb water carry out expansion reaction when, it is described just
Pole connector is connected with anode connector, makes to form circuit closed circuit between explosion-proof electrical source and indication mechanism at this time, and by aobvious
Show that the indicator light of mechanism is shown.
2. according to claim 1 a kind of for determining the test device of water filling cracks in coal seam internal water pressure, feature
Be: it is intracavitary that the partition is welded on the cylindrical empty.
3. according to claim 1 a kind of for determining the test device of water filling cracks in coal seam internal water pressure, feature
Be: the water filtration membrane is RO film.
4. a kind of for determining the test method of water filling cracks in coal seam internal water pressure, which is characterized in that it uses claim 1
Described is a kind of for determining the test device of water filling cracks in coal seam internal water pressure, and the test method includes following step
It is rapid:
A designs seal chamber number and corresponding inlet opening size according to coal-bed flooding operation scheme, and is processed, thereafter to coal
After layer water injecting drilling construction, several water pressure instrument connections of constructing around water injecting drilling；
B, before carrying out coal-bed flooding operation, mechanism for testing is connected with indication mechanism, determines each seal chamber and indicator light
The order of connection, and circuit reliability is verified, after the completion of to be verified, mechanism for testing is pushed into testing bore holes bottom, and carry out sealing of hole
Operation；
C, after coal-bed flooding operation starts, the inlet opening of different pore size represents various sizes of capillary, by the way that different holes are arranged
The inlet opening of diameter makes high pressure water enter high densification by aperture so that can to enter low pressure seal by macropore intracavitary for low pressure water
It seals intracavitary；The indicator light for observing indication mechanism, after a certain indicator light is bright, after measuring relevant parameter, according to shown in formula (1)
Washburn equation calculates water pressure using seal chamber inlet opening size；
In formula (1), PcThe corresponding capillary pressure of aperture r；The surface tension and contact angle of σ, θ-liquid；
D, after the completion of water pressure calculation, according to calculated result, water injection parameter is adjusted in time；
E, after the completion of water pressure test, indication mechanism is recycled, to be recycled.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498213.XA CN108955989B (en) | 2018-05-23 | 2018-05-23 | For determining the test device and test method of water filling cracks in coal seam internal water pressure |
| PCT/CN2018/125191 WO2019223316A1 (en) | 2018-05-23 | 2018-12-29 | Testing device used for determining water pressure in fracture of water injected coal seam and testing method |
| AU2018424685A AU2018424685B2 (en) | 2018-05-23 | 2018-12-29 | Testing device used for determining water pressure in fracture of water injected coal seam and testing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810498213.XA CN108955989B (en) | 2018-05-23 | 2018-05-23 | For determining the test device and test method of water filling cracks in coal seam internal water pressure |
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| Publication Number | Publication Date |
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| CN108955989A true CN108955989A (en) | 2018-12-07 |
| CN108955989B CN108955989B (en) | 2019-07-05 |
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| CN201810498213.XA Active CN108955989B (en) | 2018-05-23 | 2018-05-23 | For determining the test device and test method of water filling cracks in coal seam internal water pressure |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN108955989B (en) |
| AU (1) | AU2018424685B2 (en) |
| WO (1) | WO2019223316A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019223316A1 (en) * | 2018-05-23 | 2019-11-28 | 山东科技大学 | Testing device used for determining water pressure in fracture of water injected coal seam and testing method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111963155B (en) * | 2020-08-19 | 2023-12-08 | 山东科技大学 | Coal seam water injection wetting range detection device, detection method and homogenization method |
| CN113155200B (en) * | 2021-05-16 | 2022-09-23 | 天地科技股份有限公司 | Coal mine underground reservoir coal pillar dam body damage and damage determination device and method |
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Also Published As
| Publication number | Publication date |
|---|---|
| AU2018424685A1 (en) | 2021-01-21 |
| CN108955989B (en) | 2019-07-05 |
| WO2019223316A1 (en) | 2019-11-28 |
| AU2018424685B2 (en) | 2021-09-30 |
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