CN103471975B - Experimental device for gas permeation under complex conditions - Google Patents
Experimental device for gas permeation under complex conditions Download PDFInfo
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- CN103471975B CN103471975B CN201310425725.0A CN201310425725A CN103471975B CN 103471975 B CN103471975 B CN 103471975B CN 201310425725 A CN201310425725 A CN 201310425725A CN 103471975 B CN103471975 B CN 103471975B
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Abstract
The invention discloses an experimental device for gas permeation under complex conditions. The experimental device is characterized by comprising a sealing loading box, a permeation test piece, a loading device, an oil pressure sealing system, a gas supplying system and a gas balancing system, wherein the loading device is used for loading the permeation test piece to enable the permeation test piece to be in a predetermined stress state; under the assistance of the oil pressure sealing system, a first pressure chamber comprises a rectangular frame, force transmission columns, side baffle plates and the outer side surface of the permeation test piece, and a second pressure chamber comprises the side baffle plates and the inner side surface of the permeation test piece; under the effect of gas pressure difference, gas in the first pressure chamber gradually permeates into the second pressure chamber, so that the permeation law of the gas around holes can be researched. The experimental device can be used for enabling coal and rock masses to be in a stress state similar to field conditions, and the influence of the breaking situations of the coal and rock masses around the holes in the permeation law can be considered, so that the experimental device has great significance on the research on the permeation, absorption and resolution law of the gas in the coal and rock masses around roadways under the complex conditions.
Description
Technical field
The present invention relates to the research of gas Percolation Law in coal seam in process of coal mining, particularly relate to a kind of complex condition gas permeation experimental provision.
Background technology
The stress of coal and rock, strain regime and cranny development rule have the impact of highly significant to its perviousness.Such as, after heading digging, original stress-strain state is broken, and excavation spatial peripheral produces obvious stress and concentrates.Surrouding rock stress is concentrated and a part of preexisting crack both can have been made to close, and can bring out again the how new crack of generation, new crack constantly expansion can make coal body more broken, around tunnel, form relaxation zone.Under the impact of relaxation zone, the gas in the surrounding medium of tunnel overflows in a large number, very easily causes tunnel gas to exceed standard, and causes gas explosion accident.
Because the complicacy of rule is overflowed in gas permeation around tunnel, a large amount of site tests and test cannot be carried out in project engineering stage, it may be necessary system simulation experiment and deep research is carried out, the affecting laws of each factor of quantitative test to factors such as coal mass strength and perviousness, gas pressure, pressure from surrounding rock and excavation sizes.
Also be not specifically designed to the experimental provision of research tunnel surrounding medium gas permeation rule at present, and the gas permeation rate proving installation of routine, no matter be three axles or single shaft, be all test specimen is processed into cylindrical or cube shaped, under making it be in homogeneous stress state by loading, and then test its permeability, can only uniform stress field be simulated, all fail to consider the stress that causes of roadway excavation concentrate and the complicated factor such as rock crusher on the impact of Percolation Law.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, a kind of complex condition gas permeation experimental provision is provided.
