CN214173964U - Rock dynamic and static true/normal triaxial shear rheological THMC multi-field coupling test device - Google Patents
Rock dynamic and static true/normal triaxial shear rheological THMC multi-field coupling test device Download PDFInfo
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- CN214173964U CN214173964U CN202022467458.1U CN202022467458U CN214173964U CN 214173964 U CN214173964 U CN 214173964U CN 202022467458 U CN202022467458 U CN 202022467458U CN 214173964 U CN214173964 U CN 214173964U
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Abstract
The utility model discloses a many field coupling test devices of rock sound true/normal triaxial shear flow THMC. The device comprises a static loading main structure, a static loading system, a dynamic loading system, a seepage measurement system, a temperature test system, an ultrasonic test system and an acoustic emission test system; the static force loading system, the dynamic force loading system, the seepage flow measuring system, the temperature testing system, the ultrasonic testing system and the acoustic emission testing system are all arranged on the static force loading main body structure. The utility model has the advantages of multiple functions and wide application.
Description
Technical Field
The utility model relates to a many field coupling test technical field such as rock dynamic load, static load, true/ordinary triaxial, shearing, rheology, temperature, seepage flow, chemistry specifically indicate a many field coupling test device of rock sound true/ordinary triaxial shear rheology THMC.
Background
The rock triaxial test is an important means for researching rock mechanics, and rock triaxial test data is an important parameter of rock mechanics, can relatively and completely simulate the mechanical property of rock and soil in an original ground stress state, and is an important basis for engineering design. With the increasing deep rock engineering in China, the faced engineering geological problems are more and more complex, including the difficult problems of active faults, high ground stress, high ground temperature, high groundwater and the like, so that how to simulate the mechanical test under different environmental conditions in a laboratory is a key scientific problem of rock mechanics.
The existing triaxial compression equipment can mainly realize tests such as uniaxial compression, conventional triaxial compression, true triaxial compression, dynamic impact, rheology and the like, but lacks a multi-field coupling triaxial test testing device considering dynamic load, static load, shear, rheology, temperature, seepage, chemistry, ultrasonic waves, acoustic emission and the like.
Therefore, there is a need to develop a device capable of performing high-temperature and high-pressure shear seepage tests, ultrasonic tests, acoustic emission tests and rheological tests, and providing multi-field coupling tests for dynamic load, static load, shear, rheology, temperature, seepage, chemistry and the like of rocks.
Disclosure of Invention
The utility model aims at providing a many field coupling test device of rock sound normal triaxial shear flow THMC, the function is many, be suitable for extensively, can carry out high temperature high pressure shear seepage flow test, ultrasonic testing, acoustic emission test, rheological test, provide many field coupling tests such as rock dynamic loading, static loading, shearing, rheology, temperature, seepage flow, chemistry.
In order to realize the purpose, the technical scheme of the utility model is that: the rock dynamic and static true/normal triaxial shear rheological THMC multi-field coupling test device is characterized in that: the device comprises a static loading main structure, a static loading system, a dynamic loading system, a seepage measurement system, a temperature test system, an ultrasonic test system and an acoustic emission test system;
the static force loading system, the dynamic force loading system, the seepage flow measuring system, the temperature testing system, the ultrasonic testing system and the acoustic emission testing system are all arranged on the static force loading main body structure.
In the technical scheme, the static loading main structure comprises a confining pressure chamber, a confining pressure chamber base, a confining pressure chamber upper end cover plate, an axial static loading oil cylinder and a horizontal static loading oil cylinder;
the upper end of the confining pressure chamber is provided with a confining pressure chamber upper end cover plate, and the lower end of the confining pressure chamber is provided with a confining pressure chamber base; the axial static force loading oil cylinder is arranged above the confining pressure chamber; the horizontal static force loading oil cylinder is arranged on the side wall of the confining pressure chamber.
In the technical scheme, one end of the seepage measurement system extends into the confining pressure chamber and is connected with the lower end of the rock sample, and the other end of the seepage measurement system extends into the confining pressure chamber and is connected with the upper end of the rock sample;
the temperature testing system is sleeved on the periphery of the confining pressure chamber;
the ultrasonic testing system is connected to the upper end and the lower end of the rock sample;
the acoustic emission testing system is connected to the side wall of the rock sample.
In the above technical scheme, the static loading system includes an axial loading rod, an axial static loading oil cylinder oil filling hole, an axial static loading oil cylinder, an axial static unloading oil cylinder oil filling hole, an axial static loading pressure sensor, a horizontal loading rod, a horizontal loading oil cylinder oil filling hole, a horizontal static loading oil cylinder and a horizontal static unloading oil filling hole;
the axial loading rod is connected with the axial static force loading oil cylinder in a sliding manner;
and the horizontal loading rod is in sliding connection with the horizontal static force loading oil cylinder.
In the technical scheme, the dynamic loading system is positioned on the periphery of the static loading main body structure and is connected with the static loading system.
