CN108678761B - A kind of rock microwave fracturing experimental rig based on true triaxial load - Google Patents
A kind of rock microwave fracturing experimental rig based on true triaxial load Download PDFInfo
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- 239000011435 rock Substances 0.000 title claims abstract description 172
- 230000005855 radiation Effects 0.000 claims abstract description 92
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 28
- 238000012216 screening Methods 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims description 70
- 230000005540 biological transmission Effects 0.000 claims description 68
- 230000003044 adaptive effect Effects 0.000 claims description 27
- 239000011148 porous material Substances 0.000 claims description 26
- 230000005284 excitation Effects 0.000 claims description 19
- 239000012780 transparent material Substances 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 10
- 238000010168 coupling process Methods 0.000 claims description 10
- 238000005859 coupling reaction Methods 0.000 claims description 10
- 230000033001 locomotion Effects 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 239000004575 stone Substances 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000002955 isolation Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000010438 granite Substances 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 238000012827 research and development Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/0875—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket
- E21D9/0879—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
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Abstract
A kind of rock microwave fracturing experimental rig based on true triaxial load, including true triaxial charging assembly and microwave radiation fracturing component, microwave radiation fracturing component are equipped with two sets, respectively fracturing component in microwave radiation surface fracturing component and microwave radiation hole altogether；True triaxial charging assembly includes fixed loading frame, mobile loading frame, pedestal, track, slide unit and two-freedom movable stand；It is equipped with two groups of Z-direction actuator and two groups of Y-direction actuator on fixed loading frame, one group of X is equipped on mobile loading frame to actuator；Rock sample LOADED CAVITY is located in the middle part of fixed loading frame；Mobile loading frame and slide unit are arranged by sliding block in orbit；Fracturing component passes through two-freedom movable stand and is mounted on slide unit in microwave radiation surface fracturing component and microwave radiation hole, and slide unit and two-freedom movable stand are driven by servo motor；Micro-wave screening net is equipped on mobile loading frame, it is indoor that experimental rig is integrally placed at electromagnetic shielding.
Description
Technical field
The invention belongs to geotechnical engineering and mining engineering technical fields, more particularly to a kind of rock based on true triaxial load
Stone microwave fracturing experimental rig.
Background technique
Microwave-assisted breaking technique for rock is a kind of emerging breaking technique for rock of great potential, before machinery knives rock cutting, is led to
It crosses microwave and radiates fracturing rock in advance, reduce the mechanical characteristics such as the uniaxial compression, tension and point load strength of rock, solve mechanical
Cutter problem easy to wear when method breaking hard rock, that is, can be improved efficiency of breaking rock, can also reduce broken rock cost.
In constructing tunnel, by shield machine and TBM cutterhead carry out tunneling shield construction in the way of it is more and more extensive, but
Due to the influence of boulder, often there is the situation of serious tool wear, tool apron deformation and replacement difficulty, cutterhead abrasion will lead to knife
Disk strength and stiffness reduce, cutterhead discontinuity will lead to base bearing is impaired or main shaft seals are destroyed, cutterhead blocking and
The drawbacks such as shield load increasing.
For example, No. three line engineerings of Guangzhou Underground encountered granite boulder group in day China section, under normal circumstances in 2004
Several hundred meters of shield machine are just changed a cutter, and in this section, every advance more than ten meters of shield machine just needs to change cutter, some places
Huge boulder block head-on keep off in front of tunnel, pass through shield machine can not at all, which once once stopped work, engineering without
Method promotes, and is known as " global problem " by subway circle.In 2006, No. three line engineerings of Guangzhou Underground were near five mountain of the Milky Way
Under once encounter boulder group, cause a talent to promote 7cm, cause half a year of stopping work, just solved using a variety of blasting techniques afterwards.2009
Year, No. three line engineerings of Guangzhou Underground prolong section in north and encounter boulder group, due to too close apart from inpatient department, Nanfang Hospital building, cannot adopt
Blasting method is taken, hand digging can only be carried out, one day construction volume of script shield machine causes half a year just to be completed.In 2016, extensively
Between the Luogang District Su Yuanzhi, the number for the tool changing that opens a position is as high as more than 200 times No. six line engineerings of state subway.
When excavating hard rock tunnel using TBM cutterhead, it is often subject to the influence of cutterhead serious wear, leads to tool changing quite frequency
Numerous, this greatly improves maintenance cost, has also seriously affected construction speed.
According to incompletely statistics, cutter consumption costs accounts for about the 30%~40% of project cost, and cutter safeguards replacing construction
Also account for about the 30%~40% of project duration.
For example, No. 2 line engineerings of Qingdao region during shield-tunneling construction, meet with high rigidity granite, lead to tool wear
It is larger, 3~5 are just needed replacing daily cutter, and only the cost of charp tool is just in 8000 yuan/meter or so.It helps the engineering Qinling Mountains, Weihe drawing the Chinese
During tunnel shield-tunneling construction, hard quartz-like rock and granite are encountered, in amounting to 2000m driving distance, is amounted in replacement
38, heart knife, 1668, hilted broadsword, hilted broadsword cutter ring 858 is consumed, so that construction cost dramatically increases, and has seriously affected construction
Progress.