For achieving the above object, the present invention adopts following technical proposals:
A kind of complex condition gas permeation experimental provision, is characterized in that comprising sealing loads box, infiltration test specimen, charger, oil pressure sealing system, gas supply system and gas balanced system;
Described sealing loads box, mainly comprises rectangular frame, force-transmitting pole, loading cushion block and side shield; Described rectangular frame, a circular port is left in each side, and circular port surface is provided with rubber gasket; Described force-transmitting pole, through circular port, with circular port close contact, had both ensured that force-transmitting pole and rectangular frame relative motion can occur, had prevented gas overflowing again; Described loading cushion block, the surface contacted with test specimen is provided with the air slot intersected in length and breadth; Described side shield, comprise the first side shield and the second side shield, be separately fixed at the both sides, front and back of rectangular frame, its inside surface contacts with coal sample test specimen, each side shield inside surface reserves two rectangular channels, for accommodating O-ring seal, and on side shield reserved O-ring seal liquid injection port, the second side shield is also provided with gas filling orifice and gas portals;
Described infiltration test specimen, for rectangular structure, and the perforated holes of similar roadway shape is provided with in center, infiltration test specimen front and back sides scribbles 704 silicon rubber to ensure its impermeability, also scribbles lubricant to reduce to permeate the friction force in test piece deformation process and between side shield outside 704 silicon rubber;
Described oil pressure sealing system, comprises O-ring seal, hand-driven oil hydraulic pump, oil feed line and tensimeter; O-ring seal is ducted body, and can inject the fluent meterial of transmission of pressure in ducted body, O-ring seal builds compression molding by urethane rubber, and be arranged in the reserved rectangular channel of side shield inside surface, according to pressure gauge reading, manually oil pressure pump pressurizes to O-ring seal;
Described charger, comprises framework reaction beam, load cylinder, hydraulic power unit and high-pressure oil pipe; Load cylinder is fixed on framework reaction beam, and the force-transmitting pole being loaded box by sealing applies pressure with loading cushion block to infiltration test specimen, and the effect of hydraulic power unit and high-pressure oil pipe is load cylinder fuel feeding;
Described gas supply system, comprises gas supply tank, the first high-voltage tube, the first valve, gas pressure pump, the second high-voltage tube, the second valve, the first tensimeter, first-class gauge; Gas supply tank is connected by the first high-voltage tube with gas pressure pump, and is provided with the first valve on the first high-voltage tube; Gas pressure pump is connected by the second high-voltage tube with the gas filling orifice on cylindrical structure, and on the second high-voltage tube, be provided with the second valve, the first tensimeter and first-class gauge;
Described gas equilibrium system, comprises the first escape pipe, second gauge, the second tensimeter, the 3rd valve, vacuum pump, the second escape pipe, the 4th valve, gas storage tank; The sealing gas loaded on box side shield is portalled and to be connected by the first escape pipe with vacuum pump, and on the first escape pipe, be provided with second gauge, the second tensimeter, the 3rd valve; Vacuum pump is connected by the second escape pipe with gas storage tank, and on the second escape pipe, be provided with the 4th valve.
Test and data analysis to carry out more easily, the present invention can also comprise Measurement and Control System; Described Measurement and Control System, mainly comprises computing machine, Main Control Tank, data collecting instrument; Computing machine is connected with Main Control Tank by USB interface, Main Control Tank is connected with vacuum pump with data collecting instrument, vertical loading device, gas pressure pump by wire, and data collecting instrument is connected with second gauge by wire first tensimeter, first-class gauge, the second tensimeter.
Principle and advantage of the present invention is:
The present invention is loaded infiltration test specimen by charger, makes it reach predetermined stress; Oil pressure sealing system auxiliary under, the lateral surface of rectangular frame, force-transmitting pole, side shield and infiltration test specimen forms the first pressure chamber, and the medial surface of side shield and infiltration test specimen forms the second pressure chamber; Under the effect of gas pressure difference, the gas in the first pressure chamber is gradually to the second pressure chamber infiltration, thus the Percolation Law of research gas around circular opening.
Sealing of the present invention loads box and applies pressure by inner, and external structure forms the method for annular seal space, solves in Motion loading process the problem sealing difficulty in conjunction with oil pressure sealing system; The present invention can make coal and rock be in the stress of similar field condition, can consider that around hole, the broken situation of coal and rock is on the impact of Percolation Law; It is simple that the present invention also has structure, the feature that experimentation cost is low, for gas in coal and rock around complex condition tunnel infiltration, adsorb, to analyse the research of separating rule significant.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and embodiment, the invention will be further described:
Fig. 1 is mechanics principle figure of the present invention;
Fig. 2 is agent structure schematic diagram of the present invention.
Embodiment
By reference to the accompanying drawings 1 and 2, a kind of complex condition gas permeation experimental provision, is characterized in that comprising sealing loads box, infiltration test specimen, charger, oil pressure sealing system, gas supply system, gas equilibrium system and Measurement and Control System.
Described sealing loads box, mainly comprises rectangular frame 1, force-transmitting pole 2, loads cushion block 3 and side shield 4; Described rectangular frame 1, a circular port is left in each side, and circular port surface is provided with rubber gasket; Described force-transmitting pole 2, through circular port, with circular port close contact, had both ensured that force-transmitting pole and rectangular frame relative motion can occur, had prevented gas overflowing again; Described loading cushion block 3, the surface contacted with test specimen is provided with the air slot intersected in length and breadth; Described side shield 4, comprise the first side shield and the second side shield, be separately fixed at the both sides, front and back of rectangular frame, its inside surface contacts with coal sample test specimen, each side shield inside surface reserves two rectangular channel 4a, for accommodating O-ring seal, and on side shield reserved O-ring seal liquid injection port, the second side shield is also provided with gas filling orifice 4b and gas and portals 4c.
