CN103558136A - System and method for testing rock damage and permeability under coupling effect of temperature stress and circumferential seepage - Google Patents

System and method for testing rock damage and permeability under coupling effect of temperature stress and circumferential seepage Download PDF

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CN103558136A
CN103558136A CN201310554863.9A CN201310554863A CN103558136A CN 103558136 A CN103558136 A CN 103558136A CN 201310554863 A CN201310554863 A CN 201310554863A CN 103558136 A CN103558136 A CN 103558136A
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rock
pressure
force
damage
proving installation
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CN201310554863.9A
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CN103558136B (en
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王军祥
姜谙男
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大连海事大学
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Abstract

The invention discloses a system for testing rock damage and permeability under the coupling effect of temperature stress and circumferential seepage. The system comprises a frozen-heave force test device and a permeation test device, wherein the permeation test device comprises a pressure chamber for loading a rock test piece to be tested, a pressure loading device, a permeation pressure increasing and measuring device, a water bath heating device, an ultrasonic damage test device and a data acquisition device. The invention further discloses a method for testing rock damage and permeability under the coupling effect of temperature stress and circumferential seepage. The method comprises the following steps: carrying out repeated freezing-thawing tests on a rock by the frozen-heave force test device, measuring the frozen-heave force change of the rock test piece, putting the rock into the pressure chamber, applying a pressure to the rock test piece by the pressure loading device, and testing a rock permeation coefficient k and ultrasonic wave speed transmission time t under the action of flowing liquid with different temperatures and pressures so as to make a research on rock damage and permeability.

Description

Damage of rock and penetration testing system and method for testing under the coupling of temperature stress hoop seepage flow

Technical field

The present invention relates to rock permeability proving installation and method of testing, relate in particular to damage of rock and penetration testing system and method for testing under the coupling of temperature stress hoop seepage flow.

Background technology

In the rich pool subterranean tunnel construction process in Han district, under excavation disturbance, stress field of the surrounding rock carries out quadratic distribution, has temperature, the problem of seepage flow to shoulderbed effect simultaneously, under these factor actings in conjunction, to engineering safety, brings significant impact.To the evaluation of this class problem and prediction, need to further investigate research to the perviousness of rock under complicated coupling condition and damage feature.From rock temperature, stress and many, seepage flow, be coupled and damage the angle combining, can fundamentally solve better the problem running in engineering.

The infiltration coefficient of rock mass is not only the function of the feature of rock mass own, is also the fundamental function characterizing by fluid mobile in rock mass, and the kinematic coefficient of viscosity of infiltration coefficient and fluid is inversely proportional to, and kinematic coefficient of viscosity is the function of temperature.The infiltration coefficient of rock mass is the function of fluid temperature, temperature affects the distribution of seepage field by affecting the infiltration coefficient of rock mass, the temperature potential gradient itself simultaneously forming due to temperature difference also can cause flowing of water, because temperature potential itself is exactly comparatively complicated problem, temperature is also influential to water movement.

Under many couplings of study of rocks, perviousness, damage feature have important practical significance.For the research under this complicated coupling effect, be unable to do without innovation and the research of testing equipment.At present, existing many about the testing equipment under coupling condition, but unified standard, test performance are not very different, and seldom the testing equipment of part can for people generally, be developed and also just rest on the research of particular problem mostly.Understand the existing open testing equipment of introducing, relate to temperature, stress, hoop seepage effect, and the test unit that can measure in real time damage of rock is not also seen open report.

Summary of the invention

The problem existing according to prior art, the invention discloses damage of rock and penetration testing system under the coupling of a kind of temperature stress hoop seepage flow, comprises frost-heave force proving installation, and the pervasion test device being used in conjunction with described frost-heave force proving installation;

Described pervasion test device comprises pressure chamber, pressure loading device, osmotic pressure pressurization and measurement mechanism, water bath heating device, ultrasound injury proving installation and the data collector that loads rock sample to be measured; Described pressure loading device, osmotic pressure pressurization and measurement mechanism, ultrasound injury proving installation and data collector are connected with pressure chamber respectively, and described water bath heating device is connected with osmotic pressure pressurization and measurement mechanism.