Since the design and rock property and geological conditions of TBM cutterhead have close relationship, rock point load intensity, list
Axis compressive strength and tensile strength are the important parameters for influencing cutterhead service life and pile penetration, and the reduction of rock strength then can be one
Determine the service life and the pile penetration that improve cutterhead in degree, the intensity of rock can be significantly reduced just by microwave radiation.
Since many tunnelling works belong to deep rock mass engineering project, by the effect of crustal stress, deep engineering rock mass
Often under the three-dimensional high-stress state, due to the microwave Fracturing effect of rock under different stress be it is different,
So just need to study the microwave fracturing effect of the rock under different stress.
Therefore, fracturing effect of the microwave radiation to rock, research and development when being rotated for more preferable simulation shield machine and TBM cutterhead
A kind of rock microwave fracturing experimental rig and method based on true triaxial load are very necessary.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of rock microwave fracturing test based on true triaxial load
Device is not only able to the rotation status of simulation shield machine and TBM cutterhead, while carrying out table to the rock sample under true triaxial load
Face microwave radiation fracturing can also carry out microwave radiation fracturing in hole to the rock sample under true triaxial load in the stationary state,
And then obtain the microwave Fracturing effect of rock sample under different stress.
To achieve the goals above, the present invention adopts the following technical scheme: a kind of rock microwave based on true triaxial load
Fracturing experimental rig, including true triaxial charging assembly and microwave radiation fracturing component；The true triaxial charging assembly includes fixing
Formula loading frame, mobile loading frame, pedestal, track, slide unit and two-freedom movable stand；The fixed loading frame is adopted
With hollow structure, the central space of fixed loading frame is rock sample LOADED CAVITY；The rock sample LOADED CAVITY just
The first Z-direction actuator, the fixed load immediately below rock sample LOADED CAVITY are provided on the fixed loading frame of top
It is provided with the second Z-direction actuator on frame, is provided with the first Y-direction on the fixed loading frame on the left of rock sample LOADED CAVITY
Actuator is provided with the second Y-direction actuator on the fixed loading frame on the right side of rock sample LOADED CAVITY；The pedestal is divided into
Front end pedestal and rear end pedestal, front end pedestal are located on the ground in front of rock sample LOADED CAVITY, and rear end pedestal is located at rock examination
On the ground at sample LOADED CAVITY rear；The track passes through the rock sample LOADED CAVITY of fixed loading frame, and track and front end
Pedestal, fixed loading frame and rear end pedestal are solidly installed simultaneously；The slide unit is arranged by sliding block to be added in rock sample
It carries on the track in front of chamber, X is installed on the front end pedestal to servo motor, be fixed with X to screw in slide unit lower surface,
X is coated with into screw to lead screw in X, X is parallel to the track to lead screw, motor shaft from the X to servo motor and X to lead screw
End is fixedly connected with；The microwave radiation fracturing component is mounted on slide unit by two-freedom movable stand；The mobile load
Frame is arranged in orbit by sliding block, and mobile loading frame includes front support plate, rear end support plate and horizontally-supported column,
Front support plate is fixedly connected with rear end support plate by horizontally-supported column, and microwave fracturing hole is offered on front support plate, and
The aperture size in microwave fracturing hole is less than the loading surface size of rock sample；X is provided with to actuation in the rear end support plate
Device；The first Z-direction actuator, the second Z-direction actuator, the first Y-direction actuator, the second Y-direction actuator and X are to actuator configurations
It is identical, and it is each equipped with load cell and displacement sensor, for measuring the load value and shift value of actuator.
Radiating surface micro-wave screening net is installed in the front of the front support plate of the mobile loading frame, in front end branch
The back side of fagging is equipped with loading surface micro-wave screening net, is provided with microwave radiation fracturing component on the net in radiating surface micro-wave screening and wears
Hole is filled, is provided with actuator rigid pressure head mounting hole on the net in loading surface micro-wave screening；The rock based on true triaxial load
Stone microwave fracturing experimental rig is electromagnetically shielded interior between being integrally provided in one, console is located at electromagnetic shielding outdoor.
