CN109142193A - A kind of permeability of coal sample shock wave test device and method - Google Patents
A kind of permeability of coal sample shock wave test device and method Download PDFInfo
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- CN109142193A CN109142193A CN201811295774.6A CN201811295774A CN109142193A CN 109142193 A CN109142193 A CN 109142193A CN 201811295774 A CN201811295774 A CN 201811295774A CN 109142193 A CN109142193 A CN 109142193A
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- coal sample
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- permeability
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- 239000003245 coal Substances 0.000 title claims abstract description 88
- 230000035939 shock Effects 0.000 title claims abstract description 51
- 238000012360 testing method Methods 0.000 title claims abstract description 27
- 230000035699 permeability Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title abstract description 16
- 238000005086 pumping Methods 0.000 claims description 5
- 238000010998 test method Methods 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000000644 propagated effect Effects 0.000 claims description 3
- 230000001427 coherent effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000005030 aluminium foil Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006854 communication Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000011005 laboratory method Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 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
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (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
A kind of permeability of coal sample shock wave test device and method, suitable for coal production to permeability of coal sample can test.Device includes coal sample cylinder, the fixed cylinder that is nested；Coal sample cylinder is equipped with internal screw thread close to shock tube low pressure stage side and connect it with shock tube, and the other side is equipped with external screw thread and connect with the fixed cylinder that is nested；The fixed open end side that is nested is equipped with internal screw thread, rubber ring groove is equipped in open end, it is nested in cylinder and coal sample cylinder connection procedure fixed, coal sample is sent into coal sample cylinder using inner ring and will be connected and fixed, the fixed closed end side that is nested, for connecting acquisition equipment, is equipped with vacuum pump connecting hole above closed end equipped with gauge hole.The test to permeability of coal sample may be implemented using the present invention, improve the efficiency of permeance property test.
Description
Technical field
The present invention relates to a kind of permeability of coal sample shock wave test device and methods, belong to mine engineering field, especially suitable
The measurement strong and weak for permeability of coal sample energy in coal production.
Background technique
Coal is a kind of special porous media, unique internal pore structure and makes gas to the suction-operated of gas
Process of osmosis inside it is extremely complex.In the dynamic (dynamical) research of coal mine gas and underground coal mine dependence test, coal
Sample permeance property is the physical parameter for reflecting gas porous flow complexity in coal seam, and the permeance property for measuring coal seam is one important
Work.Currently, laboratory method is mostly used for the measurement of coal permeance property power, this method preparation process is complicated, surveys
Fixing time, long, consuming is big, it is desirable that experiment condition is harsh, and there are more difficulties for technical aspect.Therefore, it is necessary to set of system to take
It builds that simple, device is easy to operate, the device and method being measured to the permeability of coal sample can be completed in a short time.
Summary of the invention
The purpose of the present invention is being directed to existing coal permeability test method, a kind of coal sample infiltration is provided
Property shock wave test device and method, use is connect with shock wave pipe device using the device, shock wave pipe device, should for generating shock wave
Device is transmitted the signal before and after coal sample by acquisition shock wave, compared and analyzed, judge that coal sample is seeped for placing and fixing coal sample
The power of permeability.
Technical solution: permeability of coal sample shock wave test device of the invention, including coal sample cylinder 1, the fixed cylinder 2 that is nested.Wherein,
Coal sample cylinder 1 is made of stainless steel tube, long 120mm, outer diameter 70mm, and the change of three sections of different length sizes is equipped in caliber
Diameter, it is 50mm, wall thickness 10mm that side internal diameter is connect with 5 low pressure stage of shock tube, and is equipped with the internal screw thread of long 15mm, utilizes interior spiral shell
Coal sample cylinder 1 is connect by line with 5 low pressure stage of shock tube.It is 62mm that coal sample cylinder 1, which connect side internal diameter with the fixed cylinder 2 that is nested, and wall thickness is
Coal sample cylinder 1 is connect by 4mm, the external screw thread equipped with long 50mm using external screw thread with the fixed cylinder 2 that is nested.It is equipped in the middle part of coal sample cylinder 1
One section of long 50mm, internal diameter 52mm, wall thickness 9mm pipeline section is for placing coal sample 4.The fixed cylinder 2 that is nested is made of stainless steel tube, long
90mm, outer ring overall diameter are 80mm, and outer ring interior diameter is 70mm, and outer ring wall thickness is 5mm, and inner ring interior diameter is 50mm, internal ring wall
Thickness is 5mm.For the fixed 2 open end side inner ring of cylinder that is nested embedded with 6 groove of outer diameter 56mm, 3mm wide a rubber ring, groove is interior to place rubber
Cushion rubber 6, rubber ring 6 can make coal sample cylinder 1 and the fixed cylinder 2 that is nested play buffer function during the connection process, prevent damage test coal
Sample 4.The fixed 2 closed end side wall thickness of cylinder that is nested is 10mm, and is provided with the sensor connecting hole 3 of a diameter 35mm, for placing
Connecting device for sensor.It is equipped with a diameter 10mm vacuum pump connecting hole 7 right above the fixed 2 closed end side of cylinder that is nested, for connecting
Connect vacuum pump apparatus.
