CN110865012A - Rock material in-situ seepage measurement system and method based on Hopkinson bar - Google Patents
Rock material in-situ seepage measurement system and method based on Hopkinson bar Download PDFInfo
- Publication number
- CN110865012A CN110865012A CN201911125368.XA CN201911125368A CN110865012A CN 110865012 A CN110865012 A CN 110865012A CN 201911125368 A CN201911125368 A CN 201911125368A CN 110865012 A CN110865012 A CN 110865012A
- Authority
- CN
- China
- Prior art keywords
- oil
- incident
- transmission
- vertical plate
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011435 rock Substances 0.000 title claims abstract description 64
- 239000000463 material Substances 0.000 title claims abstract description 37
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 36
- 238000005259 measurement Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 91
- 230000035699 permeability Effects 0.000 claims abstract description 32
- 230000009471 action Effects 0.000 claims abstract description 10
- 238000012360 testing method Methods 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 144
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000002347 injection Methods 0.000 claims description 19
- 239000007924 injection Substances 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 9
- 239000010720 hydraulic oil Substances 0.000 claims description 7
- 238000000691 measurement method Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 230000036316 preload Effects 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims 1
- 238000011160 research Methods 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 239000011148 porous material Substances 0.000 description 6
- 101100328887 Caenorhabditis elegans col-34 gene Proteins 0.000 description 5
- RRLHMJHRFMHVNM-BQVXCWBNSA-N [(2s,3r,6r)-6-[5-[5-hydroxy-3-(4-hydroxyphenyl)-4-oxochromen-7-yl]oxypentoxy]-2-methyl-3,6-dihydro-2h-pyran-3-yl] acetate Chemical compound C1=C[C@@H](OC(C)=O)[C@H](C)O[C@H]1OCCCCCOC1=CC(O)=C2C(=O)C(C=3C=CC(O)=CC=3)=COC2=C1 RRLHMJHRFMHVNM-BQVXCWBNSA-N 0.000 description 5
- 238000007599 discharging Methods 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Fluid Mechanics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a rock material in-situ seepage measurement system and method based on a Hopkinson bar, and the rock material in-situ seepage measurement system comprises a platform (19), a separated Hopkinson bar and an improved rock material in-situ seepage measurement device, wherein the separated Hopkinson bar is used for providing a dynamic loading test condition; the axial preloading device (20) is used for providing preloading axial stress; the improved rock material in-situ seepage measurement device transmits the axial preloading stress to the transmission plunger (5) through the transmission rod (22) and further transmits the axial preloading stress to the sample (6), so that the axial preloading of the sample (6) is realized. The dynamic impact loading of the rock under different stress conditions can be realized, the permeability coefficient measurement is respectively carried out before and after the loading, the powerful support is provided for researching the permeability evolution mechanism of the rock under the action of the dynamic load under the deep occurrence condition, and the achievement can provide accurate and credible experimental parameters for the actual engineering for engineering design and scientific research reference.
Description
Technical Field
The invention relates to the technical field of rock dynamic physical mechanics measurement, in particular to an improved rock material in-situ seepage measurement system and a measurement method.
Background
Petroleum, natural gas and the like are important energy sources for human beings, and the exploitation amount of the petroleum, the natural gas and the like is always high. Because the exploitation of shallow oil gas is almost exhausted, people gradually advance to the exploitation of unconventional oil gas resources (deep oil and natural gas). However, the development of deep oil and gas exploitation is restricted by the defects of high difficulty, high exploitation cost and the like in the deep oil and gas exploitation process. With the continuous progress of deep oil and gas exploitation technology, related research and engineering practice show that increasing the permeability of underground deep rock mass is an effective means for improving the deep oil and gas exploitation efficiency. At present, hydraulic fracturing, blasting permeability increasing and ultrasonic intensified oil production technologies are main permeability increasing modes. Due to complex occurrence conditions, the mechanical behavior of deep rocks after the action of the blast load is difficult to monitor in real time, the change of permeability coefficients before and after the action cannot be accurately measured, and the change rule of the permeability of the deep rocks after the dynamic load cannot be completely explained and predicted by the existing theory. Therefore, the research on the evolution mechanism of the permeability of the rock under the deep occurrence condition after the rock is subjected to the dynamic loading needs to be conducted by means of indoor tests. On the other hand, due to the action of dynamic loads such as earthquake, blasting and the like, surrounding rock or underground engineering structures are often damaged in different degrees, and then the permeability of rock mass is affected, so that a series of geological disasters are caused. Therefore, understanding the evolution law of permeability of deep rocks under the action of dynamic loads is a key scientific problem at the front of deep geological engineering and geotechnical engineering disciplines and a major problem to be solved urgently.
