CN204116333U - In stand under load coal rupture process, radon gas separates out determinator - Google Patents
In stand under load coal rupture process, radon gas separates out determinator Download PDFInfo
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- CN204116333U CN204116333U CN201420514784.5U CN201420514784U CN204116333U CN 204116333 U CN204116333 U CN 204116333U CN 201420514784 U CN201420514784 U CN 201420514784U CN 204116333 U CN204116333 U CN 204116333U
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Abstract
The utility model provides radon gas in a kind of stand under load coal rupture process and separates out determinator, and comprise triaxial apparatus, triaxial apparatus comprises pressure chamber, and be provided with oil-in and oil-out bottom pressure chamber, top is provided with exhausr port; The heat-shrink tube being provided with seaming chuck, push-down head in pressure chamber and being vertically arranged between upper and lower pressure head, seaming chuck, push-down head and heat-shrink tube surround sample chamber jointly; Be provided with air inlet port in seaming chuck, be provided with duct of giving vent to anger in push-down head, described air inlet port is communicated with carrier gas delivery pipe, described in duct of giving vent to anger be connected with air collector, air collector is connected with emanometer; Described pressure chamber outer wall is provided with calibrate AE sensor, and calibrate AE sensor is connected with CPU (central processing unit).
Description
Technical field
The utility model relates to a kind of test unit studying coal body Radon eduction rule in process of coal mining.
Background technology
China's ocurrence of coal seam complex geologic conditions, the coal rock dynamic disaster such as coal and gas prominent, impulsion pressure, roof fall is serious, causes great harm to the security of the lives and property of the country and people.Along with mine is to deep mining, terrestrial stress and gas pressure increase, and the threat of the coal rock dynamic disaster such as coal and gas prominent, impulsion pressure will be severeer.These disaster accidents are all closely related with coal and rock unstable failure.Also have radioelement to separate out along with dissipation of energy in coal and rock rupture process, radon (Rn) is a kind of important behaviour form.Domestic and international correlative study shows, the change of radon consistence can as the promising coal rock gas dynamic disaster predicting means of one.
Radon is that one has natural radioactive rare gas, the product that it is radium, thorium and these radioelement of actinium are formed in decay process.Radon detection technique is a kind of rising geophysical exploration method.The distribution of radon in the earth's crust is comparatively extensive, almost can find its trace in various rock.Radon general not with other material generation chemical action, but can adsorb by other solid matter, radon exists with the form of free radon, absorption radon and closed radon in rock, to dissolve the form existence of radon and effusion radon in underground water.At present, radon detection technique is widely used in the fields such as earthquake prediction and tectonic structure, GEOTHERMAL WATER, slope stability detection.
In coal rock layer recovery process, free radon is separated out with coal petrography, coal and rock break absorption radon and closed radon also can separate out in a large number.Utilize radon to detect and predict that the coal rock gas dynamic disaster such as coal and gas prominent, rock burst has important researching value.Forefathers are that the coal rock dynamic disaster such as coal and gas prominent, rock burst provides a kind of new Approaches For Prediction about the research that coal petrography rupture process radon consistence changes, but correlative study is also only in the preliminary test stage.The coal seam containing gas dynamic disasters such as coal and gas prominent are the results of Coal-body Structure, terrestrial stress and gas pressure combined action; therefore; develop suitable device and study Radon eduction rule in coal seam containing gas rupture process; be conducive to the Radon Anomaly mechanism and the radon radiation Precursory Characters that disclose coal seam containing gas dynamic disaster further, be expected to for coal rock gas dynamic disaster radon forecasting techniques provides extremely valuable theory support.
Summary of the invention
The purpose of this utility model aims to provide radon gas in a kind of stand under load coal rupture process and separates out determinator.