Use the permeability of coal sample shock wave test method of above-mentioned apparatus, comprising the following steps:
A, it is completed shock tube test device, tests shock wave pipe device air-tightness；
B, coal sample is put into coal sample cylinder, rubber ring is packed into fixation and is nested in an open end inner ring side groove, by coal
Sample cylinder is connected through a screw thread with the fixed cylinder that is nested, and coal sample feeding coal sample cylinder is slowly had internal screw thread one using the fixed cylinder that is nested of rotation
Side；
C, sensor device is connected, while vacuum pump being connect with aperture at the top of shock tube low pressure stage, the fixed cylinder that is nested, is beaten
Vacuum pump is opened, low pressure segment pipe and fixed be nested inside cylinder are evacuated；
D, vacuum pumping is completed, opening signal acquisition instrument, opens high pressure gas cylinder to shock tube high pressure section gas injection；
E, it after the diaphragm between shock tube high pressure section and low pressure stage destroys, generates shock wave and is propagated to low pressure stage, acquire shock wave
Coherent signal before and after through coal sample completes primary test.
Beneficial effects of the present invention: coal sample is packed into coal sample cylinder, and the fixed internal screw thread that is nested can be such that it connects with coal sample cylinder
Connect close, coal sample cylinder and fixation be nested in a screwing process, the inner ring of the fixed cylinder that is nested can slowly head on coal sample by its
It is sent into coal sample cylinder internal screw thread side, the fixed rubber ring for inner ring side that is nested can play buffer function during the connection process,
And it is not damaged to can protect coal sample.The fixed closed end side that is nested is set equipped with sensor interface convenient for connection signal acquisition
It is standby.The vacuum pump connecting hole being equipped at the top of the fixed cylinder that is nested carries out vacuum pumping for connecting vacuum pump, allow high pressure section with it is low
Pressure difference is formed between pressure section, the fixed cylinder that is nested is inside and outside to form pressure difference, so that shock wave is easier to penetrate coal sample arrival in communication process
Tail signal sensor.Apparatus of the present invention are built simply, easy to operate, and the permeability that can satisfy different length material sample is surveyed
Examination, improves the efficiency of test, has wide applicability.
Detailed description of the invention
Fig. 1 is coal sample cylinder sectional view；
Fig. 2 is coal sample cylinder side view；
Fig. 3 is the fixed sectional view that is nested；
Fig. 4 is the fixed side view that is nested；
Fig. 5 is schematic diagram before device is socketed；
Fig. 6 is schematic diagram after device socket；
Fig. 7 is testing permeability process schematic；
In figure: 1- coal sample cylinder, the fixed cylinder that is nested of 2-, 3- sensor connecting hole, 4- coal sample, 5- shock tube, 6- rubber ring, 7-
Vacuum pump connecting hole
Specific embodiment
Below in conjunction with drawings and examples, the invention will be further described:
Permeability of coal sample shock wave test device of the invention is made of coal sample cylinder 1, the fixed cylinder 2 that is nested.The coal sample cylinder
1, which connect side with 5 low pressure stage of shock tube, is threadedly coupled equipped with internal screw thread with shock tube 5, and the other side is equipped with external screw thread and fixing sleeve
Embedding cylinder 2 is threadedly coupled, and the fixation, which is nested outside 2 open side of cylinder, to be equipped with internal screw thread and be threadedly coupled with coal sample cylinder 1, in open side
6 groove of rubber ring is equipped with for placing rubber ring 6, one upper side of closed end, which is equipped with, is controlled to a vacuum pump hole 7, and tail portion, which is equipped with, to be passed
Sensor interface 3.