At present, research on the permeability properties of rock all rely on experimental studies. An overburden porosity permeability instrument developed by CoreTest corporation of america can apply confining pressure to a core sample and simultaneously apply pore water pressure, measure and calculate the porosity and permeability changes of the rock under high pressure. The high-temperature and high-pressure rock triaxial testing machine developed by the university of mineral industry in China can apply gas pressure with certain pressure difference at two ends of a sample while applying high temperature and high confining pressure to a rock sample, so that the permeability of the rock sample is calculated by measuring the gas flow; in addition, there is also an MTS815.02 rock mechanics electrohydraulic servo system, which can perform triaxial loading on a rock sample and obtain its permeability coefficient by measuring the fluid flow under the action of pore pressure gradient. The experimental equipment can only realize the mechanical property test of the rock under the coupling action of osmotic pressure and static or dynamic load, and can not measure the osmotic coefficient of the rock after dynamic load disturbance under the deep occurrence condition. The FDES-641 triaxial displacement system produced by American core company can realize measurement of permeability coefficient of a rock sample under a confining pressure state. The test system can only measure the permeability coefficient of the rock in a static confining pressure state, and cannot consider the permeability coefficient change after the influence of dynamic impact load.
Disclosure of Invention
Aiming at the problems, the invention provides a rock material in-situ seepage measurement system and method based on Hopkinson bars, which are used for realizing dynamic impact loading of rocks under different stress conditions and respectively measuring the permeability coefficient before and after loading.
The rock material in-situ seepage measurement system based on the Hopkinson bar comprises a platform 19, a separated Hopkinson pressure bar and a rock material in-situ seepage measurement device, wherein the separated Hopkinson pressure bar is used for providing a dynamic loading test condition;
the structure of the split Hopkinson pressure bar comprises a bullet 23, an incident rod 21, a momentum trap 25, a transmission rod 22 and an axial preloading device 20, wherein all the components are fixed on the platform 19 through a support 24, the rock material in-situ seepage measuring device is installed on the platform 19 and is positioned between the incident rod 21 and the transmission rod 22, and the axial preloading device 20 and the improved rock material in-situ seepage measuring device are connected with an oil pump 18 through an oil pipe 17; after the bullet 23 is launched, the bullet collides with the incident rod 12 in a centering way to generate a row of compression stress waves, and the stress waves are transmitted to the sample 6 after being transmitted to the incident striker 4 along the incident rod 21 and further continuously transmitted to the transmission striker 5 and the transmission rod 22;
the axial preloading device 20 is used for providing a preloading axial stress, and the provided preloading axial stress is transmitted to the transmission plunger 5 through the transmission rod 22 and further transmitted to the sample 6 so as to realize the preloading of the axial stress on the sample 6;
the improved rock material in-situ seepage measuring device comprises an oil cylinder 1, an incident vertical plate 2, a transmission vertical plate 3, an incident ram 4, a transmission ram 5, a heat shrinkable tube 7, a sealing tile 8, a guide rail support 9 and a guide rail 10 which are arranged on a platform 19, and the improved rock material in-situ seepage measuring device has the following specific structure:
the incident vertical plate 2 and the guide rail bracket 9 are fixedly connected with the platform 19 through bolts respectively; the guide rail bracket 9 and the incident vertical plate 2 are fixedly connected with two guide rails 10, the lower part of the transmission vertical plate 3 is provided with two round holes with the same diameter as the guide rails 10, and the guide rails 10 penetrate through the round holes on the transmission vertical plate 3, so that the transmission vertical plate 3 is supported, and the transmission vertical plate 3 can freely slide on the guide rails 10; an oil cylinder 1 is arranged between the incident vertical plate 2 and the transmission vertical plate 3, round holes with the same diameter as the incident striker 4 and the transmission striker 5 are arranged at the centers of the incident vertical plate 2 and the transmission vertical plate 3, and the round holes can be used for the incident striker 4 and the transmission striker 5 to pass through and freely move along the axial direction of a rod piece; the incident vertical