The THMC multi-field coupling refers to temperature-seepage-stress-chemical (thermo-hydro-mechanical-chemical) multi-field coupling. Compared with the prior art, the utility model has the advantages of as follows:
(1) the utility model discloses utilize the self-balancing loading system (self-balancing system means that the power that needs to increase in the test process is balanced by self structure, need not offset the power in the test with the help of other structures), can realize the conventional triaxial test of rock, change corresponding cushion, can realize the true triaxial test of rock;
(2) the utility model can realize the conventional triaxial and true triaxial dynamic loading tests of the rock by utilizing the dynamic loading device on the counter-force frame;
(3) the utility model discloses utilize static loading major structure, static loading system, dynamic loading system B, stress measurement system, seepage flow measurement system and temperature test system, realize temperature-seepage flow-mechanics-chemistry (THMC) multi-field coupling test, can carry out the rock true normal triaxial test of axial and horizontal to dynamic loading simultaneously;
(4) the utility model discloses utilize static loading major structure, static loading system, power loading system B, stress measurement system, seepage flow measurement system, temperature test system and acoustic emission test system, realize temperature-seepage flow-mechanics-chemistry (THMC) multi-field coupling test and axial and level to the dynamic loading test, can carry out high temperature high pressure acoustic emission test simultaneously, realize that the rock inside crazing line in the THMC multi-field coupling test process forms, expands and link up the overall process experiment;
(5) the utility model discloses utilize static loading major structure, static loading system, dynamic loading system B, stress measurement system, seepage flow measurement system, temperature test system and ultrasonic testing system, realize temperature-seepage flow-mechanics-chemistry (THMC) multi-field coupling test and axial and horizontal to dynamic loading test, can carry out high temperature high pressure ultrasonic testing simultaneously, realize the ultrasonic testing experiment of the rock overall process of breaking in the THMC multi-field coupling test process;
(6) the utility model discloses utilize static loading major structure, static loading system, dynamic loading system B, stress measurement system, displacement measurement system, seepage flow measurement system and temperature test system, realize temperature-seepage flow-mechanics-chemistry (THMC) multi-field coupling test and axial and horizontal to dynamic loading test, can carry out high temperature high pressure shearing seepage flow test simultaneously, realize the permeability test of the rock overall process of breaking in the THMC multi-field coupling test process;
(7) the utility model utilizes the static loading main structure, the static loading system, the stress measuring system, the displacement measuring system, the seepage measuring system and the temperature testing system to realize the temperature-seepage-mechanics-chemistry (THMC) multi-field coupling test and simultaneously can carry out high-temperature high-pressure rheological test; the change rule of the mechanical property of the rock along with time in the THMC multi-field coupling test process is researched, and the timeliness of the mechanical property of the rock under complex conditions is researched;
(8) the utility model discloses utilize static loading major structure, static loading system, stress measurement system, displacement measurement system, seepage flow measurement system, temperature test system, ultrasonic testing system and acoustic emission test system, realize temperature-seepage flow-mechanics-chemistry (THMC) multi-field coupling test and axial and level to dynamic loading test, can carry out high temperature high pressure shearing seepage flow test, ultrasonic testing, acoustic emission test, rheology test simultaneously, provide many fields coupling test techniques such as rock dynamic load, static load, shearing, rheology, temperature, seepage flow, chemistry;
(9) the utility model discloses utilize power loading device, temperature, seepage flow, ultrasonic wave and acoustic emission test system, realize temperature-seepage flow-mechanics-chemistry (THMC) multi-field coupling test and axial and level to power loading test, can carry out experiments such as high temperature high pressure shear seepage flow test, ultrasonic testing, acoustic emission test, rheology simultaneously, perfect the functionality of equipment;
(10) the utility model discloses set up confining pressure room left side steel cushion, confining pressure room right side steel cushion on confining pressure room base, confining pressure room left side steel cushion places the left side spring in the bottom, sample base cushion sets up between rock sample and confining pressure room base, sample left side cushion sets up on sample base cushion, sample upper end cushion sets up in sample left side cushion lateral wall upper end, the lower extreme spring sets up in confining pressure room base top, the rock sample sets up in sample base cushion, confining pressure room base, sample left side cushion, sample upper end cushion, in the space that left side spring and lower extreme spring enclose, guarantee among the true triaxial test process, the static force loads major structure, the static force loading system, system such as dynamic loading system can full end face contact rock sample, and load stress, guarantee that the testing result is accurate; the defect that the height of the side steel plate of the existing true triaxial test is slightly less than the height of a sample, the side of the sample cannot be completely contacted, and the situation that the stress cannot be loaded by a few millimeters reserved at the upper end part and the lower end part, and the detection result is inaccurate is overcome.
The utility model discloses collect many field coupling test functions in an organic whole such as rock dynamic load, static load, true/normal triaxial, shearing, rheology, temperature, seepage flow, save the cost, the function is many, be suitable for extensively, can realize temperature-seepage flow-mechanics-chemistry (THMC) many field coupling test and axial and level to the dynamic load test, can carry out high temperature high pressure shearing seepage flow test, ultrasonic testing, acoustic emission test, rheology test simultaneously, be one kind use more extensively, the function is more, the operation is more simple and convenient, the experimental mode more accords with the multi-functional many field coupling test system of rock mechanics of engineering.
Drawings
Figure 1 is the utility model discloses rock sound normal triaxial shear flow change THMC multi-field coupling test device schematic diagram.
Fig. 2 is a schematic diagram of the temperature testing system of the present invention.
Fig. 3 is a schematic view of the gas permeation testing system of the present invention.
Fig. 4 is a schematic view of the liquid seepage testing system of the present invention.
Fig. 5 is a schematic diagram of true triaxial loading according to the present invention.
Fig. 6 is a schematic view of the arrangement of the confining pressure chamber and the seepage pipeline of the present invention.
Figure 7 is the utility model discloses a rock sample installation schematic diagram among the shear seepage flow test.
Fig. 8 is a schematic view of the shear ram of the present invention.
Fig. 9 is a schematic view of the acoustic emission testing system of the present invention.
Fig. 10 is a schematic view of a second acoustic emission testing system according to the present invention.
Fig. 11 is a schematic view of the ultrasonic testing system of the present invention.
