CN106198340A - A kind of coal seam permeability test system and method simulating pit mining - Google Patents
A kind of coal seam permeability test system and method simulating pit mining Download PDFInfo
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- CN106198340A CN106198340A CN201610453504.8A CN201610453504A CN106198340A CN 106198340 A CN106198340 A CN 106198340A CN 201610453504 A CN201610453504 A CN 201610453504A CN 106198340 A CN106198340 A CN 106198340A
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- 238000012360 testing method Methods 0.000 title claims abstract description 70
- 239000003245 coal Substances 0.000 title claims abstract description 47
- 238000005065 mining Methods 0.000 title claims abstract description 33
- 230000035699 permeability Effects 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 17
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 27
- 239000010959 steel Substances 0.000 claims abstract description 27
- 239000011241 protective layer Substances 0.000 claims abstract description 26
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 230000008595 infiltration Effects 0.000 claims abstract description 9
- 238000001764 infiltration Methods 0.000 claims abstract description 9
- 238000009434 installation Methods 0.000 claims abstract description 7
- 239000007789 gas Substances 0.000 claims description 54
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 17
- 239000000741 silica gel Substances 0.000 claims description 17
- 229910002027 silica gel Inorganic materials 0.000 claims description 17
- 238000004088 simulation Methods 0.000 claims description 17
- 230000001681 protective effect Effects 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 8
- 230000035515 penetration Effects 0.000 abstract description 7
- 230000032683 aging Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 5
- 238000011160 research Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 230000035882 stress Effects 0.000 description 6
- 239000010409 thin film Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003667 anti-reflective effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
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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)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
A kind of coal seam permeability test system and method simulating pit mining, test system includes air intake installation, test device and gas collecting apparatus are sequentially connected, test device includes cube tray steelframe, the surface, left and right of U-steel frame is sealed by acrylic board, before and after U-steel frame, surface and upper and lower surface are sealed by plastic sheeting, form the casing of inner sealing, the end of pressure duct is passed through in casing through acrylic board, the coal seam similar materials that stacking is arranged it is equiped with in casing, the gas entered through pressure duct is passed through in protected seam, test device is connected to gas collecting apparatus by sebific duct, for collecting the gas of infiltration.Protective layer and the position of protected seam when the present invention simulates pit mining; research technique is utilized first to exploit protective layer; and test the Penetration Signature situation of change of protected seam in the process, determine the effectiveness of protective coat extracted and ageing, instruct the actual exploitation of mine.
Description
Technical field
The invention belongs to pit mining technical field, particularly relate to a kind of coal seam permeability test simulating pit mining
System and method.
Background technology
During pit mining, owing to the digging in coal seam causes Coal-body Structure to change, and produce a large amount of crack,
In fissure zone, the Penetration Signature of coal and rock produces notable change, affects the gathering of gas and the distribution of gas pressure, easily
Because gas accumulation causes mine gas disaster accident.In China's " safety regulations in coal mine ", the 193rd article of regulation is " prominent
During pit mining coal seam group, answer the prioritizing selection exploitation prominent measure of protective layer preventing and treating ", " protective coat extracted technical specification " is pointed out
" when protective layer is exploited first in each exploiting field of mine, it is necessary to establishment protected seam protected effect and protection domain investigate design, carry out
Protected effect and the actual investigation of protection domain and checking ", i.e. colliery at exploitation low-permeable and high methane, there is outburst danger
Property coal seam time first have to exploit protective layer, then research records the Penetration Signature of protected coal seam, if reaching " protective coat extracted technology
Specification " requirement, then can exploit protected seam.
At present mainly with laboratory, two kinds of means are tested based on on-the-spot test for coal seam permeability test, for protecting
Protected seam testing permeability under sheath mining conditions is big due to operation easier at the scene, dangerous high, applies less, and real
Test the room infiltrative mode of test and cannot the most dynamically react coal body permeability situation of change during protective coat extracted, to reality
In the recovery process of border, directive function is little, it is impossible to enough actual response protected seam release antireflective effects.
Therefore, it is necessary to coal seam permeability test system during a kind of preferably pit mining of design, above-mentioned to solve
Problem.
