CN104819921A - Large-size rock fracture permeability test system and measuring method thereof - Google Patents

Large-size rock fracture permeability test system and measuring method thereof Download PDF

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Publication number
CN104819921A
CN104819921A CN201510193543.4A CN201510193543A CN104819921A CN 104819921 A CN104819921 A CN 104819921A CN 201510193543 A CN201510193543 A CN 201510193543A CN 104819921 A CN104819921 A CN 104819921A
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CN
China
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water
cap
rock fracture
rock
infiltration
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CN201510193543.4A
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Chinese (zh)
Inventor
钟振
胡云进
郜会彩
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绍兴文理学院
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Priority to CN201510193543.4A priority Critical patent/CN104819921A/en
Publication of CN104819921A publication Critical patent/CN104819921A/en

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Abstract

The invention relates to a large-size rock fracture permeability test system and a measuring method thereof. The large-size rock fracture permeability test system comprises a self-circulation water supply tank, a constant-pressure water tank, a water inlet end cap, a water outlet end cap, a horizontal rock fracture, pitot piezometer tubes and a constant water head water collecting system, the self-circulation water supply tank is connected with the constant-pressure water tank through a water supply tube and a water return tube, the water inlet end cap is connected on the constant-pressure water tank, two ends of the horizontal rock fracture are abutted to the water inlet end cap and the water outlet end cap respectively, the pitot piezometer tubes are arranged on the water inlet end cap and the water outlet end cap respectively, and the constant water head water collecting system is connected with the water outlet end cap. The large-size rock fracture permeability test system is simple in structure, convenient to operate and high in test accuracy and can make permeability test research on rock fractures with series of sizes (10cm*10cm-100cm*100cm), and change laws of rock fracture permeability changing along with the sizes of the fractures are analyzed.

