CN105259328A - Physical simulation test device for influence of hydraulic measures on coal gas seepage characteristics - Google Patents
Physical simulation test device for influence of hydraulic measures on coal gas seepage characteristics Download PDFInfo
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- CN105259328A CN105259328A CN201510624413.1A CN201510624413A CN105259328A CN 105259328 A CN105259328 A CN 105259328A CN 201510624413 A CN201510624413 A CN 201510624413A CN 105259328 A CN105259328 A CN 105259328A
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- 238000012360 testing method Methods 0.000 title claims abstract description 22
- 239000003034 coal gas Substances 0.000 title claims abstract description 13
- 238000004088 simulation Methods 0.000 title abstract description 5
- 239000003245 coal Substances 0.000 claims abstract description 83
- 239000007789 gas Substances 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 239000012071 phase Substances 0.000 claims abstract description 10
- 239000007791 liquid phase Substances 0.000 claims abstract description 8
- 238000005303 weighing Methods 0.000 claims abstract description 7
- 239000001307 helium Substances 0.000 claims abstract description 5
- 229910052734 helium Inorganic materials 0.000 claims abstract description 5
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 5
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 4
- 230000035699 permeability Effects 0.000 abstract description 9
- 230000008859 change Effects 0.000 abstract description 8
- 238000000926 separation method Methods 0.000 abstract 2
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 abstract 1
- 230000009545 invasion Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 12
- 210000000476 body water Anatomy 0.000 description 7
- 238000011282 treatment Methods 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 238000001802 infusion Methods 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000011010 flushing procedure Methods 0.000 description 3
- 230000010534 mechanism of action Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000007115 recruitment Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001550 time effect Effects 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a physical simulation test device for the influence of hydraulic measures on coal gas seepage characteristics. The test device comprises a stress loading system, a gas-liquid loading system and a gas-water separation system. The stress loading system includes a coal sample holder, the coal sample holder is provided with a heat insulating layer and a temperature sensor and control unit, one axial end of the coal sample holder is provided with axial loading equipment, the axial loading equipment is connected to an axial pressure loaded needle type manual loading pump, the side wall of the coal sample holder is connected to a confining pressure loaded needle type manual loading pump, and the other axial end of the coal sample holder is in connection with the gas-liquid loading system. The gas-liquid loading system is provided with a gas phase pipeline and a liquid phase pipeline, the gas phase pipeline is connected to a high pressure gas bottle and a high pressure helium bottle respectively, the liquid phase pipeline is in connection with a hydraulic constant flux pump. The outer end of the axial loading equipment is connected to the gas-water separation system, which comprises a vacuum pump and a gas-water separator. The gas-water separator and the coal sample holder are respectively provided with a weighing apparatus. The test device provided by the invention can conduct in-depth study on the change law of coal moisture content and gas permeability and the coupling relationship thereof during and after invasion of high pressure water of certain pressure into a gas-containing original coal bed.
Description
Technical field
The present invention relates to the experimental provision of a kind of coal seam coal gas dynamics simulation, particularly relate to the physical analog test apparatus that a kind of waterpower measure affects coal gas seepage characteristic.