Based on above-mentioned purpose, the utility model takes following technical scheme: in stand under load coal rupture process, radon gas separates out determinator, and comprise triaxial apparatus, described triaxial apparatus comprises pressure chamber, be provided with oil-in and oil-out bottom pressure chamber, top is provided with exhausr port; The heat-shrink tube being provided with seaming chuck, push-down head in pressure chamber and being vertically arranged between upper and lower pressure head, seaming chuck, push-down head and heat-shrink tube surround sample chamber jointly; Be provided with air inlet port in seaming chuck, be provided with duct of giving vent to anger in push-down head, described air inlet port is communicated with carrier gas delivery pipe, described in duct of giving vent to anger be connected with air collector, air collector is connected with emanometer; Described pressure chamber outer wall is provided with calibrate AE sensor, and calibrate AE sensor is connected with CPU (central processing unit).
Described duct of giving vent to anger is circumscribed with escape pipe, and escape pipe is connected with the first arm, the second arm by T-valve, and wherein the first arm connects emanometer, and the second arm connects air collector, is provided with connecting pipe between air collector and emanometer; Escape pipe is provided with valve; First arm, the second arm or connecting pipe are arbitrary is provided with time arm; Described time arm is connected with vacuum pump, and secondary arm is provided with valve.
Described first arm, the second arm or connecting pipe are provided with gas outlet, and gas outlet is provided with valve.
Described carrier gas delivery pipe connects two-way arm respectively by T-valve, and wherein a road arm is provided with air compressor, and another road arm is connected with gas cylinder; Two-way arm is equipped with valve.
Described seaming chuck bottom, push-down head top are respectively equipped with porous plate.
The determinator that the utility model provides is integrated with triaxial apparatus, analyzer and acoustic emission system etc., has following technical advantage:
1, triaxial apparatus is utilized to apply confined pressure and axle pressure for coal sample, convenient, precisely and controllability is strong.
2, the adjustable easy control of carrier gas, easy to operate, can be used for research Radon eduction to the response characteristic of different methane gas.Affect by confined pressure, stand under load coal sample its structure comparison before the passage of formation crack is fine and close, and poor permeability, the gas flow of now discharging from sample chamber is minimum, is difficult to reliably test.Utilize carrier gas to drive the migration of radon, achieve the rapid and accurate determination that radon gas is separated out.On the other hand, on-the-spot in mine, the existence of coal-bed gas gas is very general again; The migration velocity of radon gas, except outside the Pass having with crack, also significantly associates with the driving of air or methane gas.Therefore, for coal sample test specimen passes into carrier gas, the migration of radon can be accelerated on the one hand, improve measurement sensitivity, also contribute to simulated field situation on the other hand.
3, record the acoustic emission signal of coal sample test specimen in imposed load process, can be used for the relation studying Radon eduction and cranny development, Crack Extension.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment device.
Embodiment
In stand under load coal rupture process, radon gas separates out determinator, as shown in Figure 1, comprise triaxial apparatus, the hydraulic cylinder 17 that triaxial apparatus comprises pressure chamber 1 and is arranged on above pressure chamber 1, pressure chamber 1 is made up of top board 2, base plate 3 and the side plate 19 be around between top board 2 and base plate 3.The heat-shrink tube 7 being provided with seaming chuck 8, push-down head 9 in pressure chamber 1 and being vertically arranged between seaming chuck 8 and push-down head 9, seaming chuck 8, push-down head 9 surround sample chamber jointly with heat-shrink tube 7; Seaming chuck 8 bottom is provided with porous plate 4, and push-down head 9 top is provided with porous plate 5.Seaming chuck 8 protrudes upward outside top board 2, and the hydraulic stem of hydraulic cylinder 17 stretches out downwards and connects the top of seaming chuck 8; Displacement transducer 15 and strain gauge 16 is provided with between hydraulic stem and seaming chuck 8.Top board 2 is provided with exhausr port 13, and base plate 3 is provided with oil-in 10 and oil-out 11, and oil-in 10 is by oil pipe connecting fluid press pump 21.
Side plate 19 is provided with calibrate AE sensor 18, and calibrate AE sensor 18 is connected with CPU (central processing unit) 20.
Air inlet port 14 is provided with in seaming chuck 8, air inlet port 14 is communicated with carrier gas delivery pipe 45, carrier gas delivery pipe 45 connects two-way arm respectively by T-valve 42, wherein a road arm is provided with valve 43 and air compressor 44, another road arm is provided with successively valve 41, tensimeter 40, variable valve 39, reduction valve 38, valve 37 and is connected to the gas cylinder 36 of this arm end.