plate 2, the transmission vertical plate 3 and the oil cylinder 1 are fixed and clamped by four bolts penetrating through the incident vertical plate 2 and the transmission vertical plate 3; the inner sides of the incident vertical plate 2 and the transmission vertical plate 3 are provided with annular grooves with the same inner diameter and outer diameter as those of the oil cylinder 1, so that the oil cylinder 1 is in embedded fit with the incident vertical plate 2 and the transmission vertical plate 3, the oil cylinder 1 becomes a pressure container when in work, and the inside of the pressure container keeps certain pressure; an oil filling hole 15 and an exhaust hole 16 are arranged on the incident vertical plate 2, and the oil filling hole 15 is connected with an oil pump 18 through an oil pipe 17; after the incident vertical plate 2 and the transmission vertical plate 3 are clamped by the oil cylinder 1, hydraulic oil is injected into the oil cylinder 1 through the oil pump 18 and the oil pipe 17 through the oil injection hole 15, air in the oil cylinder 1 is exhausted through the exhaust hole 16 until the oil cylinder 1 is filled with the hydraulic oil, and then the pressure in the oil cylinder 1 is increased, so that pre-confining pressure loading on the sample 6 is realized; the centers of the inner parts of the incident lance 4 and the transmission lance 5 are provided with a water injection hole 11, one end of the water injection hole 11 is communicated with the outer side surfaces of the incident lance 4 and the transmission lance 5 which are positioned outside the oil cylinder 1, and is connected with a servo hydraulic press 13 through a water pipe 12; the other end of the water injection hole 11 is opened from the bottom surfaces of the incident lance 4 and the transmission lance 5 inside the cylinder 1.
The invention relates to a rock material in-situ seepage measurement method based on Hopkinson bars, which comprises the following steps of:
step 6, if the loading is needed to be continued and the permeability coefficient change is measured, repeating the step 5;
and 7, removing water pressure through a servo water press (or air press) 13, removing axial pressure through an oil pump 18, finally removing confining pressure through the oil pump 18, recovering oil in the oil cylinder 1 through an exhaust hole 15 and an oil pipe 17, removing the heat-shrinkable tube 7, and taking out the sample 6.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides powerful support for researching the permeability evolution mechanism of the rock under the action of dynamic load under the deep occurrence condition, and the achievement can provide accurate and credible experimental parameters for practical engineering for engineering design and scientific research reference.
Drawings
Figure 1 is a side view of the rock material in situ seepage measurement apparatus of the present invention,
figure 2 is a cross-sectional top view of the rock material in-situ permeability measurement apparatus of the present invention,
figure 3 is a front view of the rock material in situ permeability measurement device of the present invention,
FIG. 4 is a schematic diagram of a rock material in-situ seepage measurement system based on Hopkinson bars in the invention,
reference numerals:
1. the device comprises an oil cylinder, 2, an incidence vertical plate, 3, a transmission vertical plate, 4, an incidence ram, 5, a transmission ram, 6, a sample, 7, a heat shrink tube, 8, a sealing tile, 9, a guide rail bracket, 10, a guide rail, 11, a water injection hole, 12, a wiring, 13, a servo hydraulic press (or an air press), 14, a bolt, 15, an oil injection hole, 16 and an exhaust hole. 17. Oil pipe, 18, oil pump, 19, platform, 20, axial preloading device, 21, incident rod, 22, transmission rod, 23, bullet, 24, support, 25, momentum trap.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Fig. 1 to 3 show a side view of the rock material in-situ permeability measurement device of the present invention. The device comprises a platform 19, an oil cylinder 1, an incidence vertical plate 2, a transmission vertical plate 3, an incidence ram 4, a transmission ram 5, a heat-shrinkable tube 7, a sealing tile 8, a guide rail bracket 9 and a guide rail 10, wherein the oil cylinder 1, the incidence vertical plate 2, the transmission vertical plate 3, the incidence ram 4, the transmission ram 5, the heat-shrinkable tube 7, the sealing tile 8; the specific structure is described as follows:
The inner sides of the incident vertical plate 2 and the transmission vertical plate 3 are provided with annular grooves with the same inner diameter and outer diameter as those of the oil cylinder 1, so that the oil cylinder 1 is embedded and matched with the incident vertical plate 2 and the transmission vertical plate 3 and is screwed and fixed by four bolts 14, the oil cylinder 1 becomes a pressure container when in work, and the inside of the pressure container keeps certain pressure.
