CN103743665A - Loading device for simulating stress of coal rock - Google Patents
Loading device for simulating stress of coal rock Download PDFInfo
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- CN103743665A CN103743665A CN201410005525.4A CN201410005525A CN103743665A CN 103743665 A CN103743665 A CN 103743665A CN 201410005525 A CN201410005525 A CN 201410005525A CN 103743665 A CN103743665 A CN 103743665A
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Abstract
The invention discloses a loading device for simulating stress of coal rock. The device comprises a strike bar, a pressurizing oil cylinder, a balancing oil cylinder, an incident rod and a transmitting rod, wherein an oil cylinder support is arranged at the bottom of the pressurizing oil cylinder, a confining pressure chamber is arranged at the center of the pressurizing oil cylinder, a coal rock test piece is placed in the center of the confining pressure chamber, a steel jacket is arranged at the periphery of the coal rock test piece, the incident rod and the transmitting rod clamp the steel jacket on the coal rock test piece, stress pieces are arranged on the incident rod and the transmitting rod or stress pieces are arranged on the coal rock test piece, an oil pipe connector is arranged at the bottom of the pressurizing oil cylinder, the oil pipe connector is connected with an oil pipe which is respectively connected to the balancing oil cylinder and a hydraulic manual pump through a diverter, and a one-way valve is arranged on the oil pipe and close to the balancing oil cylinder. The stress condition of the deep underground coal rock layer is truly restored by means of applying a three-dimensional pressure to the coal rock test pipe through the pressurizing oil cylinder and using the strike rod to strike the incident rod to axially apply a pressure to the coal rock test pipe, so that performance parameters of the deep underground coal rock layer are precisely researched.
Description
Technical field
The present invention relates to a kind of experiment equipment, particularly a kind of stressed charger of coal petrography of simulating.
Background technology
At present in the stressed analog loading device of coal rock layer, the lances that adopt directly clash into the force-bearing situation that incident bar is determined coal rock layer more, but in dark underground coal rock layer, coal rock layer is not only subject to three-dimensional pressure, also be subject to other pressure, such as high hydraulic pressure, gas air pressure, high-temperature, and current experimental provision cannot join these pressure in simulated environment, causes the inaccurate of simulated environment.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of simulation coal petrography and is subject to force loading device, and this device can real simulation subsurface pressure environment.
For achieving the above object, the invention provides following technical scheme: a kind of simulation coal petrography is subject to force loading device, comprise lance, the oil cylinder of exerting pressure, balanced oil cylinder, incident bar and transmission bar, the exert pressure bottom of oil cylinder arranges cylinder support, lance is arranged at incident bar away from one end of the oil cylinder of exerting pressure, the center of lance and the center of incident bar are in same level and in same straight line, the exert pressure two ends of oil cylinder arrange flange, the exert pressure center of oil cylinder arranges confined pressure chamber, coal rock specimen is placed in the center in confined pressure chamber, the periphery of coal rock specimen arranges steel bushing, one end of incident bar is positioned in confined pressure chamber, the other end of incident bar is positioned in bearing, one end of transmission bar is positioned in the other end in confined pressure chamber, the other end of transmission bar is positioned in another bearing, incident bar and transmission bar are clamped the two ends of coal rock specimen steel bushing, the diameter of incident bar and transmission bar is slightly smaller than the diameter in confined pressure chamber, on incident bar and transmission bar, foil gauge is set, or foil gauge is set on coal rock specimen, foil gauge is connected to data handling system, incident bar, transmission bar, the center of the steel bushing of coal rock specimen is in same level and in same straight line, the exert pressure bottom of oil cylinder is provided with tubing interface, tubing interface connects an oil pipe, oil pipe is connected respectively to balanced oil cylinder and hydraulic hand pump by shunt, oil pipe arranges retaining valve in the position near balanced oil cylinder, on described retaining valve, tensimeter is set.
Preferably, incident bar and transmission bar adopt Hopkinson bar.
Preferably, the periphery of coal rock specimen parcel rubber sleeve, is filled with gases at high pressure in rubber sleeve, and rubber sleeve periphery is wrapped up by steel bushing.
Preferably, the junction of incident bar, transmission bar and bearing arranges respectively butterfly spring.