Duct 12 of giving vent to anger is provided with in push-down head 9, duct 12 of giving vent to anger is circumscribed with escape pipe 22, escape pipe 22 is connected with the first arm 24, second arm 23 by T-valve 26, wherein the first arm 24 connects emanometer 25, second arm 23 connects air collector 31, be provided with connecting pipe 35 between air collector 31 and emanometer 25, air collector 31 is provided with tensimeter 32; Escape pipe 22 is provided with valve 27, controls to give vent to anger the unlatching in duct 12 with closed by valve 27; Second arm 23 is provided with time arm 28, and secondary arm 28 is connected with vacuum pump 30, and secondary arm 28 is also provided with valve 29.Connecting pipe 35 is provided with gas outlet 33, and gas outlet 33 is provided with valve 34.
Triaxial apparatus adopts digital computing machine to control, its maximum axial is 1000KN, can realize Bit andits control, Deformation control and load and control three kinds of control modes, rate of deformation is adjustable within the scope of 0.01 ~ 100KN/s in 0.0001 ~ 1mm/s, rate of loading.Pressure chamber 1 is cylindrical, diameter 20cm, high 30cm; KJD-2000R type Continuous Instrument for Radon selected by emanometer 25, and it utilizes electrostatic collection radon decay daughter to carry out cumulative measurement, highly sensitive, on-the-spot acquisition result; Volume is little, easy to operate.Calibrate AE sensor 18 and CPU (central processing unit) 20 form coal petrography acoustic emission test system jointly, for collecting and recording the acoustic emission signal of coal petrography stand under load process.Acoustic emission signal can reflect propagation of internal cracks and cranny development situation in coal rock specimen stand under load process.The present embodiment coal petrography used acoustic emission test system is totally digitilized system, has ultrafast processing speed, superpower processing power and stability, can realize multi-channel parallel Acoustic emission signal processing and synchronous characteristics of Acoustic Emission parameter extraction and transient waveform record.
The radon gas utilizing said apparatus to carry out stand under load coal sample measures, and its step is as follows:
(1) get coal sample and make test specimen 6, the careful adhesion removing surface and the coal petrography easily dropped bits, be then placed in baking oven dry pre-service 4h at 110 ± 5 DEG C, take out coal sample, be placed in exsiccator and naturally cool to room temperature; Open the top board 2 of pressure chamber 1, have the test specimen 6 of heat-shrink tube 7 to be arranged between the seaming chuck 8 of triaxial apparatus and push-down head 9 in cover, be provided with porous plate 4 between seaming chuck 8 and test specimen 6, between push-down head 9 and test specimen 6, be provided with porous plate 5.Close oil-out 11, open exhausr port 13 and oil-in 10, open hydraulic pump 21 and be filled with oil for pressure chamber 1; When oil is full of, close exhausr port 13, close hydraulic pump 21.
(2) valve-off 34,41,43, Open valve 27,29, opens vacuum pump 30 pairs of systems and vacuumizes, observe a period of time, if pilot system negative pressure does not change, prove that the impermeability of device is good.Check out valve-off 27,29 after impermeability, control valve 43 or 41, open air compressor 44 or gas cylinder 36, continue to pass into carrier gas (air, CH in pilot system
4, N
2or CO
2).Valve-off 43 in the present embodiment, Open valve 41 and gas cylinder 36, for pilot system passes into CH4.
(3) after the 6 pairs of carrier gas of coal sample test specimen reach adsorption equilibrium, unlatching hydraulic cylinder 17 and hydraulic pump 21 apply confined pressure and axle pressure for test specimen 6, start calibrate AE sensor 18 and CPU (central processing unit) 20 simultaneously, start to record the acoustic emission signal in mensuration process.