Summary of the invention
The problem existed for prior art, the present invention provides a kind of based on test chamber equivalent material simulating protective coat extracted
Under the conditions of, the testing permeability of protected seam, the permeability change of protected seam can be tested dynamically, determine protective coat extracted
Effectiveness and ageing, and test system recycling capable of circulation, have the coal seam of the simulation pit mining of good scalability
Testing permeability system and method.
To achieve these goals, the present invention adopts the following technical scheme that
A kind of coal seam permeability test system simulating pit mining, including air intake installation, test device and gas collecting apparatus
Being sequentially connected, described air intake installation includes gas cylinder, and described gas cylinder is connected to described test device by pressure duct,
Described test device includes cube tray steelframe, and the surface, left and right of described U-steel frame is sealed by acrylic board, described U-steel frame
Before and after surface and upper and lower surface sealed by plastic sheeting, form the casing of inner sealing, the end of described pressure duct is worn
Cross described acrylic board to be passed through in described casing, be equiped with the coal seam similar materials that stacking is arranged in described casing, wherein
Protected seam is positioned at above protective layer, and the gas entered through described pressure duct is passed through in described protected seam, described is protected
Layer passes and is connected to described gas collecting apparatus away from the acrylic board of described pressure duct side for pipeline, for collecting infiltration
Gas.
Further, described pressure duct is additionally provided with Pressure gauge and air relief valve, controls gases at high pressure and enter described test dress
The force value put.
Further, the described protective layer of coal seam similar materials it also is provided with above and below outside described casing.
Further, described U-steel frame is that skeleton enclosure sets and formed by many channel-section steels, and described plastic sheeting is embedded in described channel-section steel in advance
In frame.
Further, described acrylic board is fixed on described channel-section steel by latch and bolt, and described latch is welded in described groove
Steel, described bolt is through described latch and is fixed on described acrylic board.
Further, described acrylic board pastes silica gel plate, described silica gel towards the side of described coal seam similar materials
Plate contacts at described protected seam.
Further, described silica gel plate be all around provided with silica gel sealing bar.
Further, described gas collecting apparatus includes that tank and graduated cylinder, described graduated cylinder are inverted in described tank, described pipeline
One end is stretched in described graduated cylinder.
A kind of method of coal seam permeability based on above-mentioned simulation pit mining test system, including: step one: by coal seam
Similar materials arranged stacked is inside and outside described casing, and described protective layer is positioned at outside and the inside of described casing, described quilt
Protective layer is positioned at described casing, and sandwiched wherein by described protective layer；Step 2: open described gas cylinder and gas is passed through
In described casing；Step 3: simulation pit mining removes the described protective layer outside described casing, is received by described gas collecting apparatus
Collect the gas flow of the most described protected seam infiltration.
Further, described gas collecting apparatus records gas flow by drainage.
Beneficial effects of the present invention:
By installing coal seam similar materials, mould in being sealed, by acrylic board and plastic sheeting, the seal case formed
Intend protective layer and the position of protected seam during pit mining, utilize research technique first to exploit the protective layer of lower section, and test at this
During the infiltration situation of protected seam, the permeability change of protected seam can be tested dynamically, determine protective coat extracted
Effectiveness and ageing, instructs the actual exploitation of mine, and test system recycling capable of circulation, has good scalability,
Utilizing plastic sheeting sealing can either ensure sealing, do not interfere with again the transmission of upper strata terrane stress, i.e. " power transmission is not leaked
Gas ".
Accompanying drawing explanation
Fig. 1 is the structural representation that the present invention simulates the coal seam permeability test system of pit mining；
In figure, 1 gas cylinder, 2 air relief valve, 3 Pressure gauges, 4 pressure ducts, 5 casings, 6 acrylic boards,
7 plastic sheetings, 8 protective layers, 9 protected seams, 10 silica gel plates, 11 silica gel sealing bars, 12 pipelines, 13 water
Groove, 14 graduated cylinders, 15 latches, 16 bolts, 17 channel-section steels.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Base
Embodiment in the present invention, those of ordinary skill in the art obtained under not making creative work premise all its
His embodiment, broadly falls into the scope of protection of the invention.