The bottom of described pressure chamber is fixedly connected with hydraulic jack; Described pressure loading device comprises: fuel tank, in described fuel tank, be provided with out oil strainer and return filter, describedly go out oil strainer and be connected with solenoid directional control valve respectively with return filter, described solenoid directional control valve is connected with hydraulic jack with scavenge pipe by flowline; Go out between oil strainer and solenoid directional control valve and be disposed with hydraulic oil pump and retaining valve I, between described solenoid directional control valve and hydraulic jack, be disposed with stop valve I and remote valve; Between described solenoid directional control valve and return filter, be provided with precursor overflow valve and remote pressure regulating valve.

Described osmotic pressure pressurization and measurement mechanism comprise hydraulic pump, stop valve II, retaining valve II, described hydraulic pump is connected with the inlet of pressure chamber, between described hydraulic pump and pressure chamber, be disposed with retaining valve II and stop valve II, described stop valve IIYu is provided with osmotic pressure tensimeter between pressure chamber.

Described pressure chamber comprises the cylinder body that holds rock sample of a hollow, the bottom of described cylinder interior and top are connected with respectively force-transmitting pole I and force-transmitting pole II, described force-transmitting pole I and force-transmitting pole II stretch out along described cylinder body respectively, between described force-transmitting pole I and force-transmitting pole II, be provided with the spatial accommodation of placing hollow fissure rock test specimen, on the lower surface of the upper surface of described force-transmitting pole I and force-transmitting pole II, be respectively arranged with groove I and groove II, in described groove I and groove II, be provided with rubber seal, on described cylinder body, be provided with upper end cover and bottom end cover, between described upper end cover and bottom end cover and cylinder body, be provided with a plurality of O-ring seals.

In described force-transmitting pole I and force-transmitting pole II, be respectively arranged with ultrasonic probe I and ultrasonic probe II, described ultrasonic probe I is connected with described ultrasound injury proving installation with ultrasonic probe II.

Described cylinder body has inlet and liquid outlet, and described cylinder body is connected with described hydraulic pump by inlet, and described liquid outlet is connected with flowmeter.

Described data collector comprises displacement transducer and pressure transducer.

Damage of rock and a penetration testing method under the coupling of hoop seepage flow, comprise the following steps:

Step 1: key rock is prefabricated into various the arrange rock samples of hollow in crack of difference that have;

Step 2: rock sample prefabricated in step 1 is loaded in frost-heave force proving installation, carries out multigelation, the frost-heave force that real-time online detects rock sample in multigelation process changes;

Step 3: rock sample is taken out in frost-heave force proving installation, be loaded in pressure chamber, utilize axial loading device to apply preheating setting pressure to rock sample, be arranged in cylinder body rock sample is sealed;

Step 4: start the required fluid temperature T of water bath heating device adjusting test, for detecting penetrating fluid is provided under osmotic pressure;

Step 5: utilize osmotic pressure pressurization and measurement mechanism to apply osmotic pressure to rock sample, measure the seepage discharge Q of liquid in cylinder body; Utilize ultrasound injury proving installation to be determined at sound wave under the osmotic pressure effect initial travel-time t in rock sample simultaneously 0;

Step 6: rock sample is applied to axle pressure, gather displacement data and pressure data by displacement transducer and pressure transducer; By ultrasound injury proving installation, record the seepage flow Q of liquid under the travel-time t of sound wave in loading procedure and different liquids temperature T, according to measurement data acoustic transit time, t calculates velocity of wave, according to the seepage pressure P measuring and seepage flow Q, calculate permeability k, thereby analyze the situation of change in temperature stress hoop seepage flow coupling rock permeability.

