CN202710543U - Absorption-desorption-percolation experiment system of loaded coal containing gas under variable temperature condition - Google Patents
Absorption-desorption-percolation experiment system of loaded coal containing gas under variable temperature condition Download PDFInfo
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- CN202710543U CN202710543U CN 201220395426 CN201220395426U CN202710543U CN 202710543 U CN202710543 U CN 202710543U CN 201220395426 CN201220395426 CN 201220395426 CN 201220395426 U CN201220395426 U CN 201220395426U CN 202710543 U CN202710543 U CN 202710543U
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Abstract
The utility model discloses an absorption-desorption-percolation experiment system of loaded coal containing gas under a variable temperature condition. The absorption-desorption-percolation experiment system comprises a pond body for containing constant temperature water bath, wherein a three-shaft pressure chamber is arranged in the pond body, a coal chamber is arranged in the three-shaft pressure chamber, a coal sample is installed in the coal chamber, a strain foil is adhered to the coal sample and connected with a dynamic strain meter, one end of the coal chamber is open, and a press head is arranged in an opening and connected with a pressure device. The coal chamber is communicated with a vacuum pipe and a high-pressure gas pipe, and a cavity between the coal chamber and the three-shaft pressure chamber is communicated with a confining pressure pipe for delivering hydraulic oil. The absorption-desorption-percolation experiment system of the loaded coal containing gas under the variable temperature condition is simple in structure, convenient to operate, reasonable in design, high in experiment accuracy and low in price.
Description
Technical field
The utility model relates to the experimental study technology of stand under load coal containing methane gas absorption-desorption-percolation law in a kind of process of coal mining, is a kind of absorption-desorption-seepage flow experiment system that is applicable to coal containing methane gas under the temperature match curing conditions.
Background technology
In process of coal mining, exist very complicated interactive relationship between coal body and the methane gas, the migration of gas in coal body is subjected to the restriction of gas adsorption parsing, gas pressure, terrestrial stress state, underground water, ground temperature, Coal Pore Structure etc. factors, shows strong multifactor Dynamic Coupling relation between coal deformation and the gas migration.Coal mine gas explosion, particularly coal and Gas Outburst are under given conditions a kind of external reflection and performances after these factor couplings.Along with the China's coal-mine mining depth constantly increases, coal body is in more complicated tax dis environment (high-ground stress, High-geotemperature, hyperosmosis), in addition strong mining influence and time effect, all great changes will take place to cause institutional framework, basic act feature and the engineering response of deep coal and rock, the Adsorption and desorption between coal body and the gas, seepage flow, deformation rule and between interaction only can become more intricate.In seam mining reality, the absorption of all coal-bed gas, parsing and migration process all are to occur under certain load-up condition, and deep mining is all the more so.Therefore the coal-bed gas of studying under the loaded condition adsorbs-resolves feature and migration rule, to the generation of explaining the coal-mine gas disaster with instruct Safety of Coal Mine Production to have more specific aim and actual effect.
In China, a lot of experts and scholars have done a large amount of intensive research works to absorption, parsing, transport characteristics and the rule of coal containing methane gas, but also have the following disadvantages:
(1) the factors such as temperature control, loading procedure, absorption-parsing impact, coal sample distortion is not considered, and do comparatively perfect global design.
(2) it is less to add load (comprising confined pressure, axle pressure, pore pressure etc.) scope, can't characterize the load characteristic under the Mining in Deep-lying Conditions, can not satisfy the scientific research demand to the further investigation of stand under load coal containing methane gas.
(3) be difficult to accomplish long-term loading, it is stable not to cause testing load.
(4) because the problem of encapsulating method and technology, a lot of experimental provision impermeability are good not, usually leak air, oil leakage phenomenon, and it is unstable to cause testing load-up condition, cause the result not accurate enough, be difficult to the real features of coal containing methane gas under the reflection particular experiment load-up condition.
(5) airing form of coal sample is difficult to guarantee fully that methane gas is with the mode of the face inflation coal sample of flowing through equably.
