CN110132746B - Indoor experimental simulation device and method for performing geological fault mechanical behaviors by triaxial tester - Google Patents
Indoor experimental simulation device and method for performing geological fault mechanical behaviors by triaxial tester Download PDFInfo
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- CN110132746B CN110132746B CN201910533635.0A CN201910533635A CN110132746B CN 110132746 B CN110132746 B CN 110132746B CN 201910533635 A CN201910533635 A CN 201910533635A CN 110132746 B CN110132746 B CN 110132746B
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- 230000006399 behavior Effects 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004088 simulation Methods 0.000 title claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000002474 experimental method Methods 0.000 claims abstract description 15
- 239000011435 rock Substances 0.000 claims description 36
- 238000007789 sealing Methods 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 9
- 239000007788 liquid Substances 0.000 claims description 6
- 230000005855 radiation Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 239000012634 fragment Substances 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000004576 sand Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 239000004927 clay Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 238000005253 cladding Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000004058 oil shale Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
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- 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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
- G01N2001/2873—Cutting or cleaving
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention belongs to the technical field of geotechnical engineering, and particularly relates to an indoor experimental simulation device and method for performing geological fault mechanical behaviors by a triaxial tester. According to the indoor experimental simulation device for the triaxial tester for performing geological fault mechanical behaviors, water can be introduced to the surface of a sample by arranging the guide grooves on the connecting pressing plate, when the triaxial tester applies pressure in three directions, the sample can generate different stresses in the three directions, and the stress state of the sample can be changed by adjusting the pressure in each direction. During the experiment, the pressure of water applied to the surface of the sample in the guide groove can be adjusted so as to simulate the natural state. According to the experimental method, three groups of pressure heads of the triaxial tester realize a three-way unequal stress environment, and the seepage field under the real condition is simulated through the guide grooves on the connecting pressure plate, so that the indoor experimental simulation of the stress-seepage environment where the real fault is located can be realized.
Description
Technical Field
The invention belongs to the technical field of geotechnical engineering, and particularly relates to an indoor experimental simulation device and method for performing geological fault mechanical behaviors by a triaxial tester.
Background
For underground rock engineering such as mineral resource exploitation, oil shale gas exploitation and the like, the problems of joint crack development, rock mass weathering, underground water development and the like are accompanied near a fracture surface due to the influence of fault structure movement. The rock mass in the underground can be broken and destroyed under the action of structural stress in the horizontal direction, the rock mass on two sides has obvious dislocation along the fracture surface, the fracture surface is commonly called a rock mass fault structure, the vicinity of the fracture surface is often accompanied by the influence of joint crack development and groundwater seepage, and the stress environment of the fault is in a three-way unequal stress state. At present, no effective method is available for experiments on faults with different fractal dimensions.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides an indoor experimental simulation device and method for performing geological fault mechanical behaviors by a triaxial tester.
In order to achieve the above object, the present invention adopts the following solutions: an indoor experimental simulation device for performing geological fault mechanical behaviors by a triaxial tester comprises a support frame, wherein three groups of oil cylinders are arranged on the support frame, the axes of the oil cylinders are orthogonally arranged, a left oil cylinder and a right oil cylinder are coaxial, a cylinder rod is close to the center of the support frame, an upper oil cylinder and a lower oil cylinder are coaxial, the cylinder rod is close to the center of the support frame, and a front oil cylinder and a rear oil cylinder are coaxial, and the cylinder rod is close to the center of the support frame;
The end part of the cylinder rod of the left cylinder is vertically provided with a left pressing block, the end part of the cylinder rod of the right cylinder is vertically provided with a right pressing block,
The cylinder rod end of the upper cylinder is vertically provided with an upper pressing block, the cylinder rod end of the lower cylinder is vertically provided with a lower pressing block, the cylinder rod end of the front cylinder is vertically provided with a front pressing block, and the cylinder rod end of the rear cylinder is vertically provided with a rear pressing block.
Further, all the pressing blocks are provided with inner taper holes close to the central surface of the supporting frame, one end of each water through hole is communicated with the inner taper holes, the other end of each water through hole extends to the surface of each pressing block, and connecting threads are arranged at the end parts, close to the surface of each pressing block, of each water through hole.
Further, still set up the connection clamp plate, the connection clamp plate surface set up the tapering with the outer cone boss that interior taper hole tapering is the same, outer cone boss axle center sets up the center water hole that runs through the connection clamp plate, sets up the seal groove on the outer cone boss conical surface, set up the sealing washer in the seal groove, connection clamp plate and outer cone boss opposite surface set up the radial guide groove of being connected with the center water hole.
Further, still include pyrocondensation pipe and locking ring, connect clamp plate and sample end surface laminating, set up outer cone boss surface and keep away from the sample, sample side surface sets up the pyrocondensation pipe, and the whole cladding sample of pyrocondensation pipe and connection clamp plate side, pyrocondensation pipe surface corresponds the position with the connection clamp plate and sets up the locking ring.
Further, the connecting pressing plate is provided with two pieces which are respectively arranged on the opposite surfaces of the test sample, and the surfaces of the heat shrinkage tubes outside the two connecting pressing plates are respectively provided with the locking rings.
Further, the surface of the connecting pressing plate, on which the radiation guide groove is provided, is also provided with an annular guide groove, which intersects with the radiation guide groove.
Further, the sealing ring is an O-shaped ring.
Further, the oil cylinder is a plunger type oil cylinder.
The invention also provides an indoor experimental simulation method for the geofault mechanical behavior of the triaxial tester, which comprises the following steps:
s1, selecting a fault rock mass and a fault fracture zone rock mass to be simulated, and selecting rock mass samples from the surrounding of a fault and the fracture zone;
S2, cutting a rock sample around a fault to form a sample blank, wherein the sample blank is cube-shaped and is cut into sample cracks;
S3, crushing selected rock blocks in the crushing belt, adding the crushed rock fragments into a cementing material, and filling the cementing material into sample cracks of a sample blank to form a sample;
s4, covering a connecting pressing plate with a guide groove on the surface, wherein the guide groove can enable liquid to pass through the connecting pressing plate, and enabling the liquid in the guide groove to be in contact with the surface of the sample;
s5, sleeving a heat shrinkage tube on the side surface of the sample, heating to shrink the heat shrinkage tube, and integrally coating the side surface of the sample and the connecting pressing plate after shrink of the heat shrinkage tube;
s6, mounting a locking ring on the surface of the heat-shrinkable tube to enable the heat-shrinkable tube to cling to the side surface of the connecting pressing plate to form secondary sealing;
s7, mounting the sample on a triaxial tester, and loading three groups of orthogonal positive pressures;
and S8, adding water into the guide groove of the connecting pressing plate, and adjusting the pressure of the triaxial tester to perform experiments.
Further, the granularity of the crushed rock blocks in the step S3 is as follows: 125 μm to 16mm.
The cementing material is clay and cement.
According to the indoor experimental simulation device for the triaxial tester for performing geological fault mechanical behaviors, water can be introduced to the surface of a sample by arranging the guide grooves on the connecting pressing plate, when the triaxial tester applies pressure in three directions, the sample can generate different stresses in the three directions, and the stress state of the sample can be changed by adjusting the pressure in each direction. During the experiment, the pressure of water applied to the surface of the sample in the guide groove can be adjusted so as to simulate the natural state.
The invention relates to an indoor experimental simulation method for a geomechanical fault behavior by an axis tester. The rock mass samples are selected from the surrounding of the fault and the fracture zone by selecting the fault rock mass and the fault fracture zone rock mass to be simulated, so that the tested result is largely approximate to the natural state. The sample is cut to form a sample crack, and meanwhile, the sample crack is filled after the rock selected in the breaking belt is broken and the cementing material is added, so that the natural state is simulated more truly. The rock mass environment in a natural state can be simulated by coating the side surface of the sample and then enabling the end surface to be in contact with water and finally loading the stress in three directions on the sample for testing.
Three groups of pressure heads of the triaxial tester realize three-way unequal stress environments, and the seepage field under the real condition is simulated through the guide grooves on the connecting pressure plate, so that the indoor test simulation of the stress-seepage environment where the real fault is located can be realized.
The method for simulating the axial tester to perform the indoor experiment of the geomechanical behavior of the fault can simulate the three-way unequal stress state of the fault-containing groundwater rock mass, and provides a new thought for the indoor research method of the fault-containing groundwater rock mass.
Drawings
FIG. 1 is a schematic diagram of the present invention.
Fig. 2 is a top view of fig. 1.
Figure 3 is a section A-A of figure 1.
Fig. 4 is a schematic diagram of a compact.
Fig. 5 is a section B-B of fig. 4.
FIG. 6 is a schematic view of a connecting platen.
FIG. 7 is section C-C of FIG. 6
FIG. 8 is a schematic diagram of the cooperation of the press block and the connecting press plate.
FIG. 9 is a schematic diagram of the combination of a sample and a connecting platen.
The marks in the figure:
11-left cylinder, 12-right cylinder, 21-lower cylinder, 22-upper cylinder, 31-front cylinder, 32-rear cylinder, 2201-upper cylinder, 2202-upper cylinder rod, 2203-upper press block, 3103-front press block, 2103-lower press block, 3203-rear press block, 4, support frame, 5-connecting press plate, 51-central water passing hole, 52-radial guide groove, 53-first annular groove, 54-second annular groove, 55-outer cone boss, 56-seal groove, 67-seal ring, 6-inner cone hole, 7-water passing hole, 8-connecting screw thread, 9-locking ring, 10-sample and 11-heat shrinkage pipe.
Detailed Description
Referring to fig. 1 to 9, the invention relates to an indoor experimental simulation device and method for performing geological fault mechanical behaviors by a triaxial tester.
In order to achieve the above object, the present invention adopts the following solutions: the utility model provides an indoor experimental simulation device that triaxial tester carries out geomechanical behavior, includes support frame 4, sets up three groups of hydro-cylinders and hydro-cylinder axis quadrature setting on the support frame 4, left hydro-cylinder 11 and right hydro-cylinder 12 are coaxial and the jar pole is close to support frame 4 center, and upper hydro-cylinder 22 and lower hydro-cylinder 21 are coaxial and the jar pole is close to support frame 4 center, and front hydro-cylinder 31 and back hydro-cylinder 32 are coaxial and the jar pole is close to support frame 4 center;
The end part of the cylinder rod of the left cylinder 11 is vertically provided with a left pressing block, the end part of the cylinder rod of the right cylinder 12 is vertically provided with a right pressing block,
The cylinder end of the upper cylinder 22 is vertically provided with an upper press block 2203, the cylinder end of the lower cylinder 21 is vertically provided with a lower press block 2103, the cylinder end of the front cylinder 31 is vertically provided with a front press block 3103, and the cylinder end of the rear cylinder 32 is vertically provided with a rear press block 3203.
Further, all the pressing blocks are provided with inner taper holes 6 close to the central surface of the supporting frame 4, one end of each water through hole 7 is communicated with the inner taper holes 6, the other end of each water through hole extends to the surface of each pressing block, and connecting threads 8 are arranged at the end part, close to the surface of each pressing block, of each water through hole 7.
Further, a connecting pressing plate 5 is further arranged, an outer cone boss 55 with the taper identical to that of the inner cone hole 6 is arranged on the surface of the connecting pressing plate 5, a central water passing hole 51 penetrating through the connecting pressing plate 5 is arranged at the axis of the outer cone boss 55, a sealing groove 56 is arranged on the conical surface of the outer cone boss 55, a sealing ring 67 is arranged in the sealing groove 56, and a radial guide groove 52 connected with the central water passing hole 51 is arranged on the opposite surface of the connecting pressing plate 5 and the outer cone boss 55.
Through setting up interior taper hole 6 on the briquetting, again with connecting clamp plate 5 cooperation, can introduce sample 10 surface to water, also can introduce the water of taking certain pressure, can change experimental conditions like this.
Further, still include pyrocondensation pipe 11 and locking ring 9, connect clamp plate 5 and sample 10 end surface laminating, set up outer cone boss 55 surface and keep away from sample 10, sample 10 side surface sets up pyrocondensation pipe 11, and pyrocondensation pipe 11 whole cladding sample 10 and connect clamp plate 5 side, and pyrocondensation pipe 11 surface and connect clamp plate 5 corresponding position and set up locking ring 9.
In order to prevent water from overflowing during the test of the sample 10, the side surface of the sample 10 is further covered with a heat shrink tube 11, and a locking ring 9 is added at the contact position with the connecting pressing plate 5, so that the sealing effect can be further improved.
Further, the two connecting pressing plates 5 are respectively arranged on the opposite surfaces of the test sample 10, and the locking rings 9 are respectively arranged on the surfaces of the heat shrinkage tubes 11 outside the two connecting pressing plates 5.
The connecting platen 5 may be provided separately to one surface of the specimen 10 or may be provided to two opposite surfaces of the specimen 10. In the actual experiment, the connecting pressure plate 5 may be positioned on the upper and lower surfaces, and if necessary, the connecting pressure plate 5 may be positioned on the left and right or front and rear surfaces.
Further, the surface of the connecting platen 5 where the radiation guide 52 is provided is also provided with an annular guide which intersects the radiation guide.
The addition of the annular guide grooves can increase the contact area between water and the sample 10, and one or more annular guide grooves can be arranged according to the requirement.
Further, the sealing ring 67 is an O-ring.
Further, the oil cylinder is a plunger type oil cylinder.
As shown in fig. 3, the upper cylinder is composed of an upper cylinder tube 2201 and an upper cylinder rod 2202.
The invention also provides an indoor experimental simulation method for the geofault mechanical behavior of the triaxial tester, which comprises the following steps:
s1, selecting a fault rock mass and a fault fracture zone rock mass to be simulated, and selecting a rock mass sample 10 from the surrounding of a fault and the fracture zone;
s2, cutting a rock sample 10 acquired around a fault to form a sample 10 blank, wherein the sample 10 blank is cube-shaped, and a sample 10 crack is cut;
When cutting is carried out, if the roughness of the surface of the fault is required, cutting tools such as a steel wire cutter, a water cutter, a laser cutter and the like can be selected for cutting to obtain simulated fault fracture surfaces with different roughness; if the simulated fault fracture surfaces with different roughness degrees are required to be obtained randomly, the complete rock block can be pressed and sheared into the simulated fracture surfaces with random roughness degrees through a pressing and shearing machine.
S3, crushing selected rock blocks in the crushing belt, adding cementing materials into crushed rock fragments, and filling the crushed rock fragments into sample 10 cracks of a sample 10 blank to form a sample 10;
The packing thickness can be calculated according to the ratio of the simulated fault size to the actual fault size, and when the sample 10 blank is manufactured, the proper crack width of the sample 10 needs to be manufactured according to the requirement. The simulated fault specimens 10 of different fractal dimensions can be produced by different cutting patterns and different filling materials.
S4, covering a connecting pressing plate 5 with a guide groove on the surface for allowing liquid to pass through on the surface of the sample 10, and enabling the liquid in the guide groove to contact with the surface of the sample 10;
s5, sleeving the heat shrinkage tube 11 on the side surface of the sample 10, heating to shrink the heat shrinkage tube 11, and integrally coating the side surfaces of the sample 10 and the connecting pressing plate 5 after shrink of the heat shrinkage tube 11;
The whole seepage system is in a sealed state by adding a heat shrinkage pipe 11 on the side surface.