Owing to having adopted technique scheme, the invention discloses damage of rock and penetration testing system and method for testing under the coupling of temperature stress hoop seepage flow, utilize frost-heave force proving installation rock to be carried out to the frost-heave force variation of measuring this rock sample after multigelation experiment, again rock is positioned in pressure chamber, utilize pressure loading device to rock sample exert pressure, under the working fluid and pressure-acting of different temperatures, realize the mensuration of rock permeability coefficient k and the mensuration of ultrasonic velocity travel-time t, thus the perviousness of study of rocks and degree of impairment.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the application, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the structural representation of damage of rock and penetration testing system in the present invention.

Fig. 2 is the structural representation of pervasion test device in the present invention.

Fig. 3 is the connection diagram of a plurality of devices in pressure chamber and system of the present invention in the present invention.

Fig. 4 is the structural representation of frost-heave force proving installation in the present invention.

Fig. 5 is the structural representation of pressure chamber in the present invention.

Fig. 6 is the structural representation of pressure loading device in the present invention.

The structural representation of osmotic pressure pressurization and measurement mechanism in Fig. 7 the present invention.

Fig. 8 is the process flow diagram of the method for testing of damage of rock and penetration testing system in the present invention.

In figure: 100. frost-heave force proving installations; 200. pervasion test device; 1. pressure loading device; 2. pressure chamber; 3. osmotic pressure pressurizes and measurement mechanism; 4. water bath heating device; 5. ultrasound injury proving installation; 6. data collector; 2-1. hydraulic jack; 10. flowline; 11. fuel tanks; 11-1. go out oil strainer; 11-2. return filter; 12. hydraulic oil pumps; 13. retaining valve I1; 14. stop valve I; 15. remote valves; 17. solenoid directional control valves; 18. precursor overflow valves; 19. remote pressure regulating valves; 10.1. scavenge pipe; 31. hydraulic pumps; 32. stop valve II; 33. retaining valve II; 34. osmotic pressure tensimeters; 20. cylinder bodies; 20-1. force-transmitting pole I; 20-2. force-transmitting pole II; 27. spatial accommodations; 20.1 groove I; 20.2 groove II; 20.3. rubber seal; 20.4. upper end cover; 20.5 bottom end covers; 20.6 O-ring seals; 12-1. ultrasonic probe I; 12-2. ultrasonic probe II; 20.7 inlets; 20.8 liquid outlets; 23. flowmeters.

Embodiment

For making technical scheme of the present invention and advantage clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is known to complete description:

As shown in Figure 1, a kind of damage of rock and penetration testing system, comprise frost-heave force proving installation 100 and pervasion test device 200, frost-heave force proving installation 100 is application number in the present invention: 2013206217889, patent name: disclosed prior art in a kind of saturated rock frost-heave force real-time online testing device, be illustrated in figure 4 the structural representation of frost-heave force proving installation 100 in the present invention, as shown in figure of the prior art as disclosed in the patent No. 2013206217889.Choose on-the-spot rock sample, be processed into the standard rock sample of hollow, and the crack of prefabricated various combination form, by frost-heave force proving installation 100, measure the size of the frost-heave force of rock sample in frozen-thaw process.Native system is used in conjunction with frost-heave force proving installation 100 and pervasion test device 200.

Further, as shown in Figures 2 and 3, pervasion test device 200 comprises: the pressure chamber 2, pressure loading device 1, osmotic pressure pressurization and measurement mechanism 3, water bath heating device 4, ultrasound injury proving installation 5 and the data collector 6 that load rock sample to be measured, pressure loading device 1 is connected with pressure chamber 2, osmotic pressure pressurization and measurement mechanism 3, ultrasound injury proving installation 5 and data collector 6 are connected with pressure chamber 2 respectively, data collector 6 can be computing machine, and test data is gathered and calculated.Water bath heating device 4 is connected with osmotic pressure pressurization and measurement mechanism 3.Wherein pressure chamber 2 for application number is: 2013206173626, and name is called: disclosed prior art in a kind of damage of rock and pervasion test device.Be illustrated in figure 5 the structural representation of pressure chamber 2 in the present invention.In use pressure chamber is fixed on support body.In the present invention the bottom of pressure chamber 2 is connected with to hydraulic jack 2-1, as shown in Figure 3, pressure chamber 2 is connected with pressure loading device 1 by hydraulic jack 2-1.