The utility model content
The purpose of this utility model provides a kind of simple in structure, easy to operate, reasonable in design, the absorption-desorption-seepage flow experiment system of stand under load coal containing methane gas under temperature match curing conditions that experimental precision is high, cheap.
For achieving the above object, the utility model adopts following technical scheme: stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under a kind of temperature match curing conditions, comprise the pond body for the splendid attire water bath with thermostatic control, establish the triaxial cell in the body of pond, the indoor coal chamber of establishing of triaxial pressure, coal indoor location coal sample, post foil gauge on the coal sample, foil gauge is connected with dynamic strain indicator, and coal chamber one end opening also is provided with pressure head in opening, and pressure head is connected with pressure apparatus; The coal chamber is communicated with vacuum line and high pressure gas pipeline, and the chamber between coal chamber and the triaxial cell is communicated with the confined pressure pipeline for delivery of hydraulic oil.
Described coal chamber comprises coal chamber base and heat-shrink tube, and coal chamber base is relative up and down with pressure head, and the heat-shrink tube two ends are wrapped in respectively the outer ring, bottom of pressure head and the outer ring, top of coal chamber base.
Be provided with the silastic-layer of 1mm-2mm around the border of coal sample.
The airtight setting in triaxial cell, pressure head is pegged graft at triaxial cell's top board.
Described pressure apparatus is the reaction frame that triaxial cell's upside is fixedly connected with, and the hydraulic stem of reaction frame hydraulic cylinder stretches out downwards and connects pressure head, is provided with displacement transducer and strain gauge between hydraulic stem and the pressure head, and reaction frame is provided with suspension ring.
Described confined pressure pipeline comprises oil inlet pipe and the draw-off pipe that is connected to the triaxial cell, connects successively oil pressure gauge, oil pressure adjusting valve, the first confined pressure switch valve and hydraulic power unit on the oil inlet pipe, and draw-off pipe is provided with the second confined pressure switch valve; The top of triaxial cell is connected with the evacuated tube that switch valve is set.
Described vacuum line is connected an air inlet pipeline with the high pressure gas pipeline by T-valve, the inlet channel access top, coal chamber that the air inlet pipeline end arranges by pressure head, coal chamber base is provided with the exhaust passage, triaxial cell's base plate is provided with the interstitial hole that is connected with the exhaust passage, and the external port of interstitial hole is connected with the outlet pipe for exhaust.
Described high pressure gas pipeline is provided with the high pressure gas tank, and T-valve is provided with switch valve, rain glass, air pressure regulator, reduction valve and switch valve successively to the high pressure gas pipeline between the high pressure gas pipe.
Described vacuum line is provided with vacuum pump, and T-valve is provided with vacuum meter and switch valve successively to the vacuum line between the vacuum pump.
Inlet channel is provided with mass-flow gas meter and switch valve successively to the air inlet pipeline between the T-valve, also be provided with gas meter and switch valve on the outlet pipe.
Stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions described in the utility model, by ram pressures loading, confined pressure loading, high pressure gas pressure feed, temperature control, vacuum-pumping pipeline, dynamic strain indicator test, can under different loads and condition of different temperatures, carry out to coal containing methane gas the absorption-desorption-Seepage Experiment of coal containing methane gas.This cover experimental system and method can be used for: (1) comparative study coal containing methane gas under loaded condition with non-loaded condition under, under the temperature match curing conditions and the Adsorption-desorption Characteristics under the constant temperature; (2) the absorption-desorption process of research coal containing methane gas under different loads and different temperatures effect, absorption constant and absorption-desorption amount are with the Changing Pattern of load and temperature; (3) research changes because coal containing methane gas destroys the adsorption-desorption characteristics that causes under loading environment; (4) seepage characteristic of research coal containing methane gas under different loads and condition of different temperatures, the percolation law of research coal containing methane gas under the solid coupling condition of hot gas; (5) distortion of research coal containing methane gas adsorption swelling is subjected to influencing characteristic and the rule of external applied load and temperature.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Embodiment
By stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under a kind of temperature match curing conditions shown in Figure 1, comprise the pond body 17 for the splendid attire water bath with thermostatic control, establish triaxial cell 1 in the pond body 17, establish the coal chamber in the triaxial cell 1.