The two-freedom movable stand includes fixing seat, Y-direction lead screw, Y-direction guide rod, Y-direction screw, Y-direction servo motor, movement
Seat, Z-direction lead screw, Z-direction guide rod, Z-direction screw and Z-direction servo motor；The fixing seat is packed in slide unit upper surface, the Y-direction silk
Thick stick and Y-direction guide rod are packed in fixing seat in parallel, and Y-direction lead screw and Y-direction guide rod are horizontally disposed and perpendicular with track；The Y-direction
Servo motor is packed in fixing seat, and the end of the motor shaft and Y-direction lead screw of Y-direction servo motor is fixedly connected with；The Y-direction screw peace
On Y-direction lead screw, the Mobile base is packed on Y-direction screw, is set with Y-direction guide pad on the Y-direction guide rod, Y-direction is led
It is fixedly connected with to block and Mobile base；The Z-direction lead screw and Z-direction guide rod are packed on Mobile base in parallel, and Z-direction lead screw and Z-direction guide rod
It is vertically arranged and perpendicular with track；The Z-direction servo motor is packed on Mobile base, the motor shaft and Z-direction of Z-direction servo motor
The end of lead screw is fixedly connected with；The Z-direction screw is mounted on Z-direction lead screw, is set with Z-direction guide pad, Z on the Z-direction guide rod
It is fixedly connected with to guide pad and Z-direction screw, microwave radiation fracturing component mounting base is fixed on Z-direction screw.
The microwave radiation fracturing component is equipped with two sets, and a set of is microwave radiation surface fracturing component, and another set of is microwave
Fracturing component in radiating aperture；The microwave radiation surface fracturing component is adaptive including the first microwave generator, the first microwave power
Regulator control system, rectangular waveguide and rock surface fracturing microwave focusing radiator, the first microwave generator is answered to pass sequentially through first
The adaptive regulator control system of microwave power and rectangular waveguide are connected with rock surface fracturing microwave focusing radiator, pass through rock table
Face fracturing microwave focusing radiator carries out surface fracturing to rock sample, and the adaptive regulator control system of the first microwave power is used for the
The microwave power of one microwave generator output carries out impedance real-time matching；Fracturing component includes second micro- in the microwave radiation hole
Fracturing microwave coaxial heater in wave producer, the adaptive regulator control system of the second microwave power, coaxial transmission line and rock pore, the
Two microwave generators pass sequentially through fracturing microwave in the adaptive regulator control system of the second microwave power and coaxial transmission line and rock pore
Coaxial heater is connected, and carries out fracturing in hole, the second microwave to rock sample by fracturing microwave coaxial heater in rock pore
The microwave power that power adaptive regulator control system is used to export the second microwave generator carries out impedance real-time matching.
First microwave generator is identical as the second microwave generator structure, include continuous wave magnetron, permanent magnet,
Waveguide excitation cavity, coaxial annular device, coaxial matched load, coaxial coupling transformer, waveguide coaxial converter and output waveguide；Institute
Permanent magnet is stated using cirque structure, permanent magnet is fixedly set in outside continuous wave magnetron, for mentioning for continuous wave magnetron
For magnetic field；The continuous wave magnetron is connected by conducting wire with power supply, and the Microwave emission head of continuous wave magnetron swashs positioned at waveguide
It encourages intracavitary, direct current energy is converted to by microwave energy by continuous wave magnetron, the microwave energy that continuous wave magnetron generates passes through micro-
It is intracavitary that wave emitting head enters waveguide excitation, and in the intracavitary formation leading mould of waveguide excitation；Three are provided on the coaxial annular device
A port, respectively first port, second port and third port；The waveguide excitation cavity is by coaxial coupling transformer and together
The first port of axis circulator is connected, and the microwave energy that the continuous wave magnetron generates passes sequentially through waveguide excitation cavity and coaxial
Coupling transformer enters in coaxial annular device；The output waveguide passes through the second end of waveguide coaxial converter and coaxial annular device
Mouth is connected, and the microwave energy in coaxial annular device is entered in output waveguide by waveguide coaxial converter, and microwave energy is by same
Axis output mode is converted into waveguide mode；The output waveguide is the microwave delivery outlet of microwave generator；The coaxial matching is negative
The third port for being connected to coaxial annular device is carried, coaxial matched load is used to absorb the microwave reflection function of coaxial annular device isolation
Rate, for protecting coaxial annular device and continuous wave magnetron.
Fracturing microwave coaxial heater includes microwave transmission inner conductor, microwave transmission outer conductor, microwave in the rock pore
Input adapter, microwave short circuit capping and conductor support cylinder；The microwave transmission inner conductor is solid cylinder structure or open circles
Column structure, the microwave transmission outer conductor are cylinder barrel shaped structure, and microwave transmission outer conductor coaxial package is in microwave transmission
On the outside of conductor, microwave transmission inner conductor and microwave transmission outer conductor in coaxial package state be packed in microwave input adapter with
Between microwave short circuit capping；The microwave transmission inner conductor, microwave transmission outer conductor, microwave input adapter and microwave short circuit capping
Between form circumferential space, be filled in circumferential space by conductor support cylinder, by the maintenance microwave transmission of conductor support cylinder
Coaxial state between conductor and microwave transmission outer conductor；Several microwaves are offered on the barrel of the microwave transmission outer conductor
Radiation port is filled with anti-breakdown medium block by the outside microwave radiation energy of microwave radiation mouth in microwave radiation mouth.
The conductor support cylinder and anti-breakdown medium block are all made of electromagnetic wave transparent material and are made；It is the microwave transmission inner conductor, micro-
Wave transmission outer conductor, microwave input adapter and microwave short circuit capping are all made of conductive metallic material and are made；The microwave radiation mouth
Arc strip seam length for arc strip gap-like, microwave radiation mouth is equal to the 2/3 of microwave transmission outer conductor circumferential length；It is described to prevent hitting
It is identical with the shape and size of microwave radiation mouth to wear medium block, several microwave radiation mouths are in microwave transmission outer conductor axial direction side
Upward equidistantly distributed, and adjacent microwave radiation mouth toward each other on the contrary, the spacing between adjacent microwave radiation mouth isWherein, εrFor the relative dielectric constant of electromagnetic wave transparent material；Adjacent microwave radiation mouth is covered with the microwave short circuit, with
Spacing between microwave short circuit capping is 1/2 λp, whereinIn formula, λpFor phase wavelength, λ is microwave wavelength, εrFor
The relative dielectric constant of electromagnetic wave transparent material.
The adaptive regulator control system of first microwave power includes the first impedance matching adjuster, the control of the first microwave power
Device and the first temperature sensor；Described first impedance matching adjuster one end is used to access the micro- of the first microwave generator output
Wave, and the incident power of microwave is recorded in the first impedance matching adjuster；The first impedance matching adjuster other end is used
In output microwave, the microwave of the first impedance matching adjuster output is transmitted to rock surface fracturing microwave by rectangular waveguide and gathers
Burnt radiator, then the surface of rock sample is caused by the microwave that rock surface fracturing microwave focusing radiator gives off
It splits；When the microwave of rock sample reflection passes sequentially through rock surface fracturing microwave focusing radiator and rectangular waveguide is back to the
After one impedance matching adjuster, the reflection power of microwave, the first microwave function are recorded by the first impedance matching adjuster
Rate controller is used to receive the microwave incident power and reflection power of the first impedance matching regulator feedback；First temperature passes
For sensor for acquiring temperature data of the rock sample in microwave fracturing, which is fed directly to the first microwave power control
Device processed, is preset with the reflectance data of rock sample in the first microwave power controller, and the first microwave power controller is first
First using the microwave incident power of the first impedance matching regulator feedback and reflection power as foundation, then pass through temperature data and reflection
Coefficient data calculates the microwave power data for meeting impedance matching, and the first microwave power controller will finally meet impedance matching
Microwave power data feedback into the first impedance matching adjuster, eventually by the first impedance matching adjuster by the first microwave
The microwave power of generator output carries out impedance real-time matching.
The adaptive regulator control system of second microwave power includes the second impedance matching adjuster, the control of the second microwave power
Device and second temperature sensor；Described second impedance matching adjuster one end is used to access the output of the second microwave power controller
Microwave, and the incident power of microwave is recorded in the second impedance matching adjuster；The second impedance matching adjuster other end
For exporting microwave, the microwave of the second impedance matching adjuster output is transmitted to fracturing microwave in rock pore by coaxial transmission line
Coaxial heater, then the petrosal foramen of rock sample is caused by the microwave that fracturing microwave coaxial heater gives off in rock pore
It splits；The is back to when the microwave of rock sample reflection passes sequentially through fracturing microwave coaxial heater and coaxial transmission line in rock pore
After two impedance matching adjusters, the reflection power of microwave, the second microwave function are recorded by the second impedance matching adjuster
Rate controller is used to receive the microwave incident power and reflection power of the second impedance matching regulator feedback；The second temperature passes
For sensor for acquiring temperature data of the rock sample in microwave fracturing, which is fed directly to the second microwave power control
Device processed, is preset with the reflectance data of rock sample in the second microwave power controller, and the second microwave power controller is first
First using the microwave incident power of the second impedance matching regulator feedback and reflection power as foundation, then pass through temperature data and reflection
Coefficient data calculates the microwave power data for meeting impedance matching, and the second microwave power controller will finally meet impedance matching
Microwave power data feedback into the second impedance matching adjuster, eventually by the second impedance matching adjuster by the second microwave
The microwave power of generator output carries out impedance real-time matching.
Beneficial effects of the present invention:
Rock microwave fracturing experimental rig based on true triaxial load of the invention, is not only able to simulation shield machine and TBM
The rotation status of cutterhead, while Surface microwave is carried out to the rock sample under true triaxial load and radiates fracturing, it can also be in fixing shape
Microwave radiation fracturing in hole is carried out to the rock sample under true triaxial load under state, and then obtains rock under different stress and tries
The microwave Fracturing effect of sample.