The incidence vertical plate 2 is provided with an oil filling hole 15 and an exhaust hole 16, and the oil filling hole 15 is connected with an oil pump 18 through an oil pipe 17. After the incident vertical plate 2, the transmission vertical plate 3 and the oil cylinder 1 are clamped by the bolts 14, hydraulic oil can be injected into the oil cylinder 1 through the oil pump 18 and the oil pipe 17 through the oil injection hole 15, air in the oil cylinder 1 is exhausted through the exhaust hole 16 until the oil cylinder 1 is filled with the hydraulic oil, and then the pressure in the oil cylinder 1 is increased, so that pre-confining pressure loading on the sample 6 is realized.
The working pressure of the oil cylinder 1 can reach 60 MPa.
The incident lance 4 and the transmission lance 5 are provided with a water injection hole 11 at the center inside. One end of a water injection hole 11 is punched from the outer side surfaces of an incident ram 4 and a transmission ram 5 which are positioned outside the oil cylinder 1, and is connected with a servo hydraulic press (or pneumatic press) 13 through a water pipe 12; the other end of the water injection hole 11 is opened from the bottom surfaces of the incident lance 4 and the transmission lance 5 inside the cylinder 1.
When the rock material in-situ seepage measuring device works, one end of an incident ram 4 and one end of a transmission ram 5 extend into the oil cylinder 1, two sealing tiles 8 are clamped between the two rams, and a sample 6 is clamped between the sealing tiles 8. The heat shrink tube 7 covers the two sealing tiles 8, the sample 6 and a part of the two collision bars to ensure that the sample is separated from the hydraulic oil inside the oil cylinder 1. A servo hydraulic (or pneumatic) press 13 may inject pore fluid through a water line 12 into the internal pores of the sample 6 and apply pore pressure. The sealing tile 8 has the function that liquid in the water injection hole 11 can freely enter pores of the sample 6, and fragments of the sample 6 cannot enter the water injection hole 11 to cause blockage after the sample 6 is broken by impact; the other end of the incident lance 4 and the other end of the transmission lance 5 are respectively in contact with the incident rod 21 and the transmission rod 22 for transmitting dynamic stress wave load in the test process.
Fig. 4 is a schematic diagram of a rock material in-situ seepage measurement system based on a hopkinson rod according to the present invention. The system comprises a separated Hopkinson pressure bar and a rock material in-situ seepage measuring device.
The structure of the split Hopkinson pressure bar comprises a bullet 23, an incident rod 21, a momentum trap 25, a transmission rod 22 and an axial preloading device 20, wherein all the components are fixed on a platform 19 through a support 24. The in-situ seepage measuring device for rock materials is arranged on an experimental platform 19 and is positioned between an incident rod 21 and a transmission rod 22. The axial preloading device 20 and the rock material in-situ seepage measuring device are connected with the oil pump 18 through the oil pipe 17. The split Hopkinson pressure bar is used for providing dynamic loading test conditions, the axial preloading device 20 is used for providing preloading axial stress, and the rock material in-situ seepage measurement device transmits the preloading axial stress to the transmission striker 5 through the transmission rod 22 and further transmits the preloading axial stress to the sample 6 so as to preload the axial stress of the sample. After the bullet 23 is fired, it collides with the incident rod 12 in a centering manner to generate a series of compression stress waves, which are transmitted to the incident rod 4 along the incident rod 21, then transmitted to the sample 6, and further transmitted to the transmission rod 5 and the transmission rod 22.
The rock material in-situ seepage measurement method based on the Hopkinson bar specifically comprises the following working process description:
and 3, starting the axial preloading device 20 to pre-apply axial stress smaller than 1MPa to the sample 6, and clamping the sample stably. After the axial pre-pressure is applied, the oil pump 18 injects oil into the oil cylinder 1 through the oil injection hole 15, the exhaust hole 15 exhausts the air outwards while injecting the oil, the exhaust hole 15 starts to exhaust the oil after exhausting the air, and when the oil exhaust flow is uniform and stable, the oil exhaust valve is closed. The oil pump 18 is started to apply pressure to the oil in the oil cylinder 1, and confining pressure loading is achieved. The pressure levels of the oil pump 18, the axial preloading device 20 and the servo hydraulic (or pneumatic) press 13 are synchronously adjusted, and the three jointly apply the pressure to a preset pressure value. It should be noted that the pressure in the oil cylinder 1 of the device and the pressure in the axial preloading device 20 are always kept to be increased synchronously in the process of applying the pressure, and the pressure in the axial preloading device 20 is always slightly larger than the pressure in the oil cylinder 1;
And 6, if the loading is required to be continued and the permeability coefficient change is measured, repeating the step 5.