It is to be appreciated that directional instruction in the embodiment of the present invention (such as up, down, left, right, before and after ...) is only used
In explaining relative position relation between each parts, motion conditions etc. under a certain particular pose (as shown in drawings), if should
When particular pose changes, then directionality instruction changes the most therewith.
Such as Fig. 1, the present invention provides a kind of coal seam permeability test system simulating pit mining, tries in similar materials
Testing and add fluid-wall interaction test device on platform, during solving protective coat extracted, protected seam coal body Penetration Signature can not show
The technological deficiency of field dynamic test, can test the permeability change of protected seam dynamically, determine the effective of protective coat extracted
Property and ageing, instructs the actual exploitation of mine.Above-mentioned coal seam permeability test system includes air intake installation, test device and collection
Device of air is sequentially connected.
Air intake installation includes gas cylinder 1, and gas cylinder 1 is built with gases at high pressure, and gases at high pressure have to nontoxic, nothing
Evil, non-explosive and easily obtaining, therefore in the present embodiment, in gas cylinder 1, installing is high pressure nitrogen.Gas cylinder 1 leads to
Crossing pressure duct 4 to be connected to test device, pressure duct 4 is provided with Pressure gauge 3 and air relief valve 2, and Pressure gauge 3 is used for reading high pressure
The force value of gases at high pressure on pipeline 4, air relief valve 2 uses YQO-09 bottled nitrogen air relief valve, is used for controlling gases at high pressure and enters
The force value of test device, it is ensured that pressure duct 4 outlet pressure remains stable all the time, can provide reliable in experimentation
Pneumatic power source.For ensureing that nitrogen liquid form in pressure duct 4 is one-way flow, ensure that pressure duct 4 is straight as far as possible
Arrange, and require that pressure duct 4 cross section is the most smooth, thus reduce the local resistance of gas flowing in pressure duct 4.
Test device includes cube tray steelframe, and the surface, left and right of U-steel frame is sealed, before U-steel frame by acrylic board 6
Rear surface and upper and lower surface are sealed by plastic sheeting 7, form the casing 5 of inner sealing.The end of pressure duct 4 is through sub-gram
Power plate 6 is passed through in casing 5, is equiped with the coal seam similar materials that stacking is arranged in casing 5, and wherein protected seam 9 is positioned at guarantor
Above sheath 8, the gas entered through pressure duct 4 is passed through in protected seam 9, and protected seam 9 is away from the Asia of pressure duct 4 side
Gram force plate 6 passes for pipeline 12 and is connected to gas collecting apparatus, for collecting the gas of infiltration.Above and below outside casing 5
It also is provided with the protective layer 8 of coal seam similar materials, protective layer 8 and the position relationship of protected seam 9 during simulation pit mining.Choosing
When taking testing permeability system making material, to be selected to bear the material of high pressure, prevent in intake process, test system
There is " explosion " phenomenon.
The design principle of test device is " recycle, ensure airtight, readily accessible ".U-steel frame by many channel-section steels 17 is
Skeleton enclosure sets formation, and the surface forward and backward, upper and lower of test device is evenly equipped with PVC plastic thin film 7, and this plastic sheeting 7 can bear
Relatively atmospheric pressure, PVC plastic thin film 7 be embedded in channel-section steel 17 as skeleton model in.By PVC during modelling
In the pre-buried model of plastic sheeting 7, for ensureing the feature of its " power transmission, air tight ", by the width of the PVC plastic thin film 7 of above-below direction
Degree is set to wider 200mm than model, its two side portions to be folded simultaneously, so can make to be caving rock mass above PVC plastic thin film 7
There is more space, it is ensured that experimental system " power transmission, air tight ", and realize the scalability of device.Use plastic sheeting 7
Do not affect the transmission of stress, due to the Penetration Signature test that experiment is local protected seam, therefore in the condition ensureing sealing
Under, do not affect the transmission of overburden stress, do not affect the application of stress monitoring system.