Detailed description of the invention
Fig. 1 is that a kind of rock microwave fracturing experimental rig based on true triaxial load of the invention (is equipped with microwave radiation
Surface fracturing component and gauze screen is not shown) perspective view；
Fig. 2 is that a kind of rock microwave fracturing experimental rig based on true triaxial load of the invention (is equipped with microwave radiation
Surface fracturing component) front view；
Fig. 3 is that a kind of rock microwave fracturing experimental rig based on true triaxial load of the invention (is equipped with microwave radiation
In hole fracturing component and gauze screen is not shown) perspective view；
Fig. 4 is that a kind of rock microwave fracturing experimental rig based on true triaxial load of the invention (is equipped with microwave radiation
Fracturing component in hole) front view；
Fig. 5 is the perspective view of two-freedom movable stand；
Fig. 6 is the front view of two-freedom movable stand；
Fig. 7 is the first microwave generator/second microwave generator structural schematic diagram；
Fig. 8 is the first microwave generator/second microwave generator work flow diagram；
Fig. 9 is the structural schematic diagram of fracturing microwave coaxial heater in rock pore；
Figure 10 is A-A cross-sectional view in Fig. 9；
Figure 11 is B-B cross-sectional view in Fig. 9；
Figure 12 is the structural block diagram of the adaptive regulator control system of the first microwave power；
Figure 13 is the structural block diagram of the adaptive regulator control system of the second microwave power；
In figure, 1-fixed loading frame, 2-mobile loading frames, 3-pedestals, 4-tracks, 5-slide units, 6-
First Z-direction actuator, the 7-the second Z-direction actuator, the 8-the first Y-direction actuator, 9-X to servo motor, 10-X to lead screw,
11-rock samples, 12-X are to actuator, 13-fixing seats, 14-Y-direction lead screws, 15-Y-direction guide rods, 16-Y-direction screws,
17-Y-direction servo motors, 18-Mobile bases, 19-Z-direction lead screws, 20-Z-direction guide rods, 21-Z-direction screws, 22-Z-direction servo electricity
Machine, 23-Y-direction guide pads, 24-Z-direction guide pads, 25-microwave radiation fracturing component mounting bases, the 26-the first microwave generator,
The adaptive regulator control system of 27-the first microwave power, 28-rectangular waveguides, 29-rock surface fracturing microwave focusing radiators,
30-the second microwave generator, the adaptive regulator control system of the 31-the second microwave power, 32-coaxial transmission lines, in 33-rock pores
Fracturing microwave coaxial heater, 34-continuous wave magnetrons, 35-permanent magnets, 36-waveguide excitation cavities, 37-coaxial annular devices,
38-coaxial matched loads, 39-coaxial coupling transformers, 40-waveguide coaxial converters, 41-output waveguides, 42-microwaves
Transmit inner conductor, 43-microwave transmission outer conductors, 44-microwave input adapters, 45-microwave short circuits capping, 46-conductor supports
Cylinder, 47-microwave radiation mouths, 48-anti-breakdown medium blocks, 49-radiating surface micro-wave screening nets, 50-loading surface micro-wave screening nets.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in figs. 1-13, a kind of rock microwave fracturing experimental rig based on true triaxial load, including true triaxial load
Component and microwave radiation fracturing component；The true triaxial charging assembly include fixed loading frame 1, mobile loading frame 2,
Pedestal 3, track 4, slide unit 5 and two-freedom movable stand；The fixed loading frame 1 uses hollow structure, fixed to add
The central space for carrying frame 1 is rock sample LOADED CAVITY；Fixed loading frame 1 right above the rock sample LOADED CAVITY
On be provided with the first Z-direction actuator 6, be provided with the second Z-direction on the fixed loading frame 1 immediately below rock sample LOADED CAVITY
Actuator 7 is provided with the first Y-direction actuator 8 on the fixed loading frame 1 on the left of rock sample LOADED CAVITY, tries in rock
The second Y-direction actuator is provided on fixed loading frame 1 on the right side of sample LOADED CAVITY；The pedestal 3 divides for front end pedestal with after
Pedestal is held, front end pedestal is located on the ground in front of rock sample LOADED CAVITY, and rear end pedestal is located at rock sample LOADED CAVITY rear
Ground on；The track 4 passes through the rock sample LOADED CAVITY of fixed loading frame 1, and track 4 and front end pedestal, fixation
Formula loading frame 1 and rear end pedestal are solidly installed simultaneously；The slide unit 5 is arranged in front of rock sample LOADED CAVITY by sliding block
Track 4 on, X is installed on the front end pedestal to servo motor 9, is fixed with X to screw in 5 lower surface of slide unit, X to
X is coated in screw to lead screw 10, X is parallel with track 4 to lead screw 10, motor shaft from the X to servo motor 9 and X to silk
10 end of thick stick is fixedly connected with；The microwave radiation fracturing component is mounted on slide unit 5 by two-freedom movable stand；The movable type
Loading frame 2 is arranged on track 4 by sliding block, and mobile loading frame 2 includes front support plate, rear end support plate and level
Support column, front support plate are fixedly connected with rear end support plate by horizontally-supported column, and microwave cause is offered on front support plate
Ceasma, and the aperture size in microwave fracturing hole is less than the loading surface size of rock sample 11；It is arranged in the rear end support plate
There is X to actuator 12；The first Z-direction actuator 6, the second Z-direction actuator 7, the first Y-direction actuator 8, the second Y-direction actuator
And X is identical to 12 structure of actuator, and is each equipped with load cell and displacement sensor, for measuring the load value of actuator
And shift value.
Radiating surface micro-wave screening net 49 is installed in the front of the front support plate of the mobile loading frame 2, preceding
The back side of end support plate is equipped with loading surface micro-wave screening net 50, and microwave radiation cause is provided on radiating surface micro-wave screening net 49
Component mounting hole is split, actuator rigid pressure head mounting hole is provided on loading surface micro-wave screening net 50；It is described based on true three
The rock microwave fracturing experimental rig of axis load is electromagnetically shielded interior between being integrally provided in one, it is outdoor that console is located at electromagnetic shielding
Portion.
The two-freedom movable stand includes fixing seat 13, Y-direction lead screw 14, Y-direction guide rod 15, Y-direction screw 16, Y-direction servo
Motor 17, Mobile base 18, Z-direction lead screw 19, Z-direction guide rod 20, Z-direction screw 21 and Z-direction servo motor 22；The fixing seat 13 is fixedly mounted with
In 5 upper surface of slide unit, the Y-direction lead screw 14 and Y-direction guide rod 15 are packed in parallel in fixing seat 13, Y-direction lead screw 14 and Y-direction guide rod
15 is horizontally disposed and perpendicular with track 4；The Y-direction servo motor 17 is packed in fixing seat 13, the electricity of Y-direction servo motor 17
The end of arbor and Y-direction lead screw 14 is fixedly connected with；The Y-direction screw 16 is mounted on Y-direction lead screw 14, and the Mobile base 18 is packed in
On Y-direction screw 16, Y-direction guide pad 23 is set on the Y-direction guide rod 15, Y-direction guide pad 23 is fixedly connected with Mobile base 18；Institute
State Z-direction lead screw 19 and Z-direction guide rod 20 be packed in parallel on Mobile base 18, and Z-direction lead screw 19 and Z-direction guide rod 20 be vertically arranged and with
Track 4 is perpendicular；The Z-direction servo motor 22 is packed on Mobile base 18, the motor shaft and Z-direction lead screw of Z-direction servo motor 22
19 end is fixedly connected with；The Z-direction screw 21 is mounted on Z-direction lead screw 19, and Z-direction guiding is set on the Z-direction guide rod 20
Block 24, Z-direction guide pad 24 are fixedly connected with Z-direction screw 21, and microwave radiation fracturing component mounting base is fixed on Z-direction screw 21
25。
The microwave radiation fracturing component is equipped with two sets, and a set of is microwave radiation surface fracturing component, and another set of is microwave
Fracturing component in radiating aperture；The microwave radiation surface fracturing component include the first microwave generator 26, the first microwave power from
Adapt to regulator control system 27, rectangular waveguide 28 and rock surface fracturing microwave focusing radiator 29, the first microwave generator 26 according to
It is secondary to pass through the adaptive regulator control system 27 of the first microwave power and rectangular waveguide 28 and rock surface fracturing microwave focusing radiator
29 are connected, and carry out surface fracturing, the first microwave power to rock sample 11 by rock surface fracturing microwave focusing radiator 29
The microwave power that adaptive regulator control system 27 is used to export the first microwave generator 26 carries out impedance real-time matching；The microwave
Fracturing component includes the second microwave generator 30, the adaptive regulator control system 31 of the second microwave power, coaxial transmission line in radiating aperture
32 and rock pore in fracturing microwave coaxial heater 33, the second microwave generator 30 passes sequentially through the second microwave power and adaptively adjusts
Control system 31 and coaxial transmission line 32 are connected with fracturing microwave coaxial heater 33 in rock pore, pass through fracturing microwave in rock pore
Coaxial heater 33 carries out fracturing in hole to rock sample 11, and the adaptive regulator control system 31 of the second microwave power is used for micro- by second
The microwave power that wave producer 30 exports carries out impedance real-time matching.