In the figure: 1-a horizontal left side pressure sensor, 2-a counterforce frame, 3-a horizontal left side loading device, 4-a confining pressure chamber left side steel cushion block, 5-a confining pressure chamber, 6-an exhaust hole, 7-a confining pressure chamber fastening bolt, 8-an axial loading rod, 9-an axial dynamic loading device, 10-an axial dynamic loading pressure sensor, 11-an axial static loading oil cylinder oil filling hole, 12-an axial static loading oil cylinder, 13-an axial static unloading oil cylinder oil filling hole, 14-a confining pressure chamber upper end cover plate, 15-an axial static loading pressure sensor, 16-a horizontal static loading pressure sensor, 17-a horizontal dynamic loading device, 18-a horizontal dynamic loading pressure sensor, 19-a horizontal loading rod and 20-a horizontal loading oil cylinder oil filling hole, 21-horizontal static force loading oil cylinder, 22-horizontal static force loading oil cylinder fastening bolt, 23-horizontal static force unloading oil filling hole, 24-lower end liquid/gas seepage pipeline, 25-lower end spring, 26-left side spring, 27-upper end liquid/gas seepage pipeline, 28-confining pressure chamber base, 29-sample base cushion block, 30-sample left side cushion block, 31-sample upper end cushion block, 32-right side steel cushion block, 33-sample right side cushion block34-sample, 35-confining pressure chamber oil filling hole, 36-confining pressure chamber oil discharging hole, 37-upper semicircular rubber pad, 38-lower semicircular rubber pad, 39-sample thermoplastic bushing, 40-sample upper end fastening ring, 41-sample lower end fastening ring, 42-heating jacket, 43-left side displacement sensor, 44-right side displacement sensor, 45-axial displacement sensor, 46-emergency stop button, 47-temperature controller, 48-temperature lowering setting button, 49-power switch, 50-temperature raising setting button, 51-temperature setting display screen, 52-actual temperature display screen, 53-exhaust port stop valve, 54-gas pressure gauge, 55-gas flow meter, 56-intake port stop valve, 57-gas cylinder port stop valve, 58-gas cylinder switch valve, 59-nitrogen cylinder, 60-liquid pressure gauge, 61-liquid flow meter, 62-upstream liquid stop valve, 63-seepage control system, 64-liquid collection container, 65-downstream liquid stop valve, 66-acoustic emission probe, 67-acoustic emission signal lead, 68-acoustic emission test system, 69-ultrasonic test system, 70-ultrasonic emission probe, 71-ultrasonic emission probe pressure bearing protection pressure head, 72-ultrasonic emission probe pressure spring, 73-ultrasonic receiving probe, 74-ultrasonic receiving probe pressure bearing protection pressure head, 75-ultrasonic receiving probe pressure spring, 76-ultrasonic signal lead, R-static loading main structure, a-static force loading system, B-dynamic force loading system, P-stress measuring system, D-displacement measuring system, E-seepage measuring systemQA gas permeation system, EL-a liquid seepage system, an F-temperature testing system, a Q-ultrasonic testing system, an S-acoustic emission testing system.
Detailed Description
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the invention will be clear and readily appreciated by the description.
With reference to the accompanying drawings: the rock dynamic and static true/normal triaxial shear rheological THMC multi-field coupling test device comprises a static loading main structure R, a static loading system A, a dynamic loading system B, a stress measurement system P, a displacement measurement system D, a seepage measurement system E, a temperature measurement system F, an ultrasonic test system Q and an acoustic emission test system S (shown in figures 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10);
the static loading main structure R comprises a confining pressure chamber 5, a confining pressure chamber base 28, a confining pressure chamber upper end cover plate 14, an axial static loading oil cylinder 12 and a horizontal static loading oil cylinder 21;
the upper end of the confining pressure chamber 5 is provided with a confining pressure chamber upper end cover plate 14, and the lower end is provided with a confining pressure chamber base 28; the axial static force loading oil cylinder 12 is arranged above the confining pressure chamber 5; the horizontal static force loading oil cylinder 21 is arranged on the side wall of the confining pressure chamber 5;
the confining pressure chamber upper end cover plate 14 is connected with the confining pressure chamber base 28 through the confining pressure chamber fastening bolt 7; the exhaust hole 6 is arranged on the cover plate 14 at the upper end of the confining pressure chamber; the confining pressure chamber oil filling hole 35 is positioned on the confining pressure chamber upper end cover plate 14, and the confining pressure chamber oil discharging hole 36 is positioned on the confining pressure chamber base 28 (as shown in fig. 1);
the static force loading system A, the dynamic force loading system B, the stress measurement system P, the displacement measurement system D, the seepage measurement system E, the temperature test system F, the ultrasonic test system Q and the acoustic emission test system S are all arranged on the static force loading main structure R (as shown in figure 1); the utility model discloses collect many field coupling test functions in an organic whole such as rock dynamic load, static load, true/normal triaxial, shearing, rheology, temperature, seepage flow, save the cost, the function is many, be suitable for extensively, can realize temperature-seepage flow-mechanics-chemistry (THMC) many field coupling test and axial and level to the dynamic loading test, can carry out high temperature high pressure shearing seepage flow test, ultrasonic testing, acoustic emission test, rheology test simultaneously.
Further, the static loading system a comprises an axial loading rod 8, an axial static loading oil cylinder oil filling hole 11, an axial static loading oil cylinder 12, an axial static unloading oil cylinder oil filling hole 13, an axial static loading pressure sensor 15, a horizontal static loading pressure sensor 16, a horizontal loading rod 19, a horizontal loading oil cylinder oil filling hole 20, a horizontal static loading oil cylinder 21 and a horizontal static unloading oil filling hole 23;
the axial loading rod 8 is connected with the axial static loading oil cylinder 12 in a sliding mode in the longitudinal direction, and one end of the axial loading rod extends out of the static loading oil cylinder 12, the confining pressure chamber upper end cover plate 14 and is located in the confining pressure chamber 5 in sequence;
the axial static force loading oil cylinder oil filling hole 11 and the axial static force unloading oil cylinder oil filling hole 13 are respectively positioned on the axial static force loading oil cylinder 12 and are communicated with the axial static force loading oil cylinder 12; wherein, the axial static loading cylinder oil filling hole 11 is located at the top end of the axial static loading cylinder 12, and the axial static unloading cylinder oil filling hole 13 is located at the lower end of the side wall of the axial static loading cylinder 12 (as shown in fig. 1, fig. 3 and fig. 4);
the horizontal loading rod 19 is connected with the horizontal static loading oil cylinder 21 in a sliding mode in the transverse direction, and one end of the horizontal loading rod extends out of the horizontal static loading oil cylinder 21 and is located in the confining pressure chamber 5;
the horizontal loading oil cylinder oil filling hole 20 and the horizontal static unloading oil filling hole 23 are respectively positioned on the horizontal static loading oil cylinder 21 and are communicated with the horizontal static loading oil cylinder 21; the horizontal static force unloading oil filling hole 23 is positioned at the lower end of the side wall of the horizontal static force loading oil cylinder 21; the utility model provides a static loading major structure R and static loading system A can realize the conventional triaxial test of rock for self-balancing loading system, change corresponding cushion, can realize the true triaxial test of rock.