Described infiltration test specimen 5, for rectangular structure, and the perforated holes of similar roadway shape is provided with in center, hole scope is less than the scope of less rectangular channel, infiltration test specimen front and back sides scribbles 704 silicon rubber to ensure its impermeability, also scribbles lubricant to reduce to permeate the friction force in test piece deformation process and between side shield outside 704 silicon rubber.
Described oil pressure sealing system, comprises O-ring seal, hand-driven oil hydraulic pump, oil feed line and tensimeter; O-ring seal is ducted body, and can inject the fluent meterial of transmission of pressure in ducted body, O-ring seal builds compression molding by urethane rubber, and be arranged in the reserved rectangular channel of side shield inside surface, according to pressure gauge reading, manually oil pressure pump pressurizes to O-ring seal.
Described charger, comprises framework reaction beam 6, load cylinder 7, hydraulic power unit and high-pressure oil pipe; Load cylinder 6 is fixed on framework reaction beam, and the force-transmitting pole 2 being loaded box by sealing applies pressure with loading cushion block 3 to infiltration test specimen 5, and the effect of hydraulic power unit and high-pressure oil pipe is load cylinder fuel feeding.
Described gas supply system, comprises gas supply tank, the first high-voltage tube, the first valve, gas pressure pump, the second high-voltage tube, the second valve, the first tensimeter, first-class gauge; Gas supply tank is connected by the first high-voltage tube with gas pressure pump, and is provided with the first valve on the first high-voltage tube; Gas pressure pump is connected by the second high-voltage tube with the gas filling orifice on cylindrical structure, and on the second high-voltage tube, be provided with the second valve, the first tensimeter and first-class gauge.
Described gas equilibrium system, comprises the first escape pipe, second gauge, the second tensimeter, the 3rd valve, vacuum pump, the second escape pipe, the 4th valve, gas storage tank; The sealing gas loaded on box side shield is portalled and to be connected by the first escape pipe with vacuum pump, and on the first escape pipe, be provided with second gauge, the second tensimeter, the 3rd valve; Vacuum pump is connected by the second escape pipe with gas storage tank, and on the second escape pipe, be provided with the 4th valve.
Described Measurement and Control System, mainly comprises computing machine, Main Control Tank, data collecting instrument; Computing machine is connected with Main Control Tank by USB interface, Main Control Tank is connected with vacuum pump with data collecting instrument, vertical loading device, gas pressure pump by wire, and data collecting instrument is connected with second gauge by wire first tensimeter, first-class gauge, the second tensimeter.
The above embodiment, the just one of the embodiment that the present invention is more preferably concrete, the usual change that those skilled in the art carries out within the scope of technical solution of the present invention and replacement all should be included in protection scope of the present invention.