Preferably, the bearing being connected with transmission bar is provided with cushion cylinder in the one end away from the oil cylinder of exerting pressure.
Preferably, exert pressure in oil cylinder heater strip is set.
Preferably, the exert pressure top of oil cylinder arranges surplus valve.
Preferably, the exert pressure top of oil cylinder is provided with aerator, aerator comprises draft tube and two escape pipes, one end of draft tube is connected to gases at high pressure delivery outlet, the other end of draft tube connects two escape pipes by gas diverter, and the gas outlet of escape pipe is arranged in the steel bushing of coal rock specimen.
Preferably, in draft tube, be provided with a variable valve.
Adopt technique scheme, the present invention is applied three-dimensional pressure and uses lance to clash into incident bar simultaneously to coal rock specimen by the oil cylinder of exerting pressure and applies axle pressure to coal rock specimen, truly reduced the force-bearing situation of dark underground mining coal rock layer, be the impulsive force of the suffered three-dimensional pressure of coal rock layer and exploitation instrument, more accurate to the performance parameter research of dark underground coal rock layer.Meanwhile, apparatus of the present invention both can be done quasi-static experiment, also can do dynamic experiment, had solved the trouble that same equipment can not be done two kinds of experiments.
Incident bar and transmission bar adopt Hopkinson bar, are convenient to calculate the performance parameter of coal rock specimen; The periphery parcel rubber sleeve of coal rock specimen, is filled with gases at high pressure in rubber sleeve, rubber sleeve periphery is wrapped up by steel bushing, and pressure when coal rock specimen simulation is wrapped up by methane gas reduces the state of dark underground coal rock layer; The junction of incident bar, transmission bar and bearing arranges respectively butterfly spring, and the bearing being connected with transmission bar is provided with cushion cylinder in the one end away from the oil cylinder of exerting pressure, and avoids the stressed coal rock specimen that makes when excessive of incident bar and transmission bar broken and destroy oil cylinder; Exert pressure in oil cylinder heater strip is set, can make the dark underground temperature environment of equipment simulating; The exert pressure top of oil cylinder arranges surplus valve, can open surplus valve and carry out pressure release when pressure surpasses setting when testing, and avoids destroying oil cylinder; The exert pressure top of oil cylinder is provided with aerator, aerator comprises draft tube and two escape pipes, one end of draft tube is connected to gases at high pressure delivery outlet, the other end of draft tube connects two escape pipes by gas diverter, the gas outlet of escape pipe is arranged in the steel bushing of coal rock specimen, can make the hyperbaric environment of the dark underground environment of equipment simulating; In draft tube, be provided with a variable valve, avoid gases at high pressure to enter steel bushing fast and make device fails.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the exert pressure structural representation of oil cylinder of the present invention;
Fig. 3 is the structural representation of aerator of the present invention;
Fig. 4 is the wiring layout of aerator of the present invention and the oil cylinder of exerting pressure.
Wherein, 1. lance 2. balanced oil cylinder 4. incident bar 5. transmission bar 6. confined pressure chamber 7. coal rock specimen 8. cylinder support 9. bearing 10. tubing interface 11. oil pipe 12. tensimeter 13. hydraulic hand pump 14. butterfly spring 15. cushion cylinder 16. heater strip 17. aerator 18. draft tube 19. escape pipe 20. variable valve of oil cylinder 3. of exerting pressure.