And 7, after the experiment is finished, firstly discharging the water pressure through a servo hydraulic press (or pneumatic press) 13, secondly discharging the axial pressure through an oil pump 18, and finally discharging the confining pressure through the oil pump 18. The oil in the oil cylinder 1 is recovered through the exhaust hole 15 and the oil pipe 17. The heat shrinkable tube 7 was removed, and the sample 6 was taken out.
Claims (2)
1. A rock material in-situ seepage measurement system based on a Hopkinson bar is characterized by comprising a platform (19), a separated Hopkinson pressure bar and a rock material in-situ seepage measurement device;
the split Hopkinson pressure bar is used for providing a dynamic loading test condition;
the axial preloading device (20) is used for providing preloading axial stress;
the rock material in-situ seepage measuring device transmits the pre-loading axial stress to the transmission plunger (5) through the transmission rod (22) and then to the sample (6) so as to pre-load the axial stress of the sample (6);
wherein:
the structure of the split Hopkinson pressure bar comprises a bullet (23), an incident rod (21), a momentum trap (25), a transmission rod (22) and an axial preloading device (20), the components are fixed on the platform (19) through a support (24), the rock material in-situ seepage measuring device is arranged on the platform (19) and is positioned between the incident rod (21) and the transmission rod (22), the axial preloading device (20 and the improved rock material in-situ seepage measuring device are connected with an oil pump (18) through an oil pipe (17); after the bullet (23) is shot, the bullet and the incident rod (12) collide in a centering way to generate a row of compression stress waves, the stress wave is transmitted to the sample (6) after being transmitted to the incident striker (4) along the incident rod (21), and then is continuously transmitted to the transmission striker (5) and the transmission rod (22);
rock material normal position seepage flow measuring device is including setting up hydro-cylinder (1) on platform (19), incident riser (2), transmission riser (3), incident lance (4), transmission lance (5), pyrocondensation pipe (7), sealed tile (8), guide rail bracket (9) and guide rail (10), and the concrete structure is:
the incident vertical plate (2) and the guide rail bracket (9) are fixedly connected with the platform (19) through bolts respectively; the guide rail bracket (9) and the incident vertical plate (2) are fixedly connected with two guide rails (10), the lower part of the transmission vertical plate (3) is provided with two round holes with the same diameter as the guide rails (10), and the guide rails (10) penetrate through the round holes on the transmission vertical plate (3) to support the transmission vertical plate (3) and enable the transmission vertical plate (3) to freely slide on the guide rails (10); an oil cylinder (1) is arranged between the incident vertical plate (2) and the transmission vertical plate (3), round holes with the same diameter as the incident striker (4) and the transmission striker (5) are formed in the centers of the incident vertical plate (2) and the transmission vertical plate (3), and the round holes can allow the incident striker (4) and the transmission striker (5) to pass through and move freely; the incident vertical plate (2), the transmission vertical plate (3) and the oil cylinder (1) are fixed and clamped; annular grooves with the same size as the inner diameter and the outer diameter of the oil cylinder (1) are formed in the inner sides of the incident vertical plate (2) and the transmission vertical plate (3), so that the oil cylinder (1), the incident vertical plate (2) and the transmission vertical plate (3) are in embedded fit, the oil cylinder (1) becomes a pressure container when in work, and certain pressure is kept in the oil cylinder; an oil filling hole (15) and an exhaust hole (16) are formed in the incident vertical plate (2), and the oil filling hole (15) is connected with an oil pump (18) through an oil pipe (17); after the incident vertical plate (2), the transmission vertical plate (3) and the oil cylinder (1) are clamped, hydraulic oil is injected into the oil cylinder (1) through an oil pump (18) and an oil pipe (17) through an oil injection hole (15), air in the oil cylinder (1) is discharged through an exhaust hole (16) until the oil cylinder (1) is filled with the hydraulic oil, and then the pressure in the oil cylinder (1) is increased, so that pre-confining pressure loading is carried out on a sample (6); the centers of the inner parts of the incident impact rod (4) and the transmission impact rod (5) are provided with water injection holes (11), one ends of the water injection holes (11) are communicated with the outer side surfaces of the incident impact rod (4) and the transmission impact rod (5) which are positioned outside the oil cylinder (1), and are connected with a servo hydraulic press (13) through water pipes (12); the other end of the water injection hole (11) is perforated from the bottom surfaces of the incident impact bar (4) and the transmission impact bar (5) in the oil cylinder (1).