Triaxial cell 1 is airtight setting, comprise up and down over against top board 2, base plate 3 and the side plate that between top, base plate 2,3, encloses, be plugged with vertical column pressure head 8 on triaxial cell's 1 top board 2, the bottom of pressure head 8 is positioned at triaxial cell 1, and pressure head 8 tops protrude upward outside the triaxial cell 1.Described coal chamber is made of coal chamber base 9 and vertical heat-shrink tube 7, coal chamber base 9 is fixedly arranged on triaxial cell's 1 base plate, 3 upsides, coal chamber base 9 is relative up and down with pressure head 8, heat-shrink tube 7 upper/lower terminals are wrapped in respectively the outer ring, bottom of pressure head 8 and the outer ring, top of coal chamber base 9, and namely pressure head 8 is positioned at coal chamber top end opening.Coal indoor location coal sample 6 is provided with the silastic-layer of 1mm-2mm around the border of coal sample 6, posts foil gauge 45 on the coal sample 6, and foil gauge 45 is connected with dynamic strain indicator 46.
Pressure head 8 is connected with pressure apparatus, described pressure apparatus is the reaction frame 19 that triaxial cell's 1 upside is fixedly connected with, the hydraulic stem of the hydraulic cylinder 18 of reaction frame 19 stretches out downwards and connects pressure head 8 tops, be provided with displacement transducer 15 and strain gauge 16 between hydraulic stem and the pressure head 8, reaction frame 19 tops are provided with suspension ring 20.The pipeline connection hydraulic power unit 22 that the hydraulic cylinder 18 of described reaction frame 19 is connected by setting gradually reaction frame oil pressure gauge 27, reaction frame oil pressure adjusting valve 24 and reaction frame switch valve.Reaction frame 19 is prior art, so be not described in detail.
The coal chamber is communicated with vacuum line 5 and high pressure gas pipeline 4 by an air inlet pipeline 12, air inlet pipeline 12 ends are provided with T-valve 40, and air inlet pipeline 12 connects respectively vacuum line 5 and high pressure gas pipeline 4 by T-valve 40, described high pressure gas pipeline 4 is provided with high pressure gas tank 42, and T-valve 40 is provided with the first gas switch valve 33, rain glass 28, air pressure regulator 25, reduction valve 39 and the second gas switch valve 32 successively to the high pressure gas pipeline 4 between the high pressure gas pipe.Described vacuum line 5 is provided with vacuum pump 41, and T-valve 40 is provided with vacuum meter 29 and switch valve 34 successively to the vacuum line 5 between the vacuum pump 41.The inlet channel access top, coal chamber that air inlet pipeline 12 ends arrange by pressure head 8, inlet channel is provided with mass-flow gas meter 43 and switch valve 35 successively to the air inlet pipeline 12 between the T-valve 40; Coal chamber base 9 is provided with the exhaust passage, and the base plate 3 of triaxial cell 1 is provided with the interstitial hole that is connected with the exhaust passage, and the external port of interstitial hole is connected with the outlet pipe 13 for exhaust.Outlet pipe 13 is provided with gas meter 44 and switch valve 38.
Cavity between coal chamber and the triaxial cell 1 is communicated with the confined pressure pipeline for delivery of hydraulic oil, described confined pressure pipeline comprises oil inlet pipe 10 and the draw-off pipe 11 that is connected to triaxial cell 1, offer two oil ducts on the base plate 3 of triaxial cell 1, oil inlet pipe 10 and draw-off pipe 11 are connected to the external port of two oil ducts, and the inner port of two oil ducts is 1 the chamber cavity towards the triaxial cell respectively.Connect successively oil pressure gauge 26, oil pressure adjusting valve 23, the first confined pressure switch valve 30, and last access hydraulic power unit 21 on the described oil inlet pipe 10.Draw-off pipe 11 is provided with the second confined pressure switch valve 37; The top board 2 of triaxial cell 1 is connected with the evacuated tube 14 that switch valve 36 is set.