First microwave generator 26 is identical as 30 structure of the second microwave generator, include continuous wave magnetron 34,
Permanent magnet 35, waveguide excitation cavity 36, coaxial annular device 37, coaxial matched load 38, coaxial coupling transformer 39, Waveguide coaxial turn
Parallel operation 40 and output waveguide 41；The permanent magnet 35 uses cirque structure, and permanent magnet 35 is fixedly set in continuous wave magnetron
Outside 34, for providing magnetic field for continuous wave magnetron 34；The continuous wave magnetron 34 is connected by conducting wire with power supply, continuously
The Microwave emission head of wave magnetron 34 is located in waveguide excitation cavity 36, is converted to direct current energy by continuous wave magnetron 34 micro-
Wave energy, the microwave energy that continuous wave magnetron 34 generates are entered in waveguide excitation cavity 36 by Microwave emission head, and in waveguide excitation
Leading mould is formed in chamber 36；Setting is there are three port on the coaxial annular device 37, respectively first port, second port and the
Three ports；The waveguide excitation cavity 36 is connected by coaxial coupling transformer 39 with the first port of coaxial annular device 37, institute
The microwave energy for stating the generation of continuous wave magnetron 34 passes sequentially through waveguide excitation cavity 36 and coaxial coupling transformer 39 enters coaxial rings
In shape device 37；The output waveguide 41 is connected by waveguide coaxial converter 40 with the second port of coaxial annular device 37, together
Microwave energy in axis circulator 37 is entered in output waveguide 41 by waveguide coaxial converter 40, and microwave energy is by coaxially exporting
Mode is converted into waveguide mode；The output waveguide 41 is the microwave delivery outlet of microwave generator；The coaxial matched load 38
It is connected to the third port of coaxial annular device 37, coaxial matched load 38 is used to absorb the microwave reflection of the isolation of coaxial annular device 37
Power, for protecting coaxial annular device 37 and continuous wave magnetron 34.
Fracturing microwave coaxial heater 33 includes microwave transmission inner conductor 42, microwave transmission outer conductor in the rock pore
43, microwave input adapter 44, microwave short circuit capping 45 and conductor support cylinder 46；The microwave transmission inner conductor 42 is solid cylinder
Body structure or hollow cylindrical structure, the microwave transmission outer conductor 43 are cylinder barrel shaped structure, and microwave transmission outer conductor 43 is same
Axle sleeve is led outside the microwave transmission inner conductor 42 of coaxial package state and microwave transmission mounted in 42 outside of microwave transmission inner conductor
Body 43 is packed between microwave input adapter 44 and microwave short circuit capping 45；Outside the microwave transmission inner conductor 42, microwave transmission
Conductor 43, microwave input adapter 44 and microwave short circuit cover and form circumferential space between 45, by conductor support cylinder in circumferential space
46 are filled, and maintain the coaxial between microwave transmission inner conductor 42 and microwave transmission outer conductor 43 by conductor support cylinder 46
State；Several microwave radiation mouths 47 are offered on the barrel of the microwave transmission outer conductor 43, it is outside by microwave radiation mouth 47
Microwave radiation energy is filled with anti-breakdown medium block 48 in microwave radiation mouth 47.
The conductor support cylinder 46 and anti-breakdown medium block 48 are all made of electromagnetic wave transparent material and are made, in the present embodiment, wave transparent material
Material selects polytetrafluoroethylene (PTFE)；The microwave transmission inner conductor 42, microwave transmission outer conductor 43, microwave input adapter 44 and microwave are short
Road capping 45 is all made of conductive metallic material and is made, and in the present embodiment, conductive metallic material selects copper；The microwave radiation mouth 47
Arc strip seam length for arc strip gap-like, microwave radiation mouth 47 is equal to the 2/3 of 43 circumferential length of microwave transmission outer conductor, due to
The presence of the microwave radiation mouth 47 of arc strip gap-like, cut the current line of 43 inner wall of microwave transmission outer conductor, and then make micro-
Amplitude loophole 47 is activated and outside microwave radiation energy；The shape of the anti-breakdown medium block 48 and microwave radiation mouth 47 and
Size is identical, several microwave radiation mouths 47 equidistantly distributed on 43 axial direction of microwave transmission outer conductor, and adjacent
Microwave radiation mouth 47 toward each other on the contrary, the spacing between adjacent microwave radiation mouth 47 isWherein, εrFor wave transparent material
The relative dielectric constant of material；Due to being filled between microwave transmission inner conductor 42 and microwave transmission outer conductor 43 by electromagnetic wave transparent material
Manufactured conductor support cylinder 46, can make the spacing between adjacent microwave radiation mouth 47 be onlyAnd in limited length
On microwave transmission outer conductor 43, the quantity of microwave radiation mouth 47 is effectively increased, can not only guarantee that the heating of microwave radiation is equal
Even property, is also greatly improved the power capacity of heater；45 adjacent microwave radiation mouths 47 are covered with the microwave short circuit,
Spacing between microwave short circuit capping 45 is 1/2 λp, whereinIn formula, λpFor phase wavelength, λ is microwave wavelength,
εrFor the relative dielectric constant of electromagnetic wave transparent material.In this way, ensure that the location of each microwave radiation mouth 47 is microwave
Wave crest, that is, ensure that each microwave radiation mouth 47 can obtain maximum excitation.