The left/right panel of test device is made by the acrylic board 6 that thickness is 20mm, in order to improve test device
Bulk strength, concurrently facilitates the back of the body real left and right panel, and left and right panel is fixing real with latch 15 by bolt 16 with channel-section steel 17
Existing.The raw material of latch 15 is Q325 steel plate, and the mode that latch 15 uses fish scale to weld is fixedly connected with channel-section steel 17.Acrylic
Plate 6 is then installed on latch 15 by bolt 16, and bolt 16 is through latch 15 and is fixed on acrylic board 6, with by acrylic
Plate 6 couples together with channel-section steel 17, simultaneously need to the sealing ensured between acrylic board 6 and latch 16 and channel-section steel 17.
The sealing of test system is most important for the success or not of whole experiment, the direct shadow of sealing of test system
Ring control and the collection of rate of discharge of inlet pressure, the flow regime of gas can be made simultaneously to change, make data process not
Meet assumed condition, thereby ensure that the sealing of test system is the key factor of Success in Experiment.In order to improve sealing effectiveness, sub-
Gram force plate 6 pastes silica gel plate 10, silica gel plate towards the side of coal seam similar materials by strength adhesive and special glue
10 contact at protected seam 9, silica gel plate 10 will in acrylic board 6 surrounding wrong 10mm, silica gel plate 10 has good elasticity, energy
Enough sufficiently contact with protected seam 9 surface.Preferably, silica gel plate 10 be all around provided with silica gel sealing bar 11, be used for sealing
Gap between silica gel plate 10 and acrylic board 6.
Gas collecting apparatus includes tank 13 and graduated cylinder 14, and graduated cylinder 14 is inverted in tank 13, and graduated cylinder is stretched in one end of pipeline 12
In 14, by draining water gathering of gas law such Physical entrapment mode, make collection gas flow more accurate.
The present invention simulate pit mining coal seam permeability test system during Equivalent Materials Testing, protected
The enforcement of the Penetration Signature test system of layer 9 can not affect the transmission of stress and the monitoring systematic difference of stress, it is possible to suitable
Answer the occurrence condition of different coal, and be capable of the dynamic test of protected seam 9 Penetration Signature Evolution, have good
Test effect, and there is good scalability, there is preferable economic worth and adaptability, test system features in convenient, letter
Just reliable, recycling capable of circulation.
The method of present invention coal seam permeability based on above-mentioned simulation pit mining test system includes:
Step one: by coal seam similar materials arranged stacked inside and outside casing 5, protective layer 8 be positioned at casing 5 outside and
Inside, protected seam 9 is positioned at casing 5, and protected seam 8 is sandwiched wherein；
Step 2: open gas cylinder 1 and gas is passed through in casing 5；
Step 3: simulation pit mining removes the protective layer 8 below casing 5, and gas collecting apparatus is collected by draining water gathering of gas law
The gas flow of protected seam 9 infiltration in the process.
Protective layer 8 and the position of protected seam 9 when effectively being simulated pit mining by said method, utilize research technique first
Protective layer 8 below exploitation, and test the infiltration situation of protected seam 9 in the process, determine the effectiveness that protective layer 8 is exploited
With ageing, instruct the actual exploitation of mine.
Above example is only in order to illustrate technical scheme and unrestricted, although with reference to preferred embodiment to this
Bright be described in detail, it will be appreciated by those skilled in the art that technical scheme can be modified or etc.
With replacing, without deviating from objective and the scope of the technical program, it all should be contained in scope of the presently claimed invention.
Claims (10)
1. the coal seam permeability test system simulating pit mining, it is characterised in that including: air intake installation, test device
And gas collecting apparatus is sequentially connected, described air intake installation includes that gas cylinder, described gas cylinder are connected to institute by pressure duct
Stating test device, described test device includes cube tray steelframe, and the surface, left and right of described U-steel frame is sealed by acrylic board,
Before and after described U-steel frame, surface and upper and lower surface are sealed by plastic sheeting, form the casing of inner sealing, described high-voltage tube
The end on road is passed through in described casing through described acrylic board, is equiped with the coal seam analog simulation that stacking is arranged in described casing
Material, wherein protected seam is positioned at above protective layer, and the gas entered through described pressure duct is passed through in described protected seam, institute
State the protected seam acrylic board away from described pressure duct side and pass and be connected to described gas collecting apparatus for pipeline, be used for receiving
The gas of collection infiltration.