Further, the dynamic loading system B is positioned on the periphery of the static loading main structure R and is connected with the static loading system A;
the power loading system B comprises a counterforce frame 2, a horizontal left side loading device 3, an axial power loading device 9, an axial power loading pressure sensor 10, a horizontal power loading device 17 and a horizontal power loading pressure sensor 18;
the axial power loading device 9 is positioned on the inner wall of the top end of the counterforce frame 2;
the axial loading rod 8 is connected with an axial dynamic loading device 9;
the horizontal left loading device 3 and the horizontal power loading device 17 are oppositely positioned on the inner side wall of the reaction frame 2;
the horizontal left loading device 3 is in contact with the outer side wall of the confining pressure chamber 5;
the horizontal power loading device 17 is connected with a horizontal loading rod 19;
the confining pressure chamber base 28 is positioned on the inner wall of the bottom surface of the counterforce frame 2 (shown in figure 1); the utility model discloses utilize the power loading device on the counter-force frame, can realize conventional triaxial of rock and true triaxial power loading test.
Further, the stress measurement system P comprises a horizontal left pressure sensor 1, an axial dynamic loading pressure sensor 10, an axial static loading pressure sensor 15, a horizontal static loading pressure sensor 16 and a horizontal dynamic loading pressure sensor 18;
the horizontal left pressure sensor 1 is connected with the horizontal left loading device 3 and is positioned between the horizontal left loading device 3 and the outer side wall of the confining pressure chamber 5;
the axial dynamic loading pressure sensor 10 is connected to the axial dynamic loading device 9 and is positioned between the axial loading rod 8 and the axial dynamic loading device 9;
the axial static loading pressure sensor 15 and the horizontal static loading pressure sensor 16 are both positioned in the confining pressure chamber 5, the axial static loading pressure sensor 15 is positioned at the end part of the axial loading rod 8, and the horizontal static loading pressure sensor 16 is positioned at the end part of the horizontal loading rod 19;
the horizontal power loading pressure sensor 18 is connected to the horizontal power loading device 17 and is located between the horizontal power loading device 17 and the horizontal loading rod 19 (as shown in fig. 1, 2, 3 and 4); the stress measurement system P is used for monitoring the stress of the conventional triaxial and true triaxial dynamic loading tests of the rock and feeding back data to the dynamic loading system B, so that parameters in the dynamic loading system B are adjusted.
Further, the steel cushion block 4 on the left side of the confining pressure chamber and the steel cushion block 32 on the right side of the confining pressure chamber are both positioned on the base 28 of the confining pressure chamber and are oppositely positioned on the inner side wall of the confining pressure chamber 5;
a left spring 26 is arranged at the bottom of the steel cushion block 4 at the left side of the confining pressure chamber, and the left spring 26 is positioned in a space enclosed by the steel cushion block 4 at the left side of the confining pressure chamber, a sample base cushion block 29 and a confining pressure chamber base 28;
the rock sample 34 is positioned in the confining pressure chamber 5, on the confining pressure chamber base 28 and between the confining pressure chamber left side steel cushion block 4 and the confining pressure chamber right side steel cushion block 32;
the sample base cushion block 29 is positioned between the rock sample 34 and the confining pressure chamber base 28; the sample left side cushion block 30 is positioned on the sample base cushion block 29 and is in contact with the inner wall of the confining pressure chamber left side steel cushion block 4;
the sample upper end cushion block 31 is positioned at the upper end of the side wall of the sample left side cushion block 30 and at the upper end of the sample right side cushion block 33;
the lower end spring 25 is positioned above the confining pressure chamber base 28, and the lower end spring 25 is positioned in a space enclosed by the confining pressure chamber base 28, the sample base cushion block 29, the confining pressure chamber right side steel cushion block 32 and the sample right side cushion block 33; the left spring 26 is used for reserving a reserved horizontal deformation space when horizontally compressed, and the lower spring 25 is used for reserving a vertical deformation space when vertically compressed;
the sample base cushion block 29, the sample left side cushion block 30, the sample upper end cushion block 31 and the sample right side cushion block 33 surround the periphery of the rock sample 34 and form a cubic structure;
the axial static loading pressure sensor 15 is positioned on the outer side wall of the cushion block 31 at the upper end of the sample;
the axial loading rod 8 is contacted with a cushion block 31 at the upper end of the sample; the axial static loading pressure sensor 15 is positioned between the axial loading rod 8 and the sample upper end cushion block 31 (shown in figures 1 and 5);
the horizontal static loading pressure sensor 16 is positioned on the outer side wall of the sample right side cushion block 33 (shown in figure 6);
the horizontal loading rod 19 passes through the right steel cushion block 32 of the confining pressure chamber and is contacted with the right cushion block 33 of the sample; the horizontal static force loading pressure sensor 16 is positioned between the horizontal loading rod 19 and the right cushion block 33 of the test sample; the structural stability is ensured, and the test is convenient; the utility model provides a static loading major structure R and static loading system A are self-balancing loading systems, can realize the conventional triaxial test of rock, change corresponding cushion, can realize the true triaxial test of rock; the test device can realize a temperature-seepage-mechanics-chemistry (THMC) multi-field coupling test and an axial and horizontal dynamic loading test, and can simultaneously perform a high-temperature high-pressure shear seepage test, an ultrasonic test, an acoustic emission test and a rheological test.
Further, the displacement measuring system D includes a left displacement sensor 43, a right displacement sensor 44 and an axial displacement sensor 45;
the left displacement sensor 43 and the right displacement sensor 44 are symmetrically arranged on the confining pressure chamber base 28 and are positioned on two sides of the sample base cushion block 29;
the axial displacement sensor 45 is mounted on the plenum base 28 and is located outside the right displacement sensor 44 (as shown in fig. 2, 3 and 4); the upper end of the axial displacement sensor 45 is in contact with the inner side wall of the cushion block 31 at the upper end of the sample; and the displacement measurement system D is used for monitoring the displacement conditions of conventional triaxial and true triaxial dynamic loading tests of the rock and feeding back data to the dynamic loading system B so as to adjust parameters in the dynamic loading system B.