Stand under load coal containing methane gas absorption-desorption-Seepage Experiment specific implementation process is as follows:
(1) gets an experiment coal sample 6, foil gauge 45 symmetries are affixed on coal sample 6 surfaces, and have welded the enamel-cover silk, and then smear the thick silastic-layer of one deck 1～2mm on coal sample 6 surfaces.
(2) open the top board 2 of triaxial cell 1, the coal sample 6 that wipes silastic-layer is placed on the coal chamber base 9 carefully.
(3) heat-shrink tube 7 that extracts about a segment length 30cm is enclosed within coal sample 6 outsides, puts pressure head 8 in coal sample 6 upper surfaces again.To heat-shrink tube 7 homogeneous heatings, so that heat-shrink tube 7 is tightly waled coal sample 6 surfaces, guarantee that simultaneously the joint of enamel-cover silk can stretch out the outside of heat-shrink tube 7 with blowing hot wind.
(4) get two aglets, the upper and lower side of heat-shrink tube 7 is separately fixed on pressure head 8 and the coal chamber base 9, then with a small amount of silicon rubber the space between heat-shrink tube 7 and pressure head 8 and the coal chamber base 9 is tamped, and the joint of enamel-cover silk is welded with electric soldering iron with the wire that is connected on the dynamic strain indicator 46.After silicon rubber parches, the top board 2 of triaxial cell 1 is installed on triaxial cell's 1 side plate, and pulls tight screw.
(5) install displacement transducer 15, strain gauge 16, and by screw reaction frame 19 is installed on the top board 2 of triaxial cell 1.Then utilize lifting gear to pass through suspension ring 20, triaxial cell 1 is put into the pond body 17 of water bath with thermostatic control, connect all gas circuits and oil circuit, and close all controlled valves.
(6) temperature with water bath with thermostatic control transfers to the experiment preset value, opens the first confined pressure switch valve 30, reaction frame switch valve 31, utilizes the axial compression charger---pressure apparatus and pressure head 8 and confined pressure charger---, and the confined pressure pipeline adds to predetermined value with axial compression and confined pressure.
(7) with T-valve 40 and vacuum pump 41 circuit communication, open switch valve 35,34, checked after the impermeability in loop, start vacuum pump 41, begin coal sample 6 is vacuumized, and keep more than the 10h.After vacuum tightness reached requirement, closing switch valve 35,34 cut out vacuum pump 41 at last successively.
(8) T-valve 40 is communicated with high pressure gas loop 4, opens first the second gas switch valve 32 and reduction valve 39, utilize air pressure regulator 25, in conjunction with rain glass 28, gas pressure is transferred to the experiment predetermined value.Then open successively the first gas switch valve 33, switch valve 35, coal sample 6 is carried out adsorption experiment, open simultaneously the deformation of dynamic strain indicator 46 record coal samples 6, utilize mass-flow gas meter record gas flow, and keep coal sample 6 adsorption times to be no less than 24h.
(9) after coal sample 6 reaches adsorption equilibrium, then closing switch valve 35 opens switch valve 38, and the experiment of beginning desorption of mash gas utilizes mass-flow gas meter record desorb gas flow.
(10) repeat above-mentioned steps (1)～(9), by changing load parameter, carry out the Adsorption-desorption Characteristics experiment of the stand under load coal containing methane gas under the various experiment conditions.
(11) finish above-mentioned steps (1)～(9) afterwards, open switch valve 35, connect high pressure gas tank 42, allow methane gas evenly pass through coal sample 6 with constant pressure size, beginning gas Seepage Experiment is by the time the reading of mass-flow gas meter 43, gas meter 44 begins to record data on flows after relatively stable.
(12) coal containing methane gas seepage characteristic experiment under the various load-up conditions just can be realized by changing load parameter in repeating step (1)～(11).