The adaptive regulator control system 27 of first microwave power includes the first impedance matching adjuster, the first microwave power control
Device processed and the first temperature sensor；Described first impedance matching adjuster one end is used to access the output of the first microwave generator 26
Microwave, and the incident power of microwave is recorded in the first impedance matching adjuster；The first impedance matching adjuster other end
For exporting microwave, it is micro- that the microwave of the first impedance matching adjuster output by rectangular waveguide 28 is transmitted to rock surface fracturing
Wave focusing radiator 29, then the microwave that is given off by rock surface fracturing microwave focusing radiator 29 is to the table of rock sample 11
Face carries out fracturing；When the microwave that rock sample 11 reflects passes sequentially through rock surface fracturing microwave focusing radiator 29 and rectangular wave
After conduit 28 is back to the first impedance matching adjuster, the reflection power of microwave is recorded by the first impedance matching adjuster,
The first microwave power controller is used to receive the microwave incident power and reflection power of the first impedance matching regulator feedback；
For acquiring temperature data of the rock sample 11 in microwave fracturing, which directly feeds back first temperature sensor
To the first microwave power controller, the reflectance data of rock sample 11 is preset in the first microwave power controller, the
One microwave power controller first using the microwave incident power of the first impedance matching regulator feedback and reflection power as foundation, then
The microwave power data for meeting impedance matching, the first microwave power controller are calculated by temperature data and reflectance data
The microwave power data feedback of impedance matching will finally be met into the first impedance matching adjuster, eventually by the first impedance
Impedance real-time matching is carried out with the microwave power that adjuster exports the first microwave generator 26.
The adaptive regulator control system 31 of second microwave power includes the second impedance matching adjuster, the second microwave power control
Device processed and second temperature sensor；Described second impedance matching adjuster one end is for accessing the output of the second microwave power controller
Microwave, and the incident power of microwave is recorded in the second impedance matching adjuster；The second impedance matching adjuster is another
End is transmitted to fracturing in rock pore by coaxial transmission line 32 for exporting microwave, the microwave of the second impedance matching adjuster output
Microwave coaxial heater 33, then the microwave given off by fracturing microwave coaxial heater 33 in rock pore is to rock sample 11
Petrosal foramen carries out fracturing；When the microwave that rock sample 11 reflects passes sequentially through in rock pore fracturing microwave coaxial heater 33 and coaxial
After transmission line 32 is back to the second impedance matching adjuster, the reflection function of microwave is recorded by the second impedance matching adjuster
Rate, the second microwave power controller are used to receive the microwave incident power and reflection function of the second impedance matching regulator feedback
Rate；For the second temperature sensor for acquiring temperature data of the rock sample 11 in microwave fracturing, the temperature data is direct
The second microwave power controller is fed back to, the reflection coefficient number of rock sample 11 is preset in the second microwave power controller
According to, the second microwave power controller first with the microwave incident power of the second impedance matching regulator feedback and reflection power be according to
According to, then the microwave power data for meeting impedance matching, the second microwave power are calculated by temperature data and reflectance data
Controller will finally meet the microwave power data feedback of impedance matching into the second impedance matching adjuster, eventually by second
The microwave power that impedance matching adjuster exports the second microwave generator 30 carries out impedance real-time matching.
Illustrate first use process of the invention with reference to the accompanying drawing:
In the present embodiment, rock sample 11 is the cube of side length 500mm, the first Z-direction actuator 6, the second Z-direction actuator
7, the first Y-direction actuator 8, the second Y-direction actuator and X are 5000kN to the maximum load load of actuator 12, and X is to, Y-direction
And Z-direction can be used as maximum principal stress, and σ may be implemented1=σ2=σ3、σ1=σ2≠σ3、σ1≠σ2=σ3、σ1=σ3≠σ2And σ1
≠σ2≠σ3Stress state, wherein σ1It is X to principal stress, σ2For Y-direction principal stress, σ3For Z-direction principal stress.
By taking true triaxial loads down to the progress Surface microwave radiation fracturing of rock sample 11 as an example, first by microwave radiation surface
Fracturing component is installed in the microwave radiation fracturing component mounting base 25 of two-freedom movable stand, then tries the rock prepared
11 clamping of sample carries out load on to rock sample 11 in place, according to pre-set load parameter, to simulate accordingly
Ambient stress.Before test, go through whether a gauze screen is accurately installed in place, it is ensured that without microwave leakage when test, to protect
Confirmatory test result is interference-free, and last experimenter all exits electromagnetic shielding chamber.
Start to test, first the movement of control two-freedom movable stand, passes through Y-direction servo motor 17 and Z-direction servo motor 22
Linkage, moves microwave radiation fracturing component mounting base 25 in YZ plane, and the fortune of microwave radiation fracturing component mounting base 25
Dynamic rail mark simulates motion track when shield machine and TBM cutterhead rotate, and then starts the of microwave radiation surface fracturing component
The microwave of one microwave generator 26, the output of the first microwave generator 26 passes sequentially through the adaptive regulator control system 27 of the first microwave power
And rectangular waveguide 28 enters rock surface fracturing microwave focusing radiator 29, focuses spoke eventually by rock surface fracturing microwave
Microwave energy to the surface of rock sample 11 is realized to the surface fracturing of rock sample 11, is recorded simultaneously by emitter 29
The deformation data of rock