Furthermore, one end of the seepage measurement system E extends into the confining pressure chamber 5 and is connected with the lower end of the rock sample 34, and the other end of the seepage measurement system E extends into the confining pressure chamber 5 and is connected with the upper end of the rock sample 34.
Further, the seepage measurement system E comprises a gas permeation system EQAnd a fluid seepage system EL(as shown in fig. 2, 3, 4, 7);
gas permeation System EQComprises a lower end liquid/gas seepage pipeline 24, an upper end liquid/gas seepage pipeline 27, an exhaust port stop valve 53, a gas pressure gauge 54, a gas flow gauge 55, an air inlet stop valve 56, a gas cylinder port stop valve 57, a gas cylinder switch valve 58 and a nitrogen cylinder 59 (shown in figures 3 and 8);
liquid seepage system ELComprises a lower end liquid/gas seepage pipeline 24, an upper end liquid/gas seepage pipeline 27, a liquid pressure gauge 60, a liquid flow gauge 61, an upstream liquid stop valve 62, a seepage control system 63, a liquid collecting container 64 and a downstream liquid stop valve 65 (shown in figures 4 and 8);
one end of the lower end liquid/gas seepage pipeline 24 extends upwards out of the sample upper end cushion block 31, and the other end of the lower end liquid/gas seepage pipeline extends out of the lower end of the side wall of the confining pressure chamber base 28 after being bent by 90 degrees in the confining pressure chamber base 28;
one end of the upper end liquid/gas seepage pipeline 27 extends into the confining pressure chamber 5 from the side wall of the sample upper end cushion block 31 and extends out of the confining pressure chamber 5 from the inner side wall of the sample upper end cushion block 31, and the other end of the upper end liquid/gas seepage pipeline extends out of the confining pressure chamber 5 from the lower end of the side wall of the confining pressure chamber base 28 after being bent by 90 degrees in the confining pressure chamber base 28 (as shown in fig. 2, 3 and 4);
in a gas permeation system EQA connecting pipeline between the lower end liquid/gas seepage pipeline 24 and a nitrogen gas bottle 59 is sequentially provided with an air inlet stop valve 56, a gas pressure gauge 54, a gas flow gauge 55 and a gas bottle opening stop valve 57; a gas cylinder switch valve 58 is arranged on the nitrogen gas cylinder 59; a gas flow meter 55, a gas pressure meter 54 and an exhaust port stop valve 53 (shown in fig. 3) are sequentially arranged on a communication pipeline between the upper end liquid/gas seepage pipeline 27 and the gas collecting device; gas permeation System EQThe device is used for realizing a temperature-gas seepage-mechanics-chemistry (THMC) multi-field coupling test and an axial and horizontal power loading test, and simultaneously can carry out a high-temperature high-pressure shear seepage test to realize the whole process test of the formation, expansion and communication of the internal microcracks of the rock in the THMC multi-field coupling test process;
in a fluid-permeable system ELIn the middle, an upstream liquid stop valve 62, a liquid pressure gauge 60 and a liquid flow gauge 61 are sequentially arranged on a connecting pipeline between the lower end liquid/gas seepage pipeline 24 and a seepage control system 63; a liquid flow meter 61, a pressure meter 60 and a downstream liquid stop valve 65 (shown in fig. 4) are sequentially arranged on a communication pipeline between the upper end liquid/gas seepage pipeline 27 and the liquid collecting container 64; liquid seepage system ELThe test device is used for realizing a temperature-gas seepage-mechanics-chemistry (THMC) multi-field coupling test and an axial and horizontal power loading test, and simultaneously can carry out a high-temperature high-pressure shear seepage test to realize the whole process test of forming, expanding and communicating the internal microcracks of the rock in the THMC multi-field coupling test process.
Further, the temperature test system F is sleeved on the periphery of the confining pressure chamber 5.
Further, the temperature testing system F includes a heating jacket 42, an emergency stop button 46, a temperature controller 47, a reduced temperature setting button 48, a power switch 49, an increased temperature setting button 50, a set temperature display screen 51 and an actual temperature display screen 52;
the heating jacket 42 is arranged on the periphery of the confining pressure chamber 5, the confining pressure chamber fastening bolt 7, the axial static loading oil cylinder 12, the confining pressure chamber upper end cover plate 14 and the confining pressure chamber base 28;
the heating jacket 42 is connected with a temperature controller 47; the temperature controller 47 is provided with an emergency stop button 46, a reduced temperature setting button 48, a power switch 49, a raised temperature setting button 50, a set temperature display screen 51 and an actual temperature display screen 52; the confining pressure chamber is heated by the heating sleeve 42 (as shown in fig. 2, 3 and 4), so that a rock sample is heated, a temperature-seepage-mechanics-chemistry (THMC) multi-field coupling test and an axial and horizontal dynamic loading test are realized, a high-temperature high-pressure shearing seepage test can be carried out, and a rock internal microcrack forming, expanding and penetrating whole-process test in the THMC multi-field coupling test process is realized.
Further, the ultrasonic testing system Q is connected to the upper and lower ends of the rock sample 34.