Embodiment
Below in conjunction with accompanying drawing, by the description to embodiment, the present invention will be further described:
As Fig. 1, Fig. 2, shown in Fig. 3 and Fig. 4, the present invention simulates coal petrography and is subject to force loading device, comprise lance 1, the oil cylinder 2 of exerting pressure, balanced oil cylinder 3, incident bar 4 and transmission bar 5, incident bar 4 adopts Hopkinson bar with transmission bar 5, lance 1 is arranged at incident bar 4 away from one end of the oil cylinder 2 of exerting pressure, the center of the center of lance 1 and incident bar 4 is in same level and in same straight line, the exert pressure bottom of oil cylinder 2 arranges cylinder support 8, the interior heater strip 16 that arranges of the oil cylinder 2 of exerting pressure, the exert pressure top of oil cylinder 2 arranges surplus valve, the exert pressure two ends of oil cylinder 2 arrange flange, the exert pressure center of oil cylinder 2 arranges confined pressure chamber 6, coal rock specimen 7 is placed in the center in confined pressure chamber 6, the periphery parcel rubber sleeve of coal rock specimen 7, in rubber sleeve, be filled with gases at high pressure, rubber sleeve periphery is wrapped up by steel bushing, one end of incident bar 4 is positioned in confined pressure chamber 6, the other end of incident bar 4 is positioned in bearing 9, one end of transmission bar 5 is positioned in the other end in confined pressure chamber 6, the other end of transmission bar 5 is positioned in another bearing 9, the two ends of incident bar 4 and transmission bar 5 double team coal rock specimen 7 steel bushings, the diameter of incident bar 4 and transmission bar 5 is slightly smaller than the diameter in confined pressure chamber 6, incident bar 4, transmission bar 5 arranges respectively butterfly spring 14 with the junction of bearing 9, the bearing 9 being connected with transmission bar 5 is provided with cushion cylinder 15 in the one end away from the oil cylinder 2 of exerting pressure, on incident bar 4 and transmission bar 5, foil gauge is set, or on coal rock specimen 7, foil gauge is set, foil gauge is connected to data handling system, incident bar 4, transmission bar 5, the center of the steel bushing of coal rock specimen 7 is in same level and in same straight line, the exert pressure bottom of oil cylinder 2 is provided with tubing interface 10, tubing interface 10 connects an oil pipe 11, oil pipe 11 is connected respectively to balanced oil cylinder 3 and hydraulic hand pump 13 by shunt, oil pipe 11 arranges retaining valve in the position near balanced oil cylinder 3, tensimeter 12 is set on retaining valve, the exert pressure top of oil cylinder 2 is provided with aerator 17, aerator 17 comprises draft tube 18 and two escape pipes 19, one end of draft tube 18 is connected to gases at high pressure delivery outlet, the other end of draft tube 18 connects two escape pipes 19 by gas diverter, the gas outlet of escape pipe 19 is arranged in the steel bushing of coal rock specimen 7, in draft tube 18, be provided with a variable valve 20.
Adopt technique scheme, by pulling the hand switch of hydraulic hand pump 13, from balanced oil cylinder 3, extract fluid, by hydraulic hand pump 13, to fluid, pressurize again, to applying oil cylinder 2 fuel feeding, owing to being provided with retaining valve near on the oil pipe 11 of balanced oil cylinder 3, at hydraulic hand pump 13 fluid when exerting pressure oil cylinder 2 fuel feeding, can not be back in balanced oil cylinder 3, the oil cylinder 2 of exerting pressure applies three-dimensional pressure and uses lance 1 to clash into incident bar 4 simultaneously to coal rock specimen 7 and applies axle pressure to coal rock specimen 7, truly reduced the force-bearing situation of dark underground coal rock layer, make people more accurate to the performance parameter research of dark underground coal rock layer.Meanwhile, apparatus of the present invention both can be done quasi-static experiment, also can do dynamic experiment, had solved the trouble that same equipment can not be done two kinds of experiments.
When carrying out quasi-static experiment, only need on coal rock specimen 7, foil gauge be installed, then by lance 1, slowly push incident bar 4, record the data that the foil gauge on coal rock specimen 7 produces, directly draw the rate of strain of coal rock specimen 7; While carrying out dynamic experiment, because needs are used lance 1 high-speed impact incident bar 4, if directly foil gauge is arranged on coal rock specimen 7, easily make foil gauge moment fragmentation, therefore foil gauge is arranged on incident bar 4 and transmission bar 5, by recording the rate of strain of incident bar 4 and transmission bar 5, then by calculating the rate of strain of coal rock specimen 7.By quasi-static experiment and dynamic experiment, can draw the strain of coal rock specimen 7 under different stresses, thereby determine the technical parameter of coal rock layer when dark underground mining.
For incident bar 4 and transmission bar 5 after guarantee clashing into can only move by along continuous straight runs, can between oil cylinder 2 and two bearings 9, guide rail be set exerting pressure.