S6, mounting a locking ring 9 on the surface of the heat-shrinkable tube 11 to enable the heat-shrinkable tube 11 to be tightly attached to the side surface of the connecting pressing plate 5 to form secondary sealing;
referring to fig. 8, after the connecting pressing plate 5 contacts with the pressing block, the outer cone boss 55 on the connecting pressing plate 5 is matched with the inner cone hole 6 on the pressing block, and meanwhile, the sealing function of the O-shaped sealing ring 67 is achieved. Water in the water through holes 7 in the pressing block can enter the surface of the connecting pressing plate 5 and cannot leak out. The thread at the end part of the water through hole 7 is convenient to be connected with a water source.
S7, mounting the sample 10 on a triaxial tester, and loading three groups of orthogonal positive pressures;
and S8, adding water into the guide groove of the connecting pressing plate 5, and adjusting the pressure of the triaxial tester to perform experiments.
Further, the granularity of the crushed rock blocks in the step S3 is as follows: 125 μm to 16mm.
During experiments, the crushed granularity can be selected from 8-16 mm as medium gravel, 4-8 mm as fine gravel, 2-4 mm as superfine gravel, 1-2 mm as very coarse sand, 1/2-1 mm as coarse sand and 1/4-1/2 mm as medium sand 125-250 mu m fine sand 62.5-125 mu m fine sand.
The granularity of the crushed rock blocks can be determined according to faults to be simulated as required, and the ratio of the actual fault width to the sample fault width can be taken to be 0.0002.
The cementing material is clay and cement. Generally, the weight ratio of clay to cement can be 1:0.1-100.
Claims (6)
1. An indoor experimental simulation method for performing geological fault mechanical behaviors by a triaxial tester, wherein:
The indoor experimental simulation device for the geological fault mechanical behavior of the triaxial tester comprises a support frame, wherein three groups of oil cylinders are arranged on the support frame, the axes of the oil cylinders are orthogonally arranged, a left oil cylinder and a right oil cylinder are coaxial, a cylinder rod is close to the center of the support frame, an upper oil cylinder and a lower oil cylinder are coaxial, the cylinder rod is close to the center of the support frame, and a front oil cylinder and a rear oil cylinder are coaxial, and the cylinder rod is close to the center of the support frame;
The end part of the cylinder rod of the left cylinder is vertically provided with a left pressing block, the end part of the cylinder rod of the right cylinder is vertically provided with a right pressing block,
An upper pressing block is vertically arranged at the end part of a cylinder rod of the upper cylinder, a lower pressing block is vertically arranged at the end part of a cylinder rod of the lower cylinder, a front pressing block is vertically arranged at the end part of a cylinder rod of the front cylinder, and a rear pressing block is vertically arranged at the end part of a cylinder rod of the rear cylinder;
the inner conical holes are formed in the positions, close to the center surface of the supporting frame, of all the pressing blocks, one end of each water through hole is communicated with each inner conical hole, the other end of each water through hole extends to the surface of each pressing block, and connecting threads are formed in the positions, close to the end parts of the surfaces of the pressing blocks, of the water through holes;
The connecting pressing plate is further arranged, an outer cone boss with the taper identical to that of the inner cone hole is arranged on the surface of the connecting pressing plate, a central water passing hole penetrating through the connecting pressing plate is arranged on the axis of the outer cone boss, a sealing groove is arranged on the conical surface of the outer cone boss, a sealing ring is arranged in the sealing groove, and a radial guide groove connected with the central water passing hole is arranged on the surface of the connecting pressing plate;
the connecting pressing plate is attached to the end surface of the sample, the outer cone boss surface is arranged to be far away from the sample, the heat shrinkage pipe is arranged on the side surface of the sample, the heat shrinkage pipe integrally covers the side surfaces of the sample and the connecting pressing plate, and the locking ring is arranged at the position, corresponding to the connecting pressing plate, of the surface of the heat shrinkage pipe;
the indoor experimental simulation method for the geomechanical fault behavior by the triaxial tester is characterized by comprising the following steps of: the method comprises the following steps:
s1, selecting a fault rock mass and a fault fracture zone rock mass to be simulated, and selecting rock mass samples from the surrounding of a fault and the fracture zone;
S2, cutting a rock sample around a fault to form a sample blank, wherein the sample blank is cube-shaped and is cut into sample cracks;
S3, crushing selected rock blocks in the crushing belt, adding the crushed rock fragments into a cementing material, and filling the cementing material into sample cracks of a sample blank to form a sample;
s4, covering a connecting pressing plate with a guide groove on the surface, wherein the guide groove can enable liquid to pass through the connecting pressing plate, and enabling the liquid in the guide groove to be in contact with the surface of the sample;
s5, sleeving a heat shrinkage tube on the side surface of the sample, heating to shrink the heat shrinkage tube, and integrally coating the side surface of the sample and the connecting pressing plate after shrink of the heat shrinkage tube;
s6, mounting a locking ring on the surface of the heat-shrinkable tube to enable the heat-shrinkable tube to cling to the side surface of the connecting pressing plate to form secondary sealing;
s7, mounting the sample on a triaxial tester, and loading three groups of orthogonal positive pressures;
and S8, adding water into the guide groove of the connecting pressing plate, and adjusting the pressure of the triaxial tester to perform experiments.
2. The method for simulating the indoor experiment of the geomechanical fault behaviors of the triaxial tester according to claim 1, wherein the connecting pressing plate is provided with two pieces, the two pieces are respectively arranged on the opposite surfaces of the test sample, and the surfaces of the heat shrinkage tubes outside the two pieces of connecting pressing plate are respectively provided with the locking rings.
3. The method for simulating the mechanical behavior of a geological fault in an indoor experiment by using a triaxial tester according to claim 1, wherein the surface of the connecting pressing plate, on which the radiation guide groove is arranged, is further provided with an annular guide groove, and the annular guide groove is intersected with the radiation guide.
4. The method for simulating the mechanical behavior of a geological fault in an indoor experiment by using a triaxial tester according to claim 3, wherein the sealing ring is an O-ring.
5. The method for simulating the mechanical behavior of a geological fault in an indoor experiment by using a triaxial tester according to claim 4, wherein the oil cylinder is a plunger type oil cylinder.
6. The method for simulating the indoor experiment of the geomechanical behavior of the triaxial tester according to claim 1, wherein the granularity of the crushed rock in the step S3 is as follows: 125 μm to 16mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910533635.0A CN110132746B (en) | 2019-06-19 | 2019-06-19 | Indoor experimental simulation device and method for performing geological fault mechanical behaviors by triaxial tester |
| PCT/CN2019/092316 WO2020048187A2 (en) | 2019-06-19 | 2019-06-21 | Indoor experiment simulation apparatus and method for triaxial tester to perform geological fault mechanical behaviour |
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| CN201910533635.0A CN110132746B (en) | 2019-06-19 | 2019-06-19 | Indoor experimental simulation device and method for performing geological fault mechanical behaviors by triaxial tester |
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| CN110132746A CN110132746A (en) | 2019-08-16 |
| CN110132746B true CN110132746B (en) | 2024-05-10 |
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| CN111594159B (en) * | 2020-06-12 | 2022-08-26 | 西南石油大学 | Device and method for testing flow line distribution in seepage process |
| CN111596036A (en) * | 2020-06-23 | 2020-08-28 | 煤炭科学技术研究院有限公司 | Experimental simulation device and method for fault activation in coal seam mining |
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| CN110132746A (en) | 2019-08-16 |
| WO2020048187A2 (en) | 2020-03-12 |
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