Further, the ultrasonic testing system Q comprises an ultrasonic testing system 69, an ultrasonic transmitting probe 70, an ultrasonic transmitting probe pressure-bearing protection pressure head 71, an ultrasonic transmitting probe pressure spring 72, an ultrasonic receiving probe 73, an ultrasonic receiving probe pressure-bearing protection pressure head 74, an ultrasonic receiving probe pressure spring 75 and an ultrasonic signal lead 76;
the upper end of the rock sample 34 is provided with the ultrasonic transmitting probe pressure-bearing protection pressure head 71, and the lower end is provided with the ultrasonic receiving probe pressure-bearing protection pressure head 74;
an ultrasonic emission probe pressing spring 72 is arranged on the ultrasonic emission probe pressure-bearing protection pressure head 71; the pressure-bearing protection pressure head 74 with the ultrasonic receiving probe at the lower end is provided with an ultrasonic receiving probe pressing spring 75;
the ultrasonic emission probe 70 is arranged on the ultrasonic emission probe pressure-bearing protection pressure head 71 through an ultrasonic emission probe pressure spring 72;
the ultrasonic receiving probe 73 is arranged on the ultrasonic receiving probe pressure-bearing protection pressure head 74 through an ultrasonic receiving probe pressure spring 75;
the ultrasonic transmitting probe 70 and the ultrasonic receiving probe 73 are respectively connected with an ultrasonic testing system 69 through an ultrasonic signal lead 76 (shown in FIG. 11); the test method realizes ultrasonic-temperature-seepage-mechanical-chemical (THMC) multi-field coupling test and axial and horizontal dynamic loading test, can simultaneously perform high-temperature high-pressure shear seepage test, ultrasonic test and rheological test, and realizes the whole process test of forming, expanding and communicating rock internal microcracks in the THMC multi-field coupling test process.
Further, the acoustic emission testing system S is attached to the side wall of the rock specimen 34.
Further, the acoustic emission testing system S includes an acoustic emission probe 66, an acoustic emission signal wire 67, and an acoustic emission testing system 68;
the acoustic emission probe 66 is disposed on a side wall of the rock sample 34;
the acoustic emission probe 66 is connected with an acoustic emission testing system 68 through an acoustic emission signal wire 67;
a plurality of acoustic emission probes 66 (shown in fig. 9 and 10); the test method realizes acoustic emission-temperature-seepage-mechanics-chemistry (THMC) multi-field coupling test and axial and horizontal power loading test, can simultaneously perform high-temperature and high-pressure shear seepage test, ultrasonic test, acoustic emission test and rheological test, and realizes the whole process test of forming, expanding and communicating the internal microcracks of the rock in the THMC multi-field coupling test process.
Examples
Use now the utility model discloses it is right for the embodiment to be applied to the test of certain rock the utility model discloses carry out the detailed description, right the utility model discloses be applied to the test of other rocks and have the guide effect equally.
Example 1: conventional triaxial compression test
In this embodiment, a rock sample is subjected to a conventional triaxial compression test, and the specific test operation steps are as follows:
step 1: lifting the confining pressure chamber 5, placing the round rock sample 34 on the sample base cushion block 29, sleeving the sample outside with a sample heat-shrinkable sleeve 39, placing the sample upper end cushion block 31 on the upper part, installing a sample upper end fastening ring 40 and a sample lower end fastening ring 41 on the upper end and the lower end of the sample heat-shrinkable sleeve 39, and then placing the whole on the confining pressure chamber base 28;
step 2: a left displacement sensor 43, a right displacement sensor 44 and an axial displacement sensor 45 are arranged to form a displacement measurement system;
and step 3: sleeving the confining pressure chamber 5 outside a confining pressure chamber base 28, covering an upper end cover plate 14 of the confining pressure chamber, placing an axial static force loading oil cylinder 12, and installing a confining pressure chamber fastening bolt 7;
and 4, step 4: opening the confining pressure chamber exhaust hole 6, filling oil through the confining pressure chamber oil filling hole 35, closing the confining pressure chamber exhaust hole 6 after exhausting air in the confining pressure chamber, and continuing filling oil through the confining pressure chamber oil filling hole 35 to perform confining pressure loading;
and 5: hydraulic oil is injected through the oil filling hole 11 of the axial static loading oil cylinder, so that the axial loading rod 8 moves downwards, and the axial static loading pressure sensor 15 acts on the cushion block 32 at the upper end of the test sample to realize axial static loading;
step 6: and (3) measuring the stress and the displacement by combining the stress measuring system and the displacement measuring system, recording test data, and completing a conventional triaxial compression test (shown in figure 1). The pressure maintaining time is more than 30 days (the specific test time can be freely set according to the requirement), and the conventional triaxial rheological test is completed.
Example 2: true triaxial compression test
In this embodiment, the rock sample is subjected to a true triaxial compression test, and the specific test operation steps are as follows:
step 1: lifting the confining pressure chamber 5, placing a square rock sample 34 on a sample base cushion block 29, respectively placing a sample left side cushion block 30 and a sample right side cushion block 33 on the left side and the right side of the square rock sample 34, placing a confining pressure chamber left side steel cushion block 4 on the left side of the sample left side cushion block 30, simultaneously placing a left side spring 26 at the bottom, placing a lower end spring 25 below the sample right side cushion block 33, and placing a confining pressure chamber right side steel cushion block 32 on the right side of the sample right side cushion block 33;
step 2: a left displacement sensor 43, a right displacement sensor 44 and an axial displacement sensor 45 are arranged to form a displacement measurement system;
and step 3: sleeving the confining pressure chamber 5 outside a confining pressure chamber base 28, covering an upper end cover plate 14 of the confining pressure chamber, placing an axial static force loading oil cylinder 12, and installing a confining pressure chamber fastening bolt 7;
and 4, step 4: the horizontal static loading oil cylinder 21 is arranged on the right side of the confining pressure chamber 5 through a horizontal static loading oil cylinder fastening bolt 22;
and 5: opening the confining pressure chamber exhaust hole 6, filling oil through the confining pressure chamber oil filling hole 35, closing the confining pressure chamber exhaust hole 6 after exhausting air in the confining pressure chamber, and continuing filling oil through the confining pressure chamber oil filling hole 35 to perform confining pressure loading;
step 6: hydraulic oil is injected through the oil filling hole 11 of the axial static loading oil cylinder, so that the axial loading rod 8 moves downwards, and the axial static loading pressure sensor acts on the cushion block 32 at the upper end of the test sample to realize axial static loading;
and 7: hydraulic oil is injected through the oil filling hole 20 of the horizontal loading oil cylinder, so that the horizontal loading rod 19 moves towards the right side, and the horizontal dynamic loading pressure sensor 18 acts on the cushion block 33 on the right side of the test sample to realize transverse static loading;
and 8: and measuring the stress and the displacement by combining the stress measurement system and the displacement measurement system, recording test data, and completing the true triaxial compression test. The dwell time is more than 30 days (the specific test time can be freely set according to the requirement), and the true triaxial rheological test (shown in figure 1) is completed.