It may be noted that, the center of the center of lance 1 and incident bar 4 is in same level and in same straight line, refer to that lance 1 is when clashing into incident bar 4, the center superposition of the center of lance 1 and incident bar 4, guarantees power evenly transmission on incident bar 4 that lance 1 produces while clashing into incident bar 4.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise of the invention, can also make some distortion and improvement, and these all belong to protection scope of the present invention.
Claims (9)
1. a simulation coal petrography is subject to force loading device, comprise lance (1), the oil cylinder (2) of exerting pressure, balanced oil cylinder (3), incident bar (4) and transmission bar (5), the exert pressure bottom of oil cylinder (2) arranges cylinder support (8), lance (1) is arranged at incident bar (4) away from one end of the oil cylinder of exerting pressure (2), the center of the center of described lance (1) and incident bar (4) is in same level and in same straight line, it is characterized in that: described in the exert pressure two ends of oil cylinder (2) flange is set, the exert pressure center of oil cylinder (2) arranges confined pressure chamber (6), coal rock specimen (7) is placed in the center in described confined pressure chamber (6), the periphery of described coal rock specimen (7) arranges steel bushing, one end of incident bar (4) is positioned in confined pressure chamber (6), the other end of incident bar (4) is positioned in bearing (9), one end of transmission bar (5) is positioned in the other end of confined pressure chamber (6), the other end of transmission bar (5) is positioned in another bearing (9), the two ends that described incident bar (4) and transmission bar (5) are clamped coal rock specimen (7) steel bushing, the diameter of incident bar (4) and transmission bar (5) is slightly smaller than the diameter of confined pressure chamber (6), on described incident bar (4) and transmission bar (5), foil gauge is set, or on coal rock specimen (7), foil gauge is set, foil gauge is connected to data handling system, incident bar (4), transmission bar (5), the center of the steel bushing of coal rock specimen (7) is in same level and in same straight line, the bottom of the described oil cylinder of exerting pressure (2) is provided with tubing interface (10), tubing interface (10) connects an oil pipe (11), oil pipe (11) is connected respectively to balanced oil cylinder (3) and hydraulic hand pump (13) by shunt, oil pipe (11) arranges retaining valve in the position near balanced oil cylinder (3), tensimeter (12) is set on described retaining valve.
2. simulation coal petrography according to claim 1 is subject to force loading device, it is characterized in that: described incident bar (4) adopts Hopkinson bar with transmission bar (5).
3. simulation coal petrography according to claim 1 is subject to force loading device, it is characterized in that: the periphery parcel rubber sleeve of described coal rock specimen (7), in rubber sleeve, be filled with gases at high pressure, and rubber sleeve periphery is wrapped up by steel bushing.
4. simulation coal petrography according to claim 1 is subject to force loading device, it is characterized in that: described incident bar (4), transmission bar (5) arrange respectively butterfly spring (14) with the junction of bearing (9).
5. simulation coal petrography according to claim 4 is subject to force loading device, it is characterized in that: the described bearing (9) being connected with transmission bar (5) is provided with cushion cylinder (15) in the one end away from the oil cylinder of exerting pressure (2).
6. simulation coal petrography according to claim 1 is subject to force loading device, it is characterized in that: described in exert pressure in oil cylinder (2) heater strip (16) be set.
7. simulation coal petrography according to claim 6 is subject to force loading device, it is characterized in that: the top of the described oil cylinder of exerting pressure (2) arranges surplus valve.
8. simulation coal petrography according to claim 7 is subject to force loading device, it is characterized in that: described in the exert pressure top of oil cylinder (2) be provided with aerator (17), described aerator (17) comprises draft tube (18) and two escape pipes (19), one end of draft tube (18) is connected to gases at high pressure delivery outlet, the other end of draft tube (18) connects two escape pipes (19) by gas diverter, and the gas outlet of escape pipe (19) is arranged in the steel bushing of coal rock specimen (7).