Background technology
High methane pressure, low-permeability and high outburst hazard are the essential characteristics of China's main coal and gas prominent mining area ocurrence of coal seam, how to increase gas permeability of coal seam, reduce gas pressure and and then eliminate the important subject that Coal Seam Outburst Hazard is Gas Disaster prevention and control field.At present, waterpower technical measures, as strengthening gas pumping and the important means of preventing and treating coal and gas prominent, obtain in practice applying comparatively widely, comprise coal seam water infusion, hydraulic flushing in hole, hydraulic slotted liner technique, waterpower and waterfrac treatment etc.Research in the past shows, the mechanism of action of different waterpower measures in Gas Disaster control is not quite similar, as: Su Xianbo etc. test coal sample free-boundary problem and permeability, think that the gas of coal seam water infusion to matrix coal cinder inside achieves closed, make desorption of mash gas more difficult, simultaneously along with water saturation increases, free-boundary problem increases and permeability reduction, and this is the reason that coal seam water infusion suppresses Gas; Liu Mingju etc. examine the effect of hydraulic flushing in hole in severe outburst coal, think that waterpower keyhole surrounding medium moves to duct, cause coal deformation and top, base plate displacement in opposite directions, make coal seam obtain release, improve gas permeability of coal seam simultaneously; Lin Baiquan etc. propose brill and cut and take out integrated technique, and think that high-pressure hydraulic slot destroys boring area of stress concentration around, slot surrounding medium produces a large amount of stretching crack and shear crack when slot space is moved, increases the gas penetration potential in coal seam; Wangkai, Liu Mingju etc. have investigated the protrusion-dispelling effect of hydrodynamic behavior respectively, and think that extruding of coal body makes the concentrated stress band reach of workplace front, release drainage is broadening, and the gas penetration potential of broken coal strengthens simultaneously; Rich to the anti-reflection mechanism analyzing waterfrac treatment, after thinking that boring, under water under high pressure effect, crack initiation occurs, water pressure is produced in the bed plane of water under high pressure in coal seam, plane of weakness at different levels such as cutting crack and initial fissure etc., this grade of plane of weakness is impelled expansion to occur and extends, and the formation interpenetrating network that is progressively interconnected in coal seam, cause the pressure break in coal seam to decompose.
Can find out from the above analysis, take coal seam water infusion to prevent the mechanism of coal and gas prominent to be by waterpower measure, suppress the desorb of adsorption gas in coal in water filling region, make the increase of coal body water percentage simultaneously, plasticity strengthens, permeability reduction; And about waterpower measures such as hydraulic flushing in hole, hydraulic slotted liner technique, hydrodynamic behavior and waterfrac treatments, research emphasis in the past then mainly concentrate on how to change stress in coal bed state and promote coalmass crevasse growth with development on.It should be noted that, although construction technology and the mechanism of action of each waterpower measure there are differences, but their common features without exception all to make ambient pressure water enter coal seam by coalmass crevasse passage, and the coal seam water-cut variation that waterpower measure causes and the damage depression effect to coal seam permeability, be that strengthen the object of gas pumping with waterpower measure conflicting in essence.
In general, the understanding that current people are immersed in the affecting laws of coal seam water percentage and gas permeation rate about ambient pressure water is still not deep enough at present, lack systematic research, thus have influence on waterpowerization strengthening gas pumping and the choose reasonable of gas control technology scheme and process parameter optimizing thereof and recruitment evaluation to a certain extent.
Summary of the invention
The object of this invention is to provide in a kind of energy systematic study irrigation measure implementation process and after implementing, namely water under high pressure invades primitive coalbed process gassy and afterwards, the physical analog test apparatus that the Changing Pattern of coal body water percentage and gas permeation rate and the waterpower measure of coupled relation thereof affect coal gas seepage characteristic.
The object of the invention is to be achieved through the following technical solutions:
The physical analog test apparatus that waterpower measure of the present invention affects coal gas seepage characteristic, comprise stress loading system, gas-liquid loading system and separating system for water, described stress loading system comprises coal sample clamper, described coal sample clamper is provided with heat-insulation layer and temperature sensing and control device, one end of described coal sample clamper axis is provided with axial loading device, described axial loading device is connected with the pin type manual loading pump that axial compression loads, the sidewall of described coal sample clamper is connected with the pin type manual loading pump of confined pressure loading, the other end of described coal sample clamper axis is connected with gas-liquid loading system, described gas-liquid loading system is provided with gas phase pipeline and liquid phase pipeline, and described gas phase pipeline is connected respectively with high pressure gas bottle and high pressure helium gas cylinder, and described liquid phase pipeline is connected with waterpower constant-flux pump, the outer end of described axial loading device is connected with separating system for water, and described separating system for water comprises vacuum pump and moisture trap.