Example 3: true normal triaxial dynamic impact test
In this embodiment, the true/normal triaxial dynamic impact test is performed on a rock sample, and the specific test operation steps are as follows:
step 1: the conventional triaxial dynamic impact test sample installation step refers to steps 1-3 in example 1;
step 2: an axial dynamic loading device 9 acts on an axial loading rod 8 through an axial dynamic loading pressure sensor 10, the dynamic loading force is 0-500 kN, the frequency is 0-10 Hz, the amplitude is 0.5mm, and the conventional triaxial dynamic impact test is realized;
and step 3: the procedure for mounting a true triaxial dynamic impact test specimen refers to the procedures 1 to 5 of example 2;
and 4, step 4: an axial dynamic loading device 9 acts on an axial loading rod 8 through an axial dynamic loading pressure sensor 10, the dynamic loading force is 0-500 kN, the frequency is 0-10 Hz, the amplitude is 0.5mm, and the true triaxial axial dynamic impact test is realized;
and 5: the horizontal power loading device 17 acts on the horizontal loading rod 19 through the horizontal power loading pressure sensor 18, the dynamic loading force is 0-500 kN, the frequency is 0-10 Hz, and the amplitude is 0.5mm, so that a true triaxial horizontal power impact test is realized;
step 6: according to the test requirements, a true triaxial axial dynamic impact test, a true triaxial horizontal dynamic impact test or a true triaxial axial and horizontal dynamic impact test (as shown in fig. 1) are selected.
Example 4: true normal triaxial shear seepage coupling test
In this embodiment, a true/normal triaxial shear seepage coupling test is performed on a rock sample, and the specific test operation steps are as follows:
step 1: the installation steps of the conventional triaxial shear seepage coupling test sample refer to steps 1-3 in example 1, wherein the upper and lower ends of a rock sample 34 are provided with an upper semicircular rubber pad 37 and a lower semicircular rubber pad 38, and the rock sample is connected with a seepage control system 63 or a nitrogen gas bottle 59 through a lower end liquid (gas) seepage pipeline 24 and an upper end liquid (gas) seepage pipeline 27;
step 2: when a gas permeation test is carried out, a gas cylinder switch valve 58 and a gas cylinder opening stop valve 57 are opened, a gas pressure gauge 54 and a gas flow gauge 55 are observed, numerical values of the gas pressure gauge 54 and the gas flow gauge 55 are recorded, the gas inlet stop valve 56 is adjusted to a test target pressure, the gas outlet stop valve 53 is adjusted to observe the gas pressure gauge 54 and the gas flow gauge 55 at an air outlet until the target pressure required by the test, the axial pressure and confining pressure loading process are consistent with the conventional compression test in the embodiment 1, test data of stress, displacement and seepage in the loading process are recorded, and the conventional triaxial shear gas permeation coupling test is completed;
and step 3: when a liquid seepage test is carried out, an upstream liquid stop valve 62 and a downstream liquid stop valve 65 are opened, the seepage pressure and the flow rate are adjusted through a seepage control system 63, numerical values are displayed on a liquid pressure gauge 60 and a liquid flow meter 61, the drained liquid is collected through a liquid collecting container 54, the liquid can be water or other chemical solutions (such as hydrochloric acid solution, sulfuric acid solution, sodium chloride and other salt solutions), the axial pressure and confining pressure loading process is consistent with the conventional compression test in the embodiment 1, the test data of stress, displacement and seepage in the loading process are recorded, and the conventional triaxial shear liquid seepage or chemical corrosion multi-field coupling test is realized; wherein, the chemical corrosion is realized by liquid penetration, and the penetrated liquid is selected from water, acid, alkali and salt solution according to the experimental requirement;
and 4, step 4: the true triaxial shear seepage coupling test, gas permeation and liquid seepage are consistent with steps 2 and 3, and the loading system and the measuring device complete the true triaxial shear gas permeation, liquid seepage or chemical corrosion multi-field coupling test (as shown in fig. 1, 3, 4, 7 and 8) according to example 2.
Example 5: dynamic and static true-normal triaxial multi-field coupling test at different temperatures
In this embodiment, a dynamic and static true/normal triaxial multi-field coupling test is performed on a rock sample at different temperatures, and the specific test operation steps are as follows:
step 1: the conventional triaxial dynamic impact test sample installation step refers to steps 1-3 in example 1;
the procedure for mounting a true triaxial dynamic impact test specimen refers to the procedures 1 to 5 of example 2;
step 2: arranging a heating jacket 42 outside the confining pressure chamber 5, connecting a temperature controller 47 through a lead, turning on the temperature controller 47 through a temperature controller power switch 49, setting a temperature rise through a rise temperature setting button 50 and a temperature fall through a fall temperature setting button 48, displaying the set temperature on a set temperature display screen 51, acquiring an actual temperature through a temperature sensor, and displaying the actual temperature on an actual temperature display screen 52;
and step 3: referring to the embodiments 1, 2 and 3, the dynamic and static true triaxial multi-field coupling test at different temperatures is realized (as shown in fig. 1, 2, 3 and 4).
Example 6: acoustic emission test in dynamic and static true-normal triaxial shear rheological THMC multi-field coupling test process
In this embodiment, the acoustic emission test in the dynamic and static true/normal triaxial shear rheology THMC multi-field coupling test process is performed on a rock sample, and the specific test operation steps are as follows:
step 1: arranging 8 acoustic emission probes 66 on two sides of the rock sample 34 respectively, and connecting the acoustic emission probes with an acoustic emission testing system 68 through acoustic emission signal wires 67; controlling the acoustic emission process and acquiring acoustic emission test data via the acoustic emission test system 68;
step 2: referring to examples 1, 2, 3, 4 and 5, completing acoustic emission tests in the dynamic-static true triaxial shear rheology THMC multi-field coupling test process (as shown in figures 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10).