9. simulation coal petrography according to claim 8 is subject to force loading device, it is characterized in that: in described draft tube (18), be provided with a variable valve (20).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410005525.4A CN103743665A (en) | 2014-01-06 | 2014-01-06 | Loading device for simulating stress of coal rock |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410005525.4A CN103743665A (en) | 2014-01-06 | 2014-01-06 | Loading device for simulating stress of coal rock |
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| CN201410005525.4A Pending CN103743665A (en) | 2014-01-06 | 2014-01-06 | Loading device for simulating stress of coal rock |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526133A (en) * | 2016-12-08 | 2017-03-22 | 贵州大学 | Large three-dimensional dynamic load mineral similar material physical test platform |
| CN108766178A (en) * | 2018-05-30 | 2018-11-06 | 西安科技大学 | A kind of large-inclination-angle coal bed holder and Surrounding Rock System four-dimension physical simulation experiment platform |
| CN108801900A (en) * | 2018-06-29 | 2018-11-13 | 中国神华能源股份有限公司 | It is bent Mud lubricity detection device and method inside tubing string |
| CN108871931A (en) * | 2018-06-05 | 2018-11-23 | 清华大学 | A kind of flange form SHPB filling liquid jointed rock mass liquid sample bringing device and method |
| CN109915139A (en) * | 2019-04-01 | 2019-06-21 | 安徽理工大学 | Balanced energy induced plasticity destroys and prevents and treats the hard coal seam recovery method and experimental provision of power destruction |
| CN110082228A (en) * | 2019-02-18 | 2019-08-02 | 中国矿业大学(北京) | A kind of the Hopkinson impact experiment apparatus and method of coal containing methane gas |
| CN112268806A (en) * | 2020-10-14 | 2021-01-26 | 合肥工业大学 | Confining pressure loading device based on separated Hopkinson pressure bar |
| CN112414847A (en) * | 2020-11-09 | 2021-02-26 | 华北科技学院 | Horizontal grading loading device for analog simulation experiment rack |
| CN113281175A (en) * | 2021-04-23 | 2021-08-20 | 中南大学 | Device and method for testing dynamic mechanical properties of rock in gas-solid coupling state |
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| CN202837089U (en) * | 2012-09-29 | 2013-03-27 | 张磊 | Confinement cylinder device of Hopkinson pressure bar active confinement experiment |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106526133A (en) * | 2016-12-08 | 2017-03-22 | 贵州大学 | Large three-dimensional dynamic load mineral similar material physical test platform |
| CN108766178A (en) * | 2018-05-30 | 2018-11-06 | 西安科技大学 | A kind of large-inclination-angle coal bed holder and Surrounding Rock System four-dimension physical simulation experiment platform |
| CN108766178B (en) * | 2018-05-30 | 2023-05-16 | 西安科技大学 | Four-dimensional physical simulation experiment platform for large-dip-angle coal seam support and surrounding rock system |
| CN108871931A (en) * | 2018-06-05 | 2018-11-23 | 清华大学 | A kind of flange form SHPB filling liquid jointed rock mass liquid sample bringing device and method |
| CN108801900A (en) * | 2018-06-29 | 2018-11-13 | 中国神华能源股份有限公司 | It is bent Mud lubricity detection device and method inside tubing string |
| CN110082228A (en) * | 2019-02-18 | 2019-08-02 | 中国矿业大学(北京) | A kind of the Hopkinson impact experiment apparatus and method of coal containing methane gas |
| CN109915139A (en) * | 2019-04-01 | 2019-06-21 | 安徽理工大学 | Balanced energy induced plasticity destroys and prevents and treats the hard coal seam recovery method and experimental provision of power destruction |
| CN112268806A (en) * | 2020-10-14 | 2021-01-26 | 合肥工业大学 | Confining pressure loading device based on separated Hopkinson pressure bar |
| CN112268806B (en) * | 2020-10-14 | 2023-04-14 | 合肥工业大学 | Confining pressure loading device based on separated Hopkinson pressure bar |
| CN112414847A (en) * | 2020-11-09 | 2021-02-26 | 华北科技学院 | Horizontal grading loading device for analog simulation experiment rack |
| CN112414847B (en) * | 2020-11-09 | 2022-09-16 | 华北科技学院 | Horizontal grading loading device for analog simulation experiment rack |
| CN113281175A (en) * | 2021-04-23 | 2021-08-20 | 中南大学 | Device and method for testing dynamic mechanical properties of rock in gas-solid coupling state |
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Application publication date: 20140423 |