(13) after experiment finishes, close first high pressure gas tank 42, close successively again hydraulic power unit 21,22, open switch 37, allow the hydraulic oil in the triaxial cell 1 be back in the fuel tank.Then triaxial cell 1 is carried to water bath with thermostatic control, opened triaxial cell's top board 2, take out coal sample 6, close all switch of not closing and power supplys after experimental system is cleaned up.
Claims (10)
1. stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions, it is characterized in that: comprise the pond body for the splendid attire water bath with thermostatic control, establish the triaxial cell in the body of pond, the indoor coal chamber of establishing of triaxial pressure, coal indoor location coal sample is posted foil gauge on the coal sample, foil gauge is connected with dynamic strain indicator, coal chamber one end opening also is provided with pressure head in opening, pressure head is connected with pressure apparatus; The coal chamber is communicated with vacuum line and high pressure gas pipeline, and the chamber between coal chamber and the triaxial cell is communicated with the confined pressure pipeline for delivery of hydraulic oil.
2. stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions as claimed in claim 1, it is characterized in that: described coal chamber comprises coal chamber base and heat-shrink tube, coal chamber base is relative up and down with pressure head, and the heat-shrink tube two ends are wrapped in respectively the outer ring, bottom of pressure head and the outer ring, top of coal chamber base.
3. stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions as claimed in claim 1 or 2 is characterized in that: the silastic-layer that is provided with 1mm-2mm around the border of coal sample.
4. stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions as claimed in claim 3, it is characterized in that: the airtight setting in triaxial cell, pressure head is pegged graft at triaxial cell's top board.
5. stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions as claimed in claim 4, it is characterized in that: described pressure apparatus is the reaction frame that triaxial cell's upside is fixedly connected with, the hydraulic stem of reaction frame hydraulic cylinder stretches out downwards and connects pressure head, be provided with displacement transducer and strain gauge between hydraulic stem and the pressure head, reaction frame is provided with suspension ring.
6. stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions as claimed in claim 5, it is characterized in that: described confined pressure pipeline comprises oil inlet pipe and the draw-off pipe that is connected to the triaxial cell, connect successively oil pressure gauge, oil pressure adjusting valve, the first confined pressure switch valve and hydraulic power unit on the oil inlet pipe, draw-off pipe is provided with the second confined pressure switch valve; The top of triaxial cell is connected with the evacuated tube that switch valve is set.
7. stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions as claimed in claim 6, it is characterized in that: described vacuum line is connected an air inlet pipeline with the high pressure gas pipeline by T-valve, the inlet channel access top, coal chamber that the air inlet pipeline end arranges by pressure head, coal chamber base is provided with the exhaust passage, triaxial cell's base plate is provided with the interstitial hole that is connected with the exhaust passage, and the external port of interstitial hole is connected with the outlet pipe for exhaust.
8. stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions as claimed in claim 7, it is characterized in that: described high pressure gas pipeline is provided with the high pressure gas tank, and T-valve is provided with switch valve, rain glass, air pressure regulator, reduction valve and switch valve successively to the high pressure gas pipeline between the high pressure gas pipe.
9. stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions as claimed in claim 8, it is characterized in that: described vacuum line is provided with vacuum pump, and T-valve is provided with vacuum meter and switch valve successively to the vacuum line between the vacuum pump.
10. stand under load coal containing methane gas absorption-desorption-seepage flow experiment system under the temperature match curing conditions as claimed in claim 9, it is characterized in that: inlet channel is provided with mass-flow gas meter and switch valve successively to the air inlet pipeline between the T-valve, also is provided with gas meter and switch valve on the outlet pipe.