Example 7: ultrasonic testing in dynamic and static true-normal triaxial shear rheological THMC multi-field coupling test process
In this embodiment, the ultrasonic testing in the dynamic and static true/normal triaxial shear rheology THMC multi-field coupling test process is performed on the rock sample, and the specific test operation steps are as follows:
step 1: arranging an ultrasonic emission probe 70 in an ultrasonic emission probe pressure-bearing protection pressure head 71 through an ultrasonic emission probe pressure spring 72, and connecting the ultrasonic emission probe with an ultrasonic testing system 69 through a lead 76;
step 2: an ultrasonic receiving probe 73 is arranged inside an ultrasonic receiving probe pressure-bearing protection pressure head 74 through an ultrasonic receiving probe pressing spring 75 and is connected with an ultrasonic testing system 69 through a lead 76; controlling the ultrasonic testing process and obtaining ultrasonic testing data by the ultrasonic testing system 69;
and step 3: referring to examples 1, 2, 3, 4 and 5, ultrasonic testing in the dynamic-static true triaxial shear rheology THMC multi-field coupling test process is completed (as shown in figures 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11).
The test device of the utility model can carry out multi-field coupling tests such as a conventional triaxial compression test, a true triaxial compression dynamic impact test, a true triaxial compression shear test, a gas permeation test, a liquid seepage test, a chemical corrosion test, a temperature test, an ultrasonic wave and acoustic emission test and the like; the utility model relates to a multi-functional many field coupling test device, the utility model discloses can accomplish any in embodiment 1 ~ 7 alone, also can accomplish the multiunit of arbitrary combination in embodiment 1 ~ 7 experimental. The utility model discloses can realize that the rock moves many field coupling test such as load, static load, shearing, rheology, temperature, seepage flow, chemistry, perfect the function of current rock mechanics test technique, satisfy the mechanical test of engineering geological conditions complicated day by day, improve efficiency of software testing and precision.
In order to illustrate more clearly the utility model discloses a many field coupling test device of rock sound true/normal triaxial shear flow THMC compares the advantage that has with prior art, the staff has compared these two kinds of technical scheme, its contrast result is as follows:
according to the upper table, the real/normal triaxial shear flow change THMC multi-field coupling test device of rock sound compare with prior art, the utility model discloses can carry out conventional triaxial compression test and/or true triaxial compression dynamic impact test and/or true triaxial compression shear test and/or gas permeation test and/or liquid seepage flow test and/or chemical corrosion test and/or temperature test and/or ultrasonic wave and acoustic emission test and other multi-field coupling tests.
Other parts not described belong to the prior art.
Claims (5)
1. The rock dynamic and static true/normal triaxial shear rheological THMC multi-field coupling test device is characterized in that: the device comprises a static loading main structure (R), a static loading system (A), a dynamic loading system (B), a seepage measurement system (E), a temperature test system (F), an ultrasonic test system (Q) and an acoustic emission test system (S);
the static force loading system (A), the dynamic force loading system (B), the seepage measurement system (E), the temperature test system (F), the ultrasonic test system (Q) and the acoustic emission test system (S) are all arranged on the static force loading main structure (R).
2. The rock dynamic-static true/normal-triaxial shear rheological THMC multi-field coupling test device according to claim 1, characterized in that: the static loading main structure (R) comprises a confining pressure chamber (5), a confining pressure chamber base (28), a confining pressure chamber upper end cover plate (14), an axial static loading oil cylinder (12) and a horizontal static loading oil cylinder (21);
the upper end of the confining pressure chamber (5) is provided with a confining pressure chamber upper end cover plate (14), and the lower end is provided with a confining pressure chamber base (28); the axial static force loading oil cylinder (12) is arranged above the confining pressure chamber (5); the horizontal static force loading oil cylinder (21) is arranged on the side wall of the confining pressure chamber (5).
3. The rock dynamic-static true/normal-triaxial shear rheological THMC multi-field coupling test device according to claim 2, characterized in that: one end of the seepage measurement system (E) extends into the confining pressure chamber (5) and is connected with the lower end of the rock sample (34), and the other end of the seepage measurement system (E) extends into the confining pressure chamber (5) and is connected with the upper end of the rock sample (34);
the temperature testing system (F) is sleeved on the periphery of the confining pressure chamber (5);
the ultrasonic testing system (Q) is connected to the upper end and the lower end of the rock sample (34);
the acoustic emission testing system (S) is connected to the side wall of the rock sample (34).
4. The rock dynamic-static true/normal-triaxial shear rheological THMC multi-field coupling test device according to claim 3, characterized in that: the static loading system (A) comprises an axial loading rod (8), an axial static loading oil cylinder oil filling hole (11), an axial static loading oil cylinder (12), an axial static unloading oil cylinder oil filling hole (13), an axial static loading pressure sensor (15), a horizontal static loading pressure sensor (16), a horizontal loading rod (19), a horizontal loading oil cylinder oil filling hole (20), a horizontal static loading oil cylinder (21) and a horizontal static unloading oil filling hole (23);
the axial loading rod (8) is connected with the axial static loading oil cylinder (12) in a sliding manner;
the horizontal loading rod (19) is connected with a horizontal static loading oil cylinder (21) in a sliding mode.
5. The rock dynamic-static true/normal-triaxial shear rheological THMC multi-field coupling test device according to claim 4, characterized in that: and the dynamic loading system (B) is positioned at the periphery of the static loading main body structure (R) and is connected with the static loading system (A).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790973A (en) * | 2021-09-16 | 2021-12-14 | 中国十七冶集团有限公司 | Intelligent inspection equipment for researching concrete corrosion mechanism under seepage and inspection method thereof |
| WO2024041145A1 (en) * | 2022-08-25 | 2024-02-29 | 安徽理工大学 | Large-size true triaxial coal-rock mass multi-field seepage coupling system experimental device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113790973A (en) * | 2021-09-16 | 2021-12-14 | 中国十七冶集团有限公司 | Intelligent inspection equipment for researching concrete corrosion mechanism under seepage and inspection method thereof |
| WO2024041145A1 (en) * | 2022-08-25 | 2024-02-29 | 安徽理工大学 | Large-size true triaxial coal-rock mass multi-field seepage coupling system experimental device and method |
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