Further, as shown in Figure 6, pressure loading device 1 comprises: fuel tank 11, in described fuel tank 11, be provided with out oil strainer 11-1 and return filter 11-2, describedly go out oil strainer 11-1 and be connected with solenoid directional control valve 17 respectively with return filter 11-2, described solenoid directional control valve 17 is connected with hydraulic jack 2-1 with scavenge pipe 10.1 by flowline 10.

Further, as shown in Figure 3 and Figure 6, go out between oil strainer 11-1 and solenoid directional control valve 17 and be disposed with hydraulic oil pump 12 and retaining valve I13, between described solenoid directional control valve 17 and hydraulic jack 2-1, be disposed with stop valve I14 and remote valve 15; Between described solenoid directional control valve 17 and return filter 11-2, be provided with precursor overflow valve 18 and remote pressure regulating valve 19.

Further, as Fig. 3 and as shown in Figure 7, osmotic pressure pressurization and measurement mechanism 3 comprise hydraulic pump 31, stop valve II32, retaining valve II33, the inlet of described hydraulic pump 31Yu pressure chamber 2 is connected, between described hydraulic pump 31Yu pressure chamber 2, be disposed with retaining valve II33 and stop valve II32, between described stop valve II32 and pressure chamber 2, be provided with osmotic pressure tensimeter 34.

Further, as shown in Figure 3 and Figure 5, in working order, pressure chamber is arranged on support body and is used, pressure chamber 2 comprises the cylinder body that holds rock sample 20 of a hollow, bottom and the top of described cylinder body 20 inside are connected with respectively force-transmitting pole I20-1 and force-transmitting pole II20-2, described force-transmitting pole I20-1 and force-transmitting pole II20-2 stretch out along described cylinder body 20 respectively, between described force-transmitting pole I20-1 and force-transmitting pole II20-2, be provided with the spatial accommodation 27 of placing hollow fissure rock test specimen, on the lower surface of the upper surface of described force-transmitting pole I20-1 and force-transmitting pole II20-2, be respectively arranged with groove I20.1 and groove II20.2, in described groove I20.1 and groove II20.2, be provided with rubber seal 20.3, on described cylinder body 20, be provided with upper end cover 20.4 and bottom end cover 20.5, between described upper end cover 20.4 and bottom end cover 20.5 and cylinder body 20, be provided with a plurality of O-ring seals 20.6.Utilize rubber seal 20.3 in groove I20.1 and groove II20.2 and the mating reaction of a plurality of O-ring seal 20.6, make that rock sample is sealed to be arranged in cylinder body 20.

Further, be respectively arranged with ultrasonic probe I12-1 and ultrasonic probe II12-2 in described force-transmitting pole I20-1 and force-transmitting pole II20-2, described ultrasonic probe I12-1 is connected with described ultrasound injury proving installation 5 with ultrasonic probe II12-2.

Further, described cylinder body 20 has inlet 20.7 and liquid outlet 20.8, and described cylinder body 20 is connected with described hydraulic pump 31 by inlet 20.7, and described liquid outlet 20.8 is connected with flowmeter 23.By inlet 20.7, the liquid in water bath heating device 6 is injected in rock sample, then by liquid outlet 20.8, flow out, utilize flowmeter 23 to measure seepage flow Q.

Further, described data collector 6 comprises displacement transducer and pressure transducer.