(4) valve-off 29, opens valve 27, makes the gas in sample chamber enter in air collector 31 along sample chamber venthole 12; After air collector 31 gassy, valve-off 27, opens emanometer 25 and carries out radon gas mensuration; Valve 29 and vacuum pump 30 is opened, the waste gas in emptying air collector 31 after mensuration completes.
(5) coal sample test specimen is made again to reach adsorption equilibrium to carrier gas.
(6) step (4) and (5) is repeated, until test specimen destroys; Stop record acoustic emission signal.
(7) data analysis: the acoustic emission information collected under different loaded condition according to coal sample test specimen 6 and Radon eduction amount, propagation of internal cracks and the relation between degree of impairment and Radon eduction amount in coal sampling test specimen 6 stand under load process, draw the Phasic Rules of Radon eduction under coal sample loaded condition; Contrast the difference of the Radon eduction amount in different carrier gas Coal Under sample stand under load process, research and analyse coal sample rupture process Radon eduction to different methane gas response characteristic.
(8), after off-test, Open valve 34 carries out cleaned system.
Claims (5)
1. in stand under load coal rupture process, radon gas separates out determinator, and comprise triaxial apparatus, it is characterized in that, described triaxial apparatus comprises pressure chamber, and be provided with oil-in and oil-out bottom pressure chamber, top is provided with exhausr port; The heat-shrink tube being provided with seaming chuck, push-down head in pressure chamber and being vertically arranged between upper and lower pressure head, seaming chuck, push-down head and heat-shrink tube surround sample chamber jointly; Be provided with air inlet port in seaming chuck, be provided with duct of giving vent to anger in push-down head, described air inlet port is communicated with carrier gas delivery pipe, described in duct of giving vent to anger be connected with air collector, air collector is connected with emanometer; Described pressure chamber outer wall is provided with calibrate AE sensor, and calibrate AE sensor is connected with CPU (central processing unit).
2. in stand under load coal rupture process as claimed in claim 1, radon gas separates out determinator, it is characterized in that, described duct of giving vent to anger is circumscribed with escape pipe, escape pipe is connected with the first arm, the second arm by T-valve, wherein the first arm connects emanometer, second arm connects air collector, is provided with connecting pipe between air collector and emanometer; Escape pipe is provided with valve; First arm, the second arm or connecting pipe are arbitrary is provided with time arm; Described time arm is connected with vacuum pump, and secondary arm is provided with valve.
3. in stand under load coal rupture process as claimed in claim 2, radon gas separates out determinator, and it is characterized in that, described first arm, the second arm or connecting pipe are provided with gas outlet, and gas outlet is provided with valve.
4. in stand under load coal rupture process as claimed in claim 2 or claim 3, radon gas separates out determinator, and it is characterized in that, described carrier gas delivery pipe connects two-way arm respectively by T-valve, and wherein a road arm is provided with air compressor, and another road arm is connected with gas cylinder; Two-way arm is equipped with valve.
5. in stand under load coal rupture process as claimed in claim 4, radon gas separates out determinator, and it is characterized in that, described seaming chuck bottom, push-down head top are respectively equipped with porous plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420514784.5U CN204116333U (en) | 2014-09-05 | 2014-09-05 | In stand under load coal rupture process, radon gas separates out determinator |
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| CN201420514784.5U CN204116333U (en) | 2014-09-05 | 2014-09-05 | In stand under load coal rupture process, radon gas separates out determinator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655806A (en) * | 2015-03-03 | 2015-05-27 | 河南理工大学 | Method and device for testing energy change and permeability of nitrogen fracturing coal seam |
| CN110988231A (en) * | 2019-12-31 | 2020-04-10 | 哈尔滨工业大学（威海） | Device and method for researching gas in underwater wet welding hollow molten drop |
-
2014
- 2014-09-05 CN CN201420514784.5U patent/CN204116333U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104655806A (en) * | 2015-03-03 | 2015-05-27 | 河南理工大学 | Method and device for testing energy change and permeability of nitrogen fracturing coal seam |
| CN110988231A (en) * | 2019-12-31 | 2020-04-10 | 哈尔滨工业大学（威海） | Device and method for researching gas in underwater wet welding hollow molten drop |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20160905 |