As seen from the above technical solution provided by the invention, the physical analog test apparatus that the waterpower measure that the embodiment of the present invention provides affects coal gas seepage characteristic, primitive coalbed process gassy and afterwards, the Changing Pattern of coal body water percentage and gas permeation rate and coupled relation thereof can be invaded by the deep research water under high pressure of system.
Accompanying drawing explanation
The waterpower measure that Fig. 1 provides for the embodiment of the present invention is on the structural representation of the physical analog test apparatus that coal gas seepage characteristic affects.
In figure:
1, high pressure gas bottle, 2, high pressure helium gas cylinder, 3, waterpower constant-flux pump, 4, pressure transducer, 5, the pin type manual loading pump that loads of confined pressure, 6, temperature sensing and control device, 7, the pin type manual loading pump that loads of axial compression, 8, flow sensor, 9, moisture trap, 10, heat-insulation layer, 11, vacuum pump, 12, coal sample is tested, 13, axial loading device.
Embodiment
To be described in further detail the embodiment of the present invention below.
The physical analog test apparatus that waterpower measure of the present invention affects coal gas seepage characteristic, its preferably embodiment be:
Comprise stress loading system, gas-liquid loading system and separating system for water, described stress loading system comprises coal sample clamper, described coal sample clamper is provided with heat-insulation layer and temperature sensing and control device, one end of described coal sample clamper axis is provided with axial loading device, described axial loading device is connected with the pin type manual loading pump that axial compression loads, the sidewall of described coal sample clamper is connected with the pin type manual loading pump of confined pressure loading, and the other end of described coal sample clamper axis is connected with gas-liquid loading system; Described gas-liquid loading system is provided with gas phase pipeline and liquid phase pipeline, and described gas phase pipeline is connected respectively with high pressure gas bottle and high pressure helium gas cylinder, and described liquid phase pipeline is connected with waterpower constant-flux pump; The outer end of described axial loading device is connected with separating system for water, and described separating system for water comprises vacuum pump and moisture trap.
On the loading pipeline of the pin type manual loading pump that described axial compression loads, on the loading pipeline of pin type manual loading pump that loads of confined pressure, gas phase pipeline is respectively equipped with pressure transducer, described moisture trap is connected with flow sensor, and described pressure transducer and flow sensor are connected with data acquisition and procession computing machine respectively.
Described moisture trap and coal sample clamper are respectively equipped with weighing device.
In view of the otherness of current each waterpower treatment process and the mechanism of action, the present invention is directed to its common feature, system further investigation water under high pressure invades primitive coalbed process gassy and afterwards, the Changing Pattern of coal body water percentage and gas permeation rate and coupled relation thereof.
Specific embodiment, as shown in Figure 1:
Apparatus structure and detail parameters:
QCT-2 type Permeability Oe Coal And Porous Rock And Fractured Rock test macro (namely coal sample loads and temperature control system):
QTC-2 type Permeability Oe Coal And Porous Rock And Fractured Rock test macro comprises JB-III wobble pump, clamper, temperature measurement system, pressure testing system, displacement transducer, framework and computer acquisition system etc.This device is mainly used to test in different temperatures, coal petrography sample under different pressures.
Technical parameter:
1. core size: φ 50 × 50 ~ 100mm;
2. working pressure: 50MPa;
3. heating power: 800W;
4. working temperature: 80 DEG C.
SartoriusCubis series MSA analytical precision balances (high precision balance):
Cubis series belongs to high precision balance, and this series of products specialized designs is used for the quality measurement of accurate liquid, pasty state, powder or solid material.Accuracy of balance is 0.001g, and weighing capacity journey is 500g.
Cubis balance can independent operation, also can connect PC or networking operation.