Embodiment: this damage of rock is as follows with the testing process of penetration testing system: first rock sample is processed into the hollow structure matching with the device shape of native system, rock sample is made into multi-form special crack combination, at the interior multigelation of frost-heave force proving installation 100, utilize force cell that this device has to measure the size of frost-heave force rock sample.Then by rock sample from the interior taking-up of frost-heave force proving installation 100, put into the pressure chamber 2 of pervasion test device 200, and guarantee that pressure chamber's 2 sealings arrange.Utilize pressure loading device 1 that pressure chamber 2 is risen to certain altitude, guarantee rock sample 2 interior sealings in pressure chamber, by the force cell reading zero clearing in pressure chamber 2, ultrasonic probe I12-1 is connected with ultrasound injury proving installation 5 with ultrasonic probe II12-2, the inlet of pressure chamber 2 20.7 is connected with hydraulic pump 31, hydraulic pump 31 is connected with water bath heating device 4, and the temperature in water bath heating device 4 is adjusted to the needed temperature of experiment.Open hydraulic pump 31, under seepage effect, utilize ultrasound injury proving installation 5 and ultrasonic probe I12-1 and ultrasonic probe II12-2 test sound wave travel-time initial value.Utilize the rock sample in 1 pair of pressure chamber 2 of pressure loading device to exert pressure, utilize tensimeter 10-1 gaging pressure size, apply osmotic pressure, utilize ultrasound injury proving installation 5 and the acoustic transit time of ultrasonic probe test under osmotic pressure effect.The seepage flow of liquid under synchronous recording acoustic transit time, axial strain, load and different temperatures in test, utilizes flowmeter 23 to measure seepage flow.

Wherein in pressure loading device 1, be provided with the motor I 16 that drives hydraulic oil pump 12 work, in osmotic pressure pressurization and measurement mechanism 3, be provided with the motor II 35 that drives hydraulic pump 31 work.

The computing method of ultrasonic velocity V, permeability k and formula, as follows:

1. ultrasonic velocity V measures damage and need to measure the travel-time of sound wave in test specimen, calculates acoustic velocity.In above-mentioned test process, take compressional wave parameter as main, and establishing sound wave is T through the Mintrop wave time of arrival after rock sample p, the travel distance of sound wave in rock is L, compressional wave can be expressed as: V p=L/T p.Because ultrasonic probe is built in force-transmitting pole, thus need to proofread and correct when in force-transmitting pole, sound wave is walked, establish record in force-transmitting pole, sound wave is walked time be T 0, the velocity of sound is calculated as: V p=L/ (T p-T 0).

According to the velocity of wave definition damage variable of rock, damage variable is defined as:

D=1-V p/V p0

In formula: V pand V p0for the velocity of sound of rock and the velocity of sound of rock parent.

2. the laboratory measurement of permeability k has 2 kinds of Transient Method and steady state methods, steady state method is measured is to provide stable pressure reduction at the two ends of rock sample, by the pressure reduction (or flow) measured thus obtain the permeability k of rock, the test duration that experiment needs is long but measuring accuracy is higher, is suitable for the rock of larger permeability.This experimental test is selected this kind of measuring method, according to stablizing Darcy law, has computing formula as follows:

Q = A k μ Δp ΔL

In formula: Q is fluid flow; Δ P is the pressure reduction at core two ends; Δ L is the length of core; A is core cross-sectional area; K is rock permeability; μ is the viscosity of fluid.

Above-mentioned formula is suitably revised, can be obtained the computing formula of this measurement device permeability, with test specimen external diameter, to the distance of internal diameter, replace the length Δ L of core, with the surface area of cylindrical specimen, replace core cross-sectional area A.Only need to measure the flow of unit interval inner fluid, just can obtain the permeability k of rock.

As shown in Figure 8: damage of rock and penetration testing method under a kind of temperature stress and the coupling of hoop seepage flow, comprise the following steps:

Step 1: key rock is prefabricated into various the arrange rock samples of hollow in crack of difference that have;

Step 2: rock sample prefabricated in step 1 is loaded in frost-heave force proving installation 100, carries out multigelation, the frost-heave force that real-time online detects rock sample in multigelation process changes;

Step 3: rock sample, from the interior taking-up of frost-heave force proving installation 100, is loaded in pressure chamber 2, utilizes 1 pair of rock sample of axial loading device to apply preheating setting pressure, be arranged in cylinder body 20 rock sample is sealed; Owing to thering is being connected of rubber seal 20.3 and a plurality of O-ring seals in pressure chamber 2, make that rock sample is sealed to be arranged in cylinder body 20.