Description

A kind of large scale rock crack infiltration experiment system and measuring method thereof
Technical field
The present invention relates to a kind of infiltration experiment system and measuring method thereof, be specifically related to a kind of large scale rock crack infiltration experiment system and measuring method thereof, belong to crack rock hydraulics test technical field.
Background technology
There is size effect in the perviousness in crack, and increases with the increase of slot dimensions.Small size crack permeability test often underestimates the perviousness of crack reality, but because small size permeability test cost is low, simple to operation, therefore the perviousness studying crack is often used to, this reduces reliability and the using value of achievement in research to a certain extent, infiltrative change from small size to large scale process, be not simple by the problem of infiltration coefficient Linear Amplifer, the influence factor wherein related to is numerous, control mechanism is not yet clear, is a complicated change procedure.
But limit by various objective condition, particularly be subject to the restriction of sample making technology and existing testing equipment, the specimen size of crack permeability test research is relatively single, and size less (diameter is no more than 30cm), so far, yet there are no the report closing serial yardstick rock fracture permeability test.
Therefore, for solving the problems of the technologies described above, necessary large scale rock crack infiltration experiment system and the measuring method thereof providing a kind of innovation, to overcome described defect of the prior art.
Summary of the invention
For solving the problem, the object of the present invention is to provide a kind of large scale rock crack infiltration experiment system, with the evolution process of eye slit perviousness with its change in size, analyzing infiltration coefficient size effect rule, exploring the control mechanism of size effect.
Another object of the present invention is to the measuring method that a kind of large scale rock crack infiltration experiment system is provided.
For realizing above-mentioned first object, the technical scheme that the present invention takes is: a kind of large scale rock crack infiltration experiment system, and it comprises self-loopa supply tank, constant pressure water tank, water inlet end cap, water delivering orifice end cap, horizontal rock fracture, Pitot tube piezometric tube and determines head water gathering system; Wherein, be connected with a return pipe by a feed pipe between described self-loopa supply tank and constant pressure water tank; Described water inlet end cap is connected on constant pressure water tank; The two ends of described horizontal rock fracture have abutted described inlet end cap and water delivering orifice end cap respectively; Described Pitot tube piezometric tube is arranged on water inlet end cap, water delivering orifice end cap respectively; Describedly determine head water gathering system and be connected with water delivering orifice end cap.
Large scale rock crack of the present invention infiltration experiment system is set to further: described self-loopa supply tank is provided with flowrate control valve.
Large scale rock crack of the present invention infiltration experiment system is set to further: be provided with water stabling aperture board in described constant pressure water tank, water stabling aperture board is provided with steady water hole, and the top of described constant pressure water tank is provided with overflow plate.
Large scale rock crack of the present invention infiltration experiment system is set to further: the seam crossing silicon rubber sealing of described horizontal rock fracture and water inlet end cap, water delivering orifice end cap.
Large scale rock crack of the present invention infiltration experiment system is also set to: the planar dimension of described water inlet end cap, water delivering orifice end cap is 120cm × 120cm.
For realizing above-mentioned second object, the technical scheme that the present invention takes is: the measuring method of a kind of large scale rock crack infiltration coefficient, it comprises the steps:
1), water inlet end cap, water delivering orifice end cap are arranged on the two ends of horizontal rock fracture;
2), to horizontal rock fracture water filling, to get rid of gas in crack;
3), apply infiltration hydraulic pressure, by Pitot tube piezometric tube measure rock fracture import water pressure ( ) and go out water pressure ( );
4), by determine head water gathering system measure rock fracture inflow-rate of water turbine ( );
5), according to cubic law, the infiltration coefficient of rock fracture is by following formulae discovery:
In formula: for the infiltration coefficient of rock fracture; for acceleration of gravity.
The measuring method of large scale rock crack of the present invention infiltration coefficient further for: described in for fracture opening is ; Wherein, for the water movement coefficient of viscosity; , be respectively width and the length of rock fracture.
Compared with prior art, the present invention has following beneficial effect: structure of the present invention is simple, easy to operate, can realize carrying out the research of array of sizes (10cm × 10cm ~ 100 cm × 100cm) rock fracture permeability test, analyze the rule that rock fracture perviousness changes with slot dimensions, test accuracy is higher.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of large scale rock crack of the present invention infiltration experiment system.
Embodiment
Refer to shown in Figure of description 1, the present invention is a kind of large scale rock crack infiltration experiment system, and it is by self-loopa supply tank 1, constant pressure water tank 4, water inlet end cap 8, water delivering orifice end cap 10, horizontal rock fracture 9, Pitot tube piezometric tube 11 and determine several parts such as head water gathering system 12 and form.
Wherein, be connected with a return pipe 7 by a feed pipe 3 between described self-loopa supply tank 1 and constant pressure water tank 4.Described self-loopa supply tank 1 is provided with flowrate control valve 2.Described self-loopa supply tank 1 is for providing water source, and current enter constant pressure water tank 4 by feed pipe 3, and the current of spilling flow back to self-loopa supply tank 1 by return pipe 7, forms a loop.
Described constant pressure water tank 4 provides constant current for horizontal rock fracture 9, is provided with water stabling aperture board 5 in it, is provided with steady water hole 51, to keep waterflow stabilization in water stabling aperture board 5.The top of described constant pressure water tank 4 is provided with overflow plate 6, for regulating water level.
Described water inlet end cap 8 is connected on constant pressure water tank 4, and is supplied water by constant pressure water tank 4.
The two ends of described horizontal rock fracture 9 have abutted described inlet end cap 8 and water delivering orifice end cap 10 respectively.The seam crossing silicon rubber sealing of this horizontal rock fracture 9 and water inlet end cap 8, water delivering orifice end cap 10.Flow into horizontal rock fracture 9 from water inlet end cap 8 uniform fluid flow, go out from water delivering orifice end cap stream 10 after running through horizontal rock fracture 9.
Described Pitot tube piezometric tube 11 is arranged on water inlet end cap 8, water delivering orifice end cap 10 respectively, for measuring the water pressure (total hydraulic pressure) of crack water inlet and water delivering orifice.
Describedly determine head water gathering system 11 and be connected with water delivering orifice end cap 10.Determine head water gathering system 11 by the flow of horizontal rock fracture 9 measure by this.
The planar dimension of described water inlet end cap 8, water delivering orifice end cap 10 is 120cm × 120cm, can meet the permeability test carrying out array of sizes (planar dimension: 10cm × 10cm ~ 100 cm × 100cm) rock fracture.
Above-mentioned large scale rock crack infiltration experiment system is adopted to carry out the measuring method of infiltration coefficient as follows:
1), water inlet end cap, water delivering orifice end cap are arranged on the two ends of horizontal rock fracture;
2), to horizontal rock fracture water filling, to get rid of gas in crack;
3), apply infiltration hydraulic pressure, by Pitot tube piezometric tube measure rock fracture import water pressure ( ) and go out water pressure ( );
4), by determine head water gathering system measure rock fracture inflow-rate of water turbine ( );
5), according to cubic law, the infiltration coefficient of rock fracture is by following formulae discovery:
In formula: for the infiltration coefficient of rock fracture; for acceleration of gravity.
Further, described in for fracture opening is ; Wherein, for the water movement coefficient of viscosity; , be respectively width and the length of rock fracture.
To the rock fracture of each size, permeability test can be carried out by above-mentioned test procedure.Change the rock fracture of different size, different roughness, repeat above-mentioned test procedure, the change of research slot dimensions, roughness coefficient is on the infiltrative impact of rock fracture.
Above embodiment is only the preferred embodiment of this creation, and not in order to limit this creation, any amendment made within all spirit in this creation and principle, equivalent replacement, improvement etc., within the protection domain that all should be included in this creation.

Claims (7)

1. a large scale rock crack infiltration experiment system, is characterized in that: comprise self-loopa supply tank, constant pressure water tank, water inlet end cap, water delivering orifice end cap, horizontal rock fracture, Pitot tube piezometric tube and determine head water gathering system; Wherein, be connected with a return pipe by a feed pipe between described self-loopa supply tank and constant pressure water tank; Described water inlet end cap is connected on constant pressure water tank; The two ends of described horizontal rock fracture have abutted described inlet end cap and water delivering orifice end cap respectively; Described Pitot tube piezometric tube is arranged on water inlet end cap, water delivering orifice end cap respectively; Describedly determine head water gathering system and be connected with water delivering orifice end cap.
2. large scale rock crack as claimed in claim 1 infiltration experiment system, is characterized in that: described self-loopa supply tank is provided with flowrate control valve.
3. large scale rock crack as claimed in claim 1 infiltration experiment system, it is characterized in that: be provided with water stabling aperture board in described constant pressure water tank, water stabling aperture board is provided with steady water hole, and the top of described constant pressure water tank is provided with overflow plate.
4. large scale rock crack as claimed in claim 1 infiltration experiment system, is characterized in that: the seam crossing silicon rubber sealing of described horizontal rock fracture and water inlet end cap, water delivering orifice end cap.
5. large scale rock crack as claimed in claim 1 infiltration experiment system, is characterized in that: the planar dimension of described water inlet end cap, water delivering orifice end cap is 120cm × 120cm.
6. adopt the large scale rock crack infiltration experiment system as described in claim 1 to 5 any one to measure a method for rock fracture infiltration coefficient, it is characterized in that: comprise the steps:
1), water inlet end cap, water delivering orifice end cap are arranged on the two ends of horizontal rock fracture;
2), to horizontal rock fracture water filling, to get rid of gas in crack;
3), apply infiltration hydraulic pressure, by Pitot tube piezometric tube measure rock fracture import water pressure ( ) and go out water pressure ( );
4), by determine head water gathering system measure rock fracture inflow-rate of water turbine ( );
5), according to cubic law, the infiltration coefficient of rock fracture is by following formulae discovery:
In formula: for the infiltration coefficient of rock fracture; for acceleration of gravity.
7. the measuring method of large scale rock crack as claimed in claim 6 infiltration coefficient, is characterized in that: described in for fracture opening is ; Wherein, for the water movement coefficient of viscosity; , be respectively width and the length of rock fracture.
CN201510193543.4A 2015-04-23 2015-04-23 Large-size rock fracture permeability test system and measuring method thereof CN104819921A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104614296A (en) * 2015-01-23 2015-05-13 山东大学 Visual two-dimensional fracture network rock mass seepage dynamic and real-time monitoring system and method
CN105158141A (en) * 2015-09-08 2015-12-16 河海大学 Recyclable coarse fracture high velocity seepage testing apparatus
CN106018748A (en) * 2016-06-27 2016-10-12 山东科技大学 Single-joint rock mass flow-solid coupling testing system and method
CN106092856A (en) * 2016-07-15 2016-11-09 中国矿业大学 A kind of coarse Fracture Networks seepage flow quantitative visualization analog systems and test method thereof
CN106124383A (en) * 2016-07-15 2016-11-16 中国矿业大学 A kind of simulation fine and close rock mass intersection crack permeation flow tester
CN106198932A (en) * 2016-09-07 2016-12-07 山东大学 The experimental provision of water petrofacies interaction and method in a kind of simulation rock crack
CN106290113A (en) * 2016-09-22 2017-01-04 绍兴文理学院 Apparatus for unsaturated seepage experiment of rock cranny based on axial translation technology
CN106840994A (en) * 2016-12-19 2017-06-13 延长油田股份有限公司七里村采油厂 The experimental provision and method of a kind of flow in low permeability core horizontal joint seepage flow field recognition
CN107014735A (en) * 2017-05-16 2017-08-04 绍兴文理学院 A kind of multifunctional rock crack infiltration experiment system
CN108051349A (en) * 2017-11-29 2018-05-18 绍兴文理学院 A kind of visual Single Fracture permeability dimensional effect testing equipment and method
CN108709843A (en) * 2018-05-15 2018-10-26 长沙理工大学 A kind of pilot system and test method measuring rock fracture multiphase porous flow characteristic
CN111157422A (en) * 2019-12-30 2020-05-15 中国地质大学(武汉) Device capable of quantitatively adjusting rock rough fracture opening and using method thereof
CN111829933A (en) * 2020-07-21 2020-10-27 中国矿业大学 Fracture network shear seepage test device and test method thereof

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104614296A (en) * 2015-01-23 2015-05-13 山东大学 Visual two-dimensional fracture network rock mass seepage dynamic and real-time monitoring system and method
CN104614296B (en) * 2015-01-23 2018-08-07 山东大学 The two-dimentional rock mass of fracture network seepage flow dynamic real-time monitoring system of visualization and method
CN105158141A (en) * 2015-09-08 2015-12-16 河海大学 Recyclable coarse fracture high velocity seepage testing apparatus
CN106018748A (en) * 2016-06-27 2016-10-12 山东科技大学 Single-joint rock mass flow-solid coupling testing system and method
CN106092856A (en) * 2016-07-15 2016-11-09 中国矿业大学 A kind of coarse Fracture Networks seepage flow quantitative visualization analog systems and test method thereof
CN106124383A (en) * 2016-07-15 2016-11-16 中国矿业大学 A kind of simulation fine and close rock mass intersection crack permeation flow tester
CN106198932A (en) * 2016-09-07 2016-12-07 山东大学 The experimental provision of water petrofacies interaction and method in a kind of simulation rock crack
CN106198932B (en) * 2016-09-07 2018-08-31 山东大学 The experimental provision and method of water lithofacies interaction in a kind of simulation rock crack
CN106290113A (en) * 2016-09-22 2017-01-04 绍兴文理学院 Apparatus for unsaturated seepage experiment of rock cranny based on axial translation technology
CN106840994B (en) * 2016-12-19 2019-06-04 延长油田股份有限公司七里村采油厂 A kind of experimental provision and method of flow in low permeability core horizontal joint seepage flow field recognition
CN106840994A (en) * 2016-12-19 2017-06-13 延长油田股份有限公司七里村采油厂 The experimental provision and method of a kind of flow in low permeability core horizontal joint seepage flow field recognition
CN107014735A (en) * 2017-05-16 2017-08-04 绍兴文理学院 A kind of multifunctional rock crack infiltration experiment system
CN108051349A (en) * 2017-11-29 2018-05-18 绍兴文理学院 A kind of visual Single Fracture permeability dimensional effect testing equipment and method
CN108709843A (en) * 2018-05-15 2018-10-26 长沙理工大学 A kind of pilot system and test method measuring rock fracture multiphase porous flow characteristic
CN111157422A (en) * 2019-12-30 2020-05-15 中国地质大学(武汉) Device capable of quantitatively adjusting rock rough fracture opening and using method thereof
CN111157422B (en) * 2019-12-30 2021-03-30 中国地质大学(武汉) Device capable of quantitatively adjusting rock rough fracture opening and using method thereof
CN111829933A (en) * 2020-07-21 2020-10-27 中国矿业大学 Fracture network shear seepage test device and test method thereof
CN111829933B (en) * 2020-07-21 2021-03-05 中国矿业大学 Fracture network shear seepage test device and test method thereof

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