The coal seam permeability test system of simulation pit mining the most according to claim 1, it is characterised in that: described high pressure
It is additionally provided with Pressure gauge and air relief valve on pipeline, controls gases at high pressure and enter the force value of described test device.
The coal seam permeability test system of simulation pit mining the most according to claim 1, it is characterised in that: described casing
The described protective layer of coal seam similar materials it also is provided with above and below Wai Bu.
The coal seam permeability test system of simulation pit mining the most according to claim 1, it is characterised in that: described channel-section steel
Frame is that skeleton enclosure sets and formed by many channel-section steels, and described plastic sheeting is embedded in described U-steel frame in advance.
The coal seam permeability test system of simulation pit mining the most according to claim 4, it is characterised in that: described Asia gram
Power plate is fixed on described channel-section steel by latch and bolt, and described latch is welded in described channel-section steel, and described bolt passes described latch
And be fixed on described acrylic board.
The coal seam permeability test system of simulation pit mining the most according to claim 1, it is characterised in that: described Asia gram
Power plate pastes silica gel plate towards the side of described coal seam similar materials, and described silica gel plate contacts at described protected seam.
The coal seam permeability test system of simulation pit mining the most according to claim 6, it is characterised in that: described silica gel
Plate be all around provided with silica gel sealing bar.
The coal seam permeability test system of simulation pit mining the most according to claim 1, it is characterised in that: described gas collection
Device includes that tank and graduated cylinder, described graduated cylinder are inverted in described tank, and one end of described pipeline is stretched in described graduated cylinder.
9. a method for coal seam permeability test system based on the simulation pit mining described in claim 1, its feature exists
In, including: step one: by coal seam similar materials arranged stacked inside and outside described casing, described protective layer is positioned at described case
The outside of body and inside, described protected seam is positioned at described casing, and sandwiched wherein by described protective layer；
Step 2: open described gas cylinder and gas is passed through in described casing；
Step 3: simulation pit mining removes the described protective layer outside described casing, is collected in this by described gas collecting apparatus
During described protected seam infiltration gas flow.
The coal seam permeability test system of simulation pit mining the most according to claim 1, it is characterised in that: described collection
Device of air records gas flow by drainage.
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| CN201610453504.8A CN106198340A (en) | 2016-06-22 | 2016-06-22 | A kind of coal seam permeability test system and method simulating pit mining |
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| CN201610453504.8A CN106198340A (en) | 2016-06-22 | 2016-06-22 | A kind of coal seam permeability test system and method simulating pit mining |
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Cited By (5)
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| CN106644891A (en) * | 2017-02-13 | 2017-05-10 | 辽宁工程技术大学 | Testing system for permeability characteristics of simulating relieved coal and rock mass under protective seam mining condition |
| CN106990031A (en) * | 2017-05-27 | 2017-07-28 | 辽宁工程技术大学 | Coal seam containing gas Percolation Law experimental study method under one kind vibration Excavation |
| CN107063970A (en) * | 2017-05-11 | 2017-08-18 | 辽宁工程技术大学 | A kind of test system of three-dimensional simulation release coal and rock Penetration Signature |
| CN108918337A (en) * | 2018-09-18 | 2018-11-30 | 中国矿业大学(北京) | It is a kind of based in seal chamber continuously plus release gas experimental rig and test method |
| CN110186776A (en) * | 2019-05-24 | 2019-08-30 | 太原理工大学 | A kind of multiphase coupled creep loading experimental rig of fragmented rock body and test method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN108918337A (en) * | 2018-09-18 | 2018-11-30 | 中国矿业大学(北京) | It is a kind of based in seal chamber continuously plus release gas experimental rig and test method |
| CN110186776A (en) * | 2019-05-24 | 2019-08-30 | 太原理工大学 | A kind of multiphase coupled creep loading experimental rig of fragmented rock body and test method |
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Application publication date: 20161207 |