STIPT501plus pump (note high-pressure hydraulic pump):
STIPT501plus solvent delivery pump is the series connection Double-post reciprocating infusion pump that a kind of precision is high, accuracy is high and reliability is high, detecting device can be composed with the use of (as ultraviolet, visible ray, conductance, differential refraction detector) with various liquid, also can as the platform tools of solvent delivery.Flow accuracy < ± 1%ul/min, flow range 0.001-10mL/min.Pressure limit 0 ~ 41MPa.
Microcomputer type digital display compound vacuum gauge:
Vacuum counts a road resistance measurement and a road ionization measurement, is combined as compound vacuum gauge.Resistance silicon is applicable to slightly, low-vacuum measurement, i.e. atmospheric pressure 1.0 × 105Pa ~ 1.0 × 10-1Pa are measured, and ionization gauge is applicable to comparatively measure under low vacuum, and measurement range is 1.0Pa ~ 5.0 × 10-5Pa.
Device introduction of the present invention and test method:
Its loading system is made up of coal sample clamper, thermostatically-controlled equipment, Manual pressurization pump and associated satellite device, can realize triaxial compression test, the mode that axial compression and confined pressure adopt waterpower to load, and loading range is 0 ~ 50MPa; Air-water two phase flow independent switch designs and waterpower constant-flux pump can provide gas to adsorb in advance and different outer inundation pressure etc. tests required condition; Full electronic inlet and outlet pressure sensor and flow sensor can the entrance end pressure of the whole experimentation of real time record and gas flows, and Accurate Measurement gas flow also calculates gas permeation rate; Weighed by high precision balance and calculate moisture trap weight change amount, and with the spinner-type flowmeter of piestic water inlet end with the use of, and auxiliary equipment to be used in the real time measure coal sample change of moisture content metering experiment survey aqueous phase flow parameter, simultaneously gas and water separator can also shield gas flow rate meter, and avoids affecting experimental system in experimentation because steam enters gas meter and normally work and cause experimental error; Pin type totally-enclosed water force loading system and coal sample holder designs are convenient to taking of coal sample and are convenient to taking of coal sample with the weighing of coal body water percentage and calculating pin type totally-enclosed water force loading system and coal sample holder designs, can carry out contrast verification by directly weighing coal sample weight to coal sample change of moisture content amount.
Utilize this experimental system, first load dry coal sample and the pre-adsorption equilibrium of gas, then experimental simulation waterpower treatment process mesohigh water enters stand under load coal seam with gas process.Original gas pressure, additional axial compression and confined pressure, intrusion hydraulic pressure and intrusion time is changed according to orthogonal, the each factor of test analysis is on the impact of coal sample gas permeation rate, and often organize experiment terminate after by the change calculating coal sample water percentage increment of weighing, in research waterpower treatment process, the Changing Pattern of stand under load coal body water percentage and gas permeation rate, sets up the relational model that stand under load coal seam with gas waterpower measure condition and coal body water percentage increment and gas permeation rate change.
After waterpower treatment process has been tested, close water under high pressure entrance point, gas entrance point is kept to open, gas porous flow after simulation waterpower measure terminates is gushed out process, test analysis triaxial stress, gas pressure and Seepage flow time effect are to the affecting laws of coal sample water percentage and gas permeation rate, set up stand under load coal body after waterpower measure terminates, coal body water-cut variation and gas porous flow are gushed out the relational model of process, and gas permeation rate is with the EVOLUTION EQUATION of coal body water-cut variation.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (3)
1. waterpower measure physical analog test apparatus that coal gas seepage characteristic is affected, it is characterized in that, comprise stress loading system, gas-liquid loading system and separating system for water, described stress loading system comprises coal sample clamper, described coal sample clamper is provided with heat-insulation layer and temperature sensing and control device, one end of described coal sample clamper axis is provided with axial loading device, described axial loading device is connected with the pin type manual loading pump that axial compression loads, the sidewall of described coal sample clamper is connected with the pin type manual loading pump of confined pressure loading, the other end of described coal sample clamper axis is connected with gas-liquid loading system, described gas-liquid loading system is provided with gas phase pipeline and liquid phase pipeline, and described gas phase pipeline is connected respectively with high pressure gas bottle and high pressure helium gas cylinder, and described liquid phase pipeline is connected with waterpower constant-flux pump, the outer end of described axial loading device is connected with separating system for water, and described separating system for water comprises vacuum pump and moisture trap.