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| CN 201220395426 CN202710543U (en) | 2012-08-10 | 2012-08-10 | Absorption-desorption-percolation experiment system of loaded coal containing gas under variable temperature condition |
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| CN 201220395426 CN202710543U (en) | 2012-08-10 | 2012-08-10 | Absorption-desorption-percolation experiment system of loaded coal containing gas under variable temperature condition |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102830213A (en) * | 2012-08-10 | 2012-12-19 | 河南理工大学 | Adsorption-desorption-seepage experiment system for loaded coal containing gas under condition of varying temperatures |
| CN103207130A (en) * | 2013-04-18 | 2013-07-17 | 山东科技大学 | Method for testing deformation feature parameters of coal test sample in thermal expansion process |
| CN103558357A (en) * | 2013-10-25 | 2014-02-05 | 河南理工大学 | Experiment device for detecting influence of moisture on methane desorption rule |
| CN103776979A (en) * | 2014-01-10 | 2014-05-07 | 河南理工大学 | Simulation test method and device for inhibiting methane desorption effect by coal seam water injection |
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| CN104453878A (en) * | 2014-11-12 | 2015-03-25 | 河南理工大学 | Multi-element gas displacement coal bed methane testing device based on process real-time tracking control |
| CN104535455A (en) * | 2015-01-07 | 2015-04-22 | 河南理工大学 | Gas seepage experiment device and method for dynamically monitoring pore pressure distribution and changes |
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| CN108533255A (en) * | 2018-03-28 | 2018-09-14 | 中南大学 | Coal petrography sample aerogenesis under temperature-pressure effect tests system and method |
| CN109870397A (en) * | 2019-04-02 | 2019-06-11 | 贵州大学 | Isothermal adsorption deformation testing device and test method under the conditions of a kind of mixed gas |
| CN111521516A (en) * | 2019-12-11 | 2020-08-11 | 南通市飞宇石油科技开发有限公司 | Coal body gas adsorption and strain test system |
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2012
- 2012-08-10 CN CN 201220395426 patent/CN202710543U/en not_active Withdrawn - After Issue
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102830213A (en) * | 2012-08-10 | 2012-12-19 | 河南理工大学 | Adsorption-desorption-seepage experiment system for loaded coal containing gas under condition of varying temperatures |
| CN103207130A (en) * | 2013-04-18 | 2013-07-17 | 山东科技大学 | Method for testing deformation feature parameters of coal test sample in thermal expansion process |
| CN103558357A (en) * | 2013-10-25 | 2014-02-05 | 河南理工大学 | Experiment device for detecting influence of moisture on methane desorption rule |
| CN103776979B (en) * | 2014-01-10 | 2016-02-24 | 河南理工大学 | A kind of coal seam water infusion suppresses analog detection method and the device of desorption of mash gas effect |
| CN103776979A (en) * | 2014-01-10 | 2014-05-07 | 河南理工大学 | Simulation test method and device for inhibiting methane desorption effect by coal seam water injection |
| CN103915018A (en) * | 2014-04-30 | 2014-07-09 | 辽宁工程技术大学 | Coal rock three-shaft loading slow pyroelectric detection experiment device and experiment method thereof |
| CN103915018B (en) * | 2014-04-30 | 2016-01-20 | 辽宁工程技术大学 | Coal petrography three axle loads slow pyroelectricity test experience device and experimental technique thereof |
| CN104453878A (en) * | 2014-11-12 | 2015-03-25 | 河南理工大学 | Multi-element gas displacement coal bed methane testing device based on process real-time tracking control |
| CN104535455A (en) * | 2015-01-07 | 2015-04-22 | 河南理工大学 | Gas seepage experiment device and method for dynamically monitoring pore pressure distribution and changes |
| CN107907467A (en) * | 2017-12-01 | 2018-04-13 | 贵州大学 | A kind of true triaxial seepage experimental apparatus for applying non-uniform load |
| CN108533255A (en) * | 2018-03-28 | 2018-09-14 | 中南大学 | Coal petrography sample aerogenesis under temperature-pressure effect tests system and method |
| CN109870397A (en) * | 2019-04-02 | 2019-06-11 | 贵州大学 | Isothermal adsorption deformation testing device and test method under the conditions of a kind of mixed gas |
| CN111521516A (en) * | 2019-12-11 | 2020-08-11 | 南通市飞宇石油科技开发有限公司 | Coal body gas adsorption and strain test system |
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Granted publication date: 20130130 Effective date of abandoning: 20150729 |
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