2. A rock material in-situ seepage measurement method based on Hopkinson bars is characterized by comprising the following steps:
step 1, assembling a separated Hopkinson pressure bar and an improved rock material in-situ seepage measurement device completely;
step 2, clamping the fully saturated sample (6) between a sealing tile (8) and an incident ram (4) and a transmission ram (5), and tightly wrapping the outside of the sample by using a heat-shrinkable tube (7); after loading is finished, the transmission vertical plate (3) moves to the incident side along the guide rail (10) again, is in close contact with the oil cylinder (1), and fixes and tightens the incident vertical plate (2), the oil cylinder (1) and the transmission vertical plate (3);
step 3, starting the axial preloading device (20) to pre-apply axial stress smaller than 1MPa to the sample (6) and stably clamping the sample; after the application of the axial pre-pressure is finished, the oil pump (18) injects oil into the oil cylinder (1) through the oil injection hole (15), the exhaust hole (15) exhausts the air outwards while injecting the oil, the exhaust hole (15) starts to exhaust the oil after exhausting the air, and when the oil exhaust flow is uniform and stable, the oil exhaust valve is closed; an oil pump (18) is started to apply pressure to oil in the oil cylinder (1) to realize confining pressure loading; the pressure of the oil pump (18), the axial preloading device (20) and the servo hydraulic press (13) is synchronously adjusted, the three apply pressure to a preset pressure value, the pressure in the oil cylinder (1) of the device and the pressure in the axial preloading device (20) are always kept to be synchronously increased in the pressure applying process, and the pressure in the axial preloading device (20) is always slightly larger than the pressure in the oil cylinder (1);
step 4, after confining pressure is applied, applying pressure difference to the sample (6) through a servo hydraulic press (13) to enable seepage flow of the sample to be stable, and measuring an initial permeability coefficient of the sample by keeping the pressure difference unchanged;
step 5, after the steps are completed, dynamically loading the sample (6) through a separated Hopkinson bar, strictly controlling the load size in the loading process to enable the sample not to be crushed, absorbing redundant reflected waves through a momentum trap (25) to enable the sample (6) to be loaded only by single stress wave, and accurately obtaining the permeability coefficient of the rock sample under the action of the single load by recording the flow change of a servo hydraulic press;
step 6, if the loading is needed to be continued and the permeability coefficient change is measured, repeating the step 5;
and 7, removing water pressure through a servo water press (13), removing axial pressure through an oil pump (18), finally removing confining pressure through the oil pump (18), recovering oil in the oil cylinder (1) through an exhaust hole (15) and an oil pipe (17), dismantling the heat-shrinkable tube (7), and taking out the sample (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911125368.XA CN110865012B (en) | 2019-11-18 | 2019-11-18 | Rock material in-situ seepage measurement system and method based on Hopkinson bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911125368.XA CN110865012B (en) | 2019-11-18 | 2019-11-18 | Rock material in-situ seepage measurement system and method based on Hopkinson bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110865012A true CN110865012A (en) | 2020-03-06 |
| CN110865012B CN110865012B (en) | 2024-04-19 |
Family
ID=69654881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911125368.XA Active CN110865012B (en) | 2019-11-18 | 2019-11-18 | Rock material in-situ seepage measurement system and method based on Hopkinson bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110865012B (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014245A (en) * | 2020-08-13 | 2020-12-01 | 中国人民解放军空军工程大学 | Hopkinson pressure bar device for high-water-pressure rock breaking test and using method |
| CN112268806A (en) * | 2020-10-14 | 2021-01-26 | 合肥工业大学 | Confining pressure loading device based on separated Hopkinson pressure bar |