Step 4: start the required fluid temperature T of water bath heating device 4 adjusting tests, for detecting penetrating fluid is provided under osmotic pressure;

Step 5: utilize osmotic pressure pressurization and 3 pairs of rock samples of measurement mechanism to apply osmotic pressure, measure the seepage discharge Q of cylinder body 20 interior liquid; Wherein seepage discharge Q utilizes flowmeter 23 to record.Utilize ultrasound injury proving installation 5 to be determined at sound wave under the osmotic pressure effect initial travel-time t in rock sample simultaneously 0;

Step 6: rock sample is applied to axle pressure, gather displacement data and pressure data by displacement transducer and pressure transducer; The seepage flow Q that records liquid under the travel-time t of sound wave in loading procedure and different liquids temperature T by ultrasound injury proving installation 5, according to measurement data acoustic transit time, t calculates velocity of wave, because the variation of velocity of wave has reflected the degree of impairment of rock itself.According to the seepage pressure P measuring and seepage flow Q, calculate permeability k, thereby analyze the situation of change in temperature stress hoop seepage flow coupling rock permeability.

The disclosed damage of rock of patent of the present invention and penetration testing system and method for testing, can carry out the different temperatures of different stress levels, seepage flow liquid, damage of rock and the perviousness correlation test under the effect of hoop osmotic pressure, adopt the special construction of the pressure chamber 2 of hoop seepage flow to combine from different rock samples, adopt 4 pairs of seepage flow liquid of water bath heating device to carry out temperature control, when measuring permeability, can measure the axial ultrasonic velocity of wave of rock sample, with the damage feature of this study of rocks test specimen.

The above; it is only preferably embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; according to technical scheme of the present invention and inventive concept thereof, be equal to replacement or changed, within all should being encompassed in protection scope of the present invention.

Claims (8)

1. damage of rock and a penetration testing system under the coupling of temperature stress hoop seepage flow, is characterized in that: comprise frost-heave force proving installation (100), and the pervasion test device (200) being used in conjunction with described frost-heave force proving installation (100);
Described pervasion test device (200) comprises pressure chamber (2), pressure loading device (1), osmotic pressure pressurization and measurement mechanism (3), water bath heating device (4), ultrasound injury proving installation (5) and the data collector (6) that loads rock sample to be measured; Described pressure loading device (1), osmotic pressure pressurization and measurement mechanism (3), ultrasound injury proving installation (5) and data collector (6) are connected with pressure chamber (2) respectively, and described water bath heating device (4) is connected with osmotic pressure pressurization and measurement mechanism (3).
2. damage of rock and penetration testing system under temperature stress hoop seepage flow according to claim 1 coupling, be further characterized in that: the bottom of described pressure chamber (2) is fixedly connected with hydraulic jack (2-1); Described pressure loading device (1) comprising: fuel tank (11), in described fuel tank (11), be provided with out oil strainer (11-1) and return filter (11-2), describedly go out oil strainer (11-1) and be connected with solenoid directional control valve (17) respectively with return filter (11-2), described solenoid directional control valve (17) is connected with hydraulic jack (2-1) with scavenge pipe (10.1) by flowline (10); Go out between oil strainer (11-1) and solenoid directional control valve (17) and be disposed with hydraulic oil pump (12) and retaining valve I(13), between described solenoid directional control valve (17) and hydraulic jack (2-1), be disposed with stop valve I(14) and remote valve (15); Between described solenoid directional control valve (17) and return filter (11-2), be provided with precursor overflow valve (18) and remote pressure regulating valve (19).
3. damage of rock and penetration testing system under temperature stress hoop seepage flow according to claim 1 coupling, be further characterized in that: described osmotic pressure pressurization and measurement mechanism (3) comprise hydraulic pump (31), stop valve II(32), retaining valve II(33), described hydraulic pump (31) is connected with the inlet of pressure chamber (2), between described hydraulic pump (31) and pressure chamber (2), be disposed with retaining valve II(33) and stop valve II(32), described stop valve II(32) and between pressure chamber (2), be provided with osmotic pressure tensimeter (34).
4. damage of rock and penetration testing system under temperature stress hoop seepage flow according to claim 1 coupling, be further characterized in that: described pressure chamber (2) comprise the cylinder body that holds rock sample (20) of a hollow, inner bottom and the top of described cylinder body (20) is connected with respectively force-transmitting pole I(20-1) and force-transmitting pole II(20-2), described force-transmitting pole I(20-1) and force-transmitting pole II(20-2) along described cylinder body (20), stretch out respectively, described force-transmitting pole I(20-1) and force-transmitting pole II(20-2) between be provided with the spatial accommodation (27) of placing hollow fissure rock test specimen, described force-transmitting pole I(20-1) upper surface and force-transmitting pole II(20-2) lower surface on be respectively arranged with groove I(20.1) and groove II(20.2), described groove I(20.1) and groove II(20.2) in be provided with rubber seal (20.3), on described cylinder body (20), be provided with upper end cover (20.4) and bottom end cover (20.5), between described upper end cover (20.4) and bottom end cover (20.5) and cylinder body (20), be provided with a plurality of O-ring seals (20.6).
5. damage of rock and penetration testing system under temperature stress hoop seepage flow according to claim 4 coupling, be further characterized in that: described force-transmitting pole I(20-1) and force-transmitting pole II(20-2) in be respectively arranged with ultrasonic probe I(12-1) and ultrasonic probe II(12-2), described ultrasonic probe I(12-1) with ultrasonic probe II(12-2) be connected with described ultrasound injury proving installation (5).
6. damage of rock and penetration testing system under temperature stress hoop seepage flow according to claim 4 coupling, be further characterized in that: described cylinder body (20) has inlet (20.7) and liquid outlet (20.8), described cylinder body (20) is connected with described hydraulic pump (31) by inlet (20.7), and described liquid outlet (20.8) is connected with flowmeter (23).
7. damage of rock and penetration testing system under temperature stress hoop seepage flow according to claim 1 coupling, be further characterized in that: described data collector (6) comprises displacement transducer and pressure transducer.
8. damage of rock and a penetration testing method under the coupling of temperature stress hoop seepage flow, is characterized in that: comprise the following steps:
Step 1: key rock is prefabricated into various the arrange rock samples of hollow in crack of difference that have;
Step 2: rock sample prefabricated in step 1 is loaded in frost-heave force proving installation (100), carries out multigelation, the frost-heave force that real-time online detects rock sample in multigelation process changes;
Step 3: rock sample, from taking out in frost-heave force proving installation (100), is loaded in pressure chamber (2), utilizes axial loading device (1) to apply preheating setting pressure to rock sample, be arranged in cylinder body (20) rock sample is sealed;
Step 4: start the required fluid temperature T of water bath heating device (4) adjusting test, for detecting penetrating fluid is provided under osmotic pressure;
Step 5: utilize osmotic pressure pressurization and measurement mechanism (3) to apply osmotic pressure to rock sample, measure the seepage discharge Q of the interior liquid of cylinder body (20); Utilize ultrasound injury proving installation (5) to be determined at sound wave under the osmotic pressure effect initial travel-time t in rock sample simultaneously 0;
Step 6: rock sample is applied to axle pressure, gather displacement data and pressure data by displacement transducer and pressure transducer; By ultrasound injury proving installation (5), record the seepage flow Q of liquid under the travel-time t of sound wave in loading procedure and different liquids temperature T, according to measuring acoustic transit time t, calculate velocity of wave, according to the seepage pressure P measuring and seepage flow Q, calculate permeability k, thereby analyze the situation of change in temperature stress hoop seepage flow coupling rock permeability.
CN201310554863.9A 2013-11-07 2013-11-07 Damage of rock and Permeation Test System and method of testing under temperature stress hoop seepage flow coupling CN103558136B (en)

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