2. waterpower measure according to claim 1 physical analog test apparatus that coal gas seepage characteristic is affected, it is characterized in that, on the loading pipeline of the pin type manual loading pump that described axial compression loads, on the loading pipeline of pin type manual loading pump that loads of confined pressure, gas phase pipeline is respectively equipped with pressure transducer, described moisture trap is connected with flow sensor, and described pressure transducer and flow sensor are connected with data acquisition and procession computing machine respectively.
3. the physical analog test apparatus that affects coal gas seepage characteristic of waterpower measure according to claim 1 and 2, it is characterized in that, described moisture trap and coal sample clamper are respectively equipped with weighing device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510624413.1A CN105259328A (en) | 2015-09-25 | 2015-09-25 | Physical simulation test device for influence of hydraulic measures on coal gas seepage characteristics |
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| CN201510624413.1A CN105259328A (en) | 2015-09-25 | 2015-09-25 | Physical simulation test device for influence of hydraulic measures on coal gas seepage characteristics |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109372571A (en) * | 2018-11-19 | 2019-02-22 | 山东大学 | Coal containing methane gas is anti-reflection, displacement and multiphase porous flow physical simulation experiment System and method for |
| CN109538198A (en) * | 2018-11-12 | 2019-03-29 | 辽宁大学 | Prevent and treat soaked disaster gas injection in coal seam and the integrated experimental provision of punching and application |
| CN110618072A (en) * | 2019-09-06 | 2019-12-27 | 河南工程学院 | Coal body crack monitoring-gas permeation experimental device |
| CN112432881A (en) * | 2020-03-02 | 2021-03-02 | 辽宁工程技术大学 | Gas pore pressure monitoring device bearing axial fixing point in gas-containing coal body |
| CN112504932A (en) * | 2020-11-18 | 2021-03-16 | 河南理工大学 | Mechanical wave vibration excitation coal body permeability increasing experimental device and experimental method thereof |
-
2015
- 2015-09-25 CN CN201510624413.1A patent/CN105259328A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109538198A (en) * | 2018-11-12 | 2019-03-29 | 辽宁大学 | Prevent and treat soaked disaster gas injection in coal seam and the integrated experimental provision of punching and application |
| CN109372571A (en) * | 2018-11-19 | 2019-02-22 | 山东大学 | Coal containing methane gas is anti-reflection, displacement and multiphase porous flow physical simulation experiment System and method for |
| CN109372571B (en) * | 2018-11-19 | 2020-08-25 | 山东大学 | Gas-containing coal permeability increasing, displacement and multiphase seepage physical simulation test system and method |
| CN110618072A (en) * | 2019-09-06 | 2019-12-27 | 河南工程学院 | Coal body crack monitoring-gas permeation experimental device |
| CN112432881A (en) * | 2020-03-02 | 2021-03-02 | 辽宁工程技术大学 | Gas pore pressure monitoring device bearing axial fixing point in gas-containing coal body |
| CN112504932A (en) * | 2020-11-18 | 2021-03-16 | 河南理工大学 | Mechanical wave vibration excitation coal body permeability increasing experimental device and experimental method thereof |
| CN112504932B (en) * | 2020-11-18 | 2023-08-04 | 河南理工大学 | Mechanical wave vibration excitation coal permeability increasing experimental device and experimental method thereof |
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