| CN112858024A (en) * | 2021-01-27 | 2021-05-28 | 天津大学 | Device and method for measuring dynamic performance of deep rock under action of hydraulic coupling |
| CN113281178A (en) * | 2021-05-19 | 2021-08-20 | 中国人民解放军国防科技大学 | Hydraulic fracturing experimental device and method based on separated Hopkinson pressure bar |
| CN114720266A (en) * | 2022-05-11 | 2022-07-08 | 天津大学 | Multi-field coupling dynamic loading device and experimental method |
| CN116593280A (en) * | 2023-06-20 | 2023-08-15 | 天津大学 | Confining pressure loading device based on Hopkinson bar |
| CN116609171A (en) * | 2023-06-20 | 2023-08-18 | 天津大学 | Composite loading device based on Hopkinson bar |
| CN116773328A (en) * | 2023-06-25 | 2023-09-19 | 中国地质大学（北京） | True triaxial hopkinson pressure bar test device |
| CN117110093A (en) * | 2022-12-07 | 2023-11-24 | 天津大学 | Mechanical test device and test method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893531A (en) * | 2010-07-20 | 2010-11-24 | 中国工程物理研究院总体工程研究所 | High-temperature Hopkinson pressure bar experimental system with atmosphere protection device |
| CN103471938A (en) * | 2013-08-24 | 2013-12-25 | 中国人民解放军陆军军官学院 | T-shaped Hopkinson torsion bar device |
| CN103616279A (en) * | 2013-11-13 | 2014-03-05 | 中国人民解放军空军工程大学 | Circumferential pressurizing device for large-diameter Hopkinson pressure bar |
| CN104819926A (en) * | 2015-05-20 | 2015-08-05 | 河海大学 | Multi-field coupling penetration test device and method for cracked rock |
| CN104865176A (en) * | 2015-05-27 | 2015-08-26 | 河南理工大学 | Seepage experiment system and method for gas-containing coal under action of impact load |
| CN106370533A (en) * | 2016-08-22 | 2017-02-01 | 中钢集团马鞍山矿山研究院有限公司 | System for carrying out dynamic triaxial test by using high frequency circulating water pressure |
| CN106706197A (en) * | 2016-11-16 | 2017-05-24 | 哈尔滨工程大学 | Subaqueous explosion pressure measurement device based on improved Hopkinson bar |
| CN107764641A (en) * | 2017-09-28 | 2018-03-06 | 清华大学 | The synergy of oil pressure hydraulic pressure aids in split hopkinson press bar confined pressure bringing device |
| CN108375501A (en) * | 2018-01-25 | 2018-08-07 | 南京理工大学 | A kind of data processing method based on split hopkinson press bar experimental technique |
| CN208313767U (en) * | 2018-02-07 | 2019-01-01 | 西安理工大学 | A kind of rock stress coupling test instrument |
-
2019
- 2019-11-18 CN CN201911125368.XA patent/CN110865012B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893531A (en) * | 2010-07-20 | 2010-11-24 | 中国工程物理研究院总体工程研究所 | High-temperature Hopkinson pressure bar experimental system with atmosphere protection device |
| CN103471938A (en) * | 2013-08-24 | 2013-12-25 | 中国人民解放军陆军军官学院 | T-shaped Hopkinson torsion bar device |
| CN103616279A (en) * | 2013-11-13 | 2014-03-05 | 中国人民解放军空军工程大学 | Circumferential pressurizing device for large-diameter Hopkinson pressure bar |
| CN104819926A (en) * | 2015-05-20 | 2015-08-05 | 河海大学 | Multi-field coupling penetration test device and method for cracked rock |
| CN104865176A (en) * | 2015-05-27 | 2015-08-26 | 河南理工大学 | Seepage experiment system and method for gas-containing coal under action of impact load |
| CN106370533A (en) * | 2016-08-22 | 2017-02-01 | 中钢集团马鞍山矿山研究院有限公司 | System for carrying out dynamic triaxial test by using high frequency circulating water pressure |
| CN106706197A (en) * | 2016-11-16 | 2017-05-24 | 哈尔滨工程大学 | Subaqueous explosion pressure measurement device based on improved Hopkinson bar |
| CN107764641A (en) * | 2017-09-28 | 2018-03-06 | 清华大学 | The synergy of oil pressure hydraulic pressure aids in split hopkinson press bar confined pressure bringing device |
| CN108375501A (en) * | 2018-01-25 | 2018-08-07 | 南京理工大学 | A kind of data processing method based on split hopkinson press bar experimental technique |
| CN208313767U (en) * | 2018-02-07 | 2019-01-01 | 西安理工大学 | A kind of rock stress coupling test instrument |
Non-Patent Citations (1)
| Title |
|---|
| 宫凤强;李夕兵;刘希灵;: "一维动静组合加载下砂岩动力学特性的试验研究", 岩石力学与工程学报, no. 10, 15 October 2010 (2010-10-15), pages 2076 - 2085 * |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112014245A (en) * | 2020-08-13 | 2020-12-01 | 中国人民解放军空军工程大学 | Hopkinson pressure bar device for high-water-pressure rock breaking test and using method |
| CN112268806B (en) * | 2020-10-14 | 2023-04-14 | 合肥工业大学 | Confining pressure loading device based on separated Hopkinson pressure bar |