Permeability of coal sample shock wave test method of the invention, specific steps are as follows:
A, aluminium foil is put between 5 device high pressure section of shock tube and low pressure stage pipeline section first to cover low pressure stage nozzle entirely
High pressure section and low pressure stage are passed through flanged joint by lid；High pressure gas cylinder is connect with 5 high pressure section of shock tube, opens high pressure gas cylinder, is surveyed
Try the air-tightness of shock tube 5 device high pressure section and pipeline；
B, rubber ring 6 is packed at the fixed opening side outer annular recess of cylinder 2 that is nested in advance, coal sample 4 by the outer spiral shell of coal sample cylinder 1
Line side is put into coal sample cylinder 1, and slowly coal sample cylinder 1 is connect by the fixed cylinder 2 that is nested of rotation by screw thread with the fixed cylinder 2 that is nested, even
In termination process, fixed 2 inner ring of cylinder that is nested heads on coal sample 4 and is sent to 1 internal screw thread side of coal sample cylinder, and rubber ring 6 is in connection procedure
In play the role of buffering, prevent damage coal sample 4, since coal sample 4 can be fixed on by the barrier effect of 5 device low pressure stage of shock tube
In coal sample cylinder 1；
C, sensor device is connected, by vacuum pump and 5 low pressure stage top aperture of shock tube, the fixed 2 top aperture of cylinder that is nested
Vacuum pump is opened in connection, carries out vacuum pumping to low pressure stage pipeline and fixed be nested in cylinder 2, make 5 high pressure section of shock tube with it is low
Pressure difference is formed between pressure section, the fixed cylinder 2 that is nested is inside and outside to form pressure difference, so that shock propagation penetrates coal sample 4, is conducive to 4 rear portion of coal sample
Signal acquisition；
D, after the completion of vacuum pumping, vacuum pump is closed, opening signal acquisition device opens high pressure gas cylinder to shock tube 5
High pressure section gas injection pressurization；
E, it after waiting the aluminium foil between 5 high pressure section of shock tube and low pressure stage to destroy, generates shock wave and is propagated to low pressure stage, adopted
Collect shock wave by the signal data of 4 front and back of coal sample, completes primary test, analysis test data judges that the permeance property of coal sample 4 is strong
It is weak.
Claims (4)
1. a kind of permeability of coal sample shock wave test device, it is characterised in that: including putting the coal sample cylinder 1 of coal sample, for fixing coal sample
Fixation be nested cylinder 2.
2. permeability of coal sample shock wave test device according to claim 1, it is characterised in that: the fixation cylinder 2 that is nested is opened
6 groove of rubber ring is equipped in mouth end side, closed end side is equipped with sensor connecting hole 3.
3. permeability of coal sample shock wave test device according to claim 1, it is characterised in that: the fixation cylinder 2 that is nested closes
Mouth one lateral roof of end is equipped with vacuum pump connecting hole 7.
4. a kind of permeability of coal sample shock wave test method, it is characterised in that using the test dress of permeability of coal sample shock wave described in right 1
It sets and is used in combination with shock tube test device, concrete operation step are as follows:
A, it is completed 5 test device of shock tube, tests 5 device air-tightness of shock tube；
B, coal sample 4 is put into coal sample cylinder 1, rubber ring 6 is packed into the fixed 2 groove side of cylinder that is nested, by coal sample cylinder 1 and fixing sleeve
Embedding cylinder 2 is connected through a screw thread, and coal sample 4 is slowly sent into coal sample cylinder 1 by the fixed cylinder 2 that is nested of rotation internal screw thread side；
C, sensor device is connected, vacuum pump is connect with low pressure stage, fixed 2 aperture of cylinder that is nested, vacuum pumping is carried out, completes
After close vacuum pump；
D, opening signal acquisition instrument opens high pressure gas cylinder to 5 high pressure section gas injection of shock tube；
E, it after the diaphragm between 5 high pressure section of shock tube and low pressure stage destroys, generates shock wave and is propagated to low pressure stage, acquisition shock wave is logical
The coherent signal for crossing 4 front and back of coal sample completes primary test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811295774.6A CN109142193A (en) | 2018-11-01 | 2018-11-01 | A kind of permeability of coal sample shock wave test device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811295774.6A CN109142193A (en) | 2018-11-01 | 2018-11-01 | A kind of permeability of coal sample shock wave test device and method |
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| Publication Number | Publication Date |
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| CN109142193A true CN109142193A (en) | 2019-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811295774.6A Pending CN109142193A (en) | 2018-11-01 | 2018-11-01 | A kind of permeability of coal sample shock wave test device and method |
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| CN (1) | CN109142193A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061014A (en) * | 2014-07-07 | 2014-09-24 | 太原理工大学 | Coal seam anti-reflection experiment device based on high-voltage electric pulse |
| CN107869342A (en) * | 2016-09-27 | 2018-04-03 | 华中科技大学 | A kind of pipeline snaking based on liquid electric pulse shock wave and rock stratum fracturing device |
| CN114542071A (en) * | 2022-04-08 | 2022-05-27 | 山东科技大学 | Coal seam water injection system based on integration of fracturing and ultrasonic excitation and operation method thereof |
-
2018
- 2018-11-01 CN CN201811295774.6A patent/CN109142193A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104061014A (en) * | 2014-07-07 | 2014-09-24 | 太原理工大学 | Coal seam anti-reflection experiment device based on high-voltage electric pulse |
| CN107869342A (en) * | 2016-09-27 | 2018-04-03 | 华中科技大学 | A kind of pipeline snaking based on liquid electric pulse shock wave and rock stratum fracturing device |
| CN114542071A (en) * | 2022-04-08 | 2022-05-27 | 山东科技大学 | Coal seam water injection system based on integration of fracturing and ultrasonic excitation and operation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 王贻明: "应力波强化堆浸渗流的理论与试验研究", 《CNKI博士电子期刊-工程科技Ⅰ辑》, pages 71 - 92 * |
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Application publication date: 20190104 |