Claims (2)
1. a complex condition gas permeation experimental provision, is characterized in that: comprise sealing and load box, infiltration test specimen, charger, oil pressure sealing system, gas supply system and gas balanced system;
Described sealing loads box, mainly comprises rectangular frame, force-transmitting pole, loading cushion block and side shield; Described rectangular frame, a circular port is left in each side, and circular port surface is provided with rubber gasket; Described force-transmitting pole passes circular port, with circular port close contact; Described loading cushion block, the surface contacted with test specimen is provided with the air slot intersected in length and breadth; Described side shield, comprises the first side shield and the second side shield, is separately fixed at the both sides, front and back of rectangular frame, and each side shield inside surface reserves two rectangular channels, the second side shield is also provided with gas filling orifice and gas portals;
Described infiltration test specimen, is rectangular structure, and is provided with the perforated holes of similar roadway shape in center, and infiltration test specimen front and back sides scribbles 704 silicon rubber, also scribbles lubricant outside 704 silicon rubber;
Described oil pressure sealing system, comprises O-ring seal, hand-driven oil hydraulic pump, oil feed line and tensimeter; O-ring seal is ducted body, can inject the fluent meterial of transmission of pressure in ducted body, is arranged in the reserved rectangular channel of side shield inside surface;
Described charger, comprises framework reaction beam, load cylinder, hydraulic power unit and high-pressure oil pipe; Load cylinder is fixed on framework reaction beam, and the force-transmitting pole being loaded box by sealing applies pressure with loading cushion block to infiltration test specimen, and the effect of hydraulic power unit and high-pressure oil pipe is load cylinder fuel feeding;
Described gas supply system, comprises gas supply tank, the first high-voltage tube, the first valve, gas pressure pump, the second high-voltage tube, the second valve, the first tensimeter, first-class gauge; Gas supply tank is connected by the first high-voltage tube with gas pressure pump, and is provided with the first valve on the first high-voltage tube; Gas pressure pump is connected by the second high-voltage tube with the gas filling orifice on cylindrical structure, and on the second high-voltage tube, be provided with the second valve, the first tensimeter and first-class gauge;
Described gas equilibrium system, comprises the first escape pipe, second gauge, the second tensimeter, the 3rd valve, vacuum pump, the second escape pipe, the 4th valve, gas storage tank; The sealing gas loaded on box side shield is portalled and to be connected by the first escape pipe with vacuum pump, and on the first escape pipe, be provided with second gauge, the second tensimeter, the 3rd valve; Vacuum pump is connected by the second escape pipe with gas storage tank, and on the second escape pipe, be provided with the 4th valve.
2. a kind of complex condition gas permeation experimental provision according to claim 1, is characterized in that comprising Measurement and Control System; Described Measurement and Control System, mainly comprises computing machine, Main Control Tank, data collecting instrument; Computing machine is connected with Main Control Tank by USB interface, Main Control Tank is connected with vacuum pump with data collecting instrument, vertical loading device, gas pressure pump by wire, and data collecting instrument is connected with second gauge with the first tensimeter, first-class gauge, the second tensimeter by wire.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310425725.0A CN103471975B (en) | 2013-09-18 | 2013-09-18 | Experimental device for gas permeation under complex conditions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310425725.0A CN103471975B (en) | 2013-09-18 | 2013-09-18 | Experimental device for gas permeation under complex conditions |
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| CN103471975A CN103471975A (en) | 2013-12-25 |
| CN103471975B true CN103471975B (en) | 2015-07-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104865177B (en) * | 2015-06-18 | 2017-10-24 | 重庆大学 | A kind of two-dimentional crack rock shearing seepage instrument of large scale |
| CN105606461B (en) * | 2015-12-30 | 2019-08-30 | 北京工业大学 | Liftable loading mechanism and the shear-seepage coupling test device for applying it |
| CN105547863B (en) * | 2016-01-18 | 2019-04-16 | 北京工业大学 | Multidirectional sample presentation component and the two-dimentional rock sample seepage flow test device for applying it |
| CN105486623B (en) * | 2016-01-18 | 2019-04-16 | 北京工业大学 | Two-dimentional rock sample seepage flow test device |
| CN106596373A (en) * | 2016-12-16 | 2017-04-26 | 平安煤炭开采工程技术研究院有限责任公司 | Testing device for gassy seam |
| CN106840996B (en) * | 2016-12-23 | 2020-09-08 | 黑龙江科技大学 | Coal body permeability measuring device influenced by mining and using method thereof |
| CN113281234B (en) * | 2021-05-14 | 2023-09-01 | 河南工程学院 | Coal dust gas diffusion seepage flow measuring device |
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| FR2661990B1 (en) * | 1990-05-09 | 1992-07-24 | Inst Francais Du Petrole | METHOD AND DEVICE FOR MEASURING THE ADSORPTION AND DESORPTION OF A GAS ABSORBED BY A SOLID SAMPLE AS WELL AS ITS USE. |
| CN201974356U (en) * | 2011-03-18 | 2011-09-14 | 西安科技大学 | Permeability testing device for similar materials |
| CN102735600B (en) * | 2012-07-05 | 2014-10-29 | 重庆大学 | Method for testing coal sample seepage under true triaxial state |
| CN102901803B (en) * | 2012-10-24 | 2014-10-08 | 河南理工大学 | Water-gas different adsorption-desorption-seepage experimental method for loaded coal containing methane |
| CN203455263U (en) * | 2013-09-18 | 2014-02-26 | 山东科技大学 | Gas permeation experiment device under complex conditions |
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