| CN112268806A (en) * | 2020-10-14 | 2021-01-26 | 合肥工业大学 | Confining pressure loading device based on separated Hopkinson pressure bar |
| CN112858024A (en) * | 2021-01-27 | 2021-05-28 | 天津大学 | Device and method for measuring dynamic performance of deep rock under action of hydraulic coupling |
| CN112858024B (en) * | 2021-01-27 | 2023-09-22 | 天津大学 | Device and method for measuring dynamic performance of deep rock under hydraulic coupling effect |
| CN113281178A (en) * | 2021-05-19 | 2021-08-20 | 中国人民解放军国防科技大学 | Hydraulic fracturing experimental device and method based on separated Hopkinson pressure bar |
| CN114720266A (en) * | 2022-05-11 | 2022-07-08 | 天津大学 | Multi-field coupling dynamic loading device and experimental method |
| CN117110093A (en) * | 2022-12-07 | 2023-11-24 | 天津大学 | Mechanical test device and test method |
| CN117110093B (en) * | 2022-12-07 | 2024-05-10 | 天津大学 | Mechanical test device and test method |
| CN116593280A (en) * | 2023-06-20 | 2023-08-15 | 天津大学 | Confining pressure loading device based on Hopkinson bar |
| CN116609171A (en) * | 2023-06-20 | 2023-08-18 | 天津大学 | Composite loading device based on Hopkinson bar |
| CN116609171B (en) * | 2023-06-20 | 2024-03-05 | 天津大学 | Composite loading device based on Hopkinson bar |
| CN116773328A (en) * | 2023-06-25 | 2023-09-19 | 中国地质大学（北京） | True triaxial hopkinson pressure bar test device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110865012B (en) | 2024-04-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110865012A (en) | Rock material in-situ seepage measurement system and method based on Hopkinson bar | |
| CN112858024B (en) | Device and method for measuring dynamic performance of deep rock under hydraulic coupling effect | |
| Zeng et al. | Cement sheath sealing integrity evaluation under cyclic loading using large-scale sealing evaluation equipment for complex subsurface settings | |
| CN110595909B (en) | True triaxial test system and method for simulating deep rock mass under different temperature influences | |
| CN112557203A (en) | Hot hydraulic coupling triaxial test method for fractured rock | |
| US11921088B2 (en) | Thermal-stress-pore pressure coupled electromagnetic loading triaxial Hopkinson bar system and test method | |
| CN110441172B (en) | Osmotic pressure and static pressure coupling electromagnetic loading triaxial SHPB device and test method | |
| CN103760028B (en) | The confined pressure charger of use for laboratory rock testing | |
| Zhang et al. | Experimental study on explosion pressure and rock breaking characteristics under liquid carbon dioxide blasting | |
| Thill | Acoustic methods for monitoring failure in rock | |
| CN104535727A (en) | Hydraulic sand fracturing system | |
| CN114060006B (en) | Device for testing strength and sealing performance of cement sheath after perforation and application method thereof | |
| CN109269905B (en) | Rock test device and method for simulating high-humidity acidic environment state | |
| CN116411959A (en) | Oil-gas well fracturing test device and method for simulating real stratum environment | |
| He et al. | Experiments on rock burst and its control | |
| Tian et al. | Effects of confining pressure on mechanical properties and damage evolution of granite under cyclic impact loading | |
| CN114002072B (en) | Fracture rock hydraulic coupling test device and method for applying constant fracture water pressure | |
| CN113092271B (en) | Supercritical fluid generation device, coal rock mechanical test system and test method | |
| CN116165062A (en) | Coalbed rock deformation and crack expansion detection device under different unloading conditions | |
| Zheng et al. | A novel experimental apparatus for evaluating coal-and-gas outburst risk | |
| Pan et al. | Development and application of a hydraulic impact test machine for simulating rockburst conditions | |
| CN114018779A (en) | Loading path method for measuring triaxial seepage characteristics of fractured rock | |
| XU et al. | Experimental study on effect of initial static pore water pressure on static and dynamic shear properties of sand | |
| CN117740567A (en) | Rock dynamic response testing device and method in deep multi-field coupling environment | |
| CN117571482A (en) | Rock dynamics experiment device and method under high ground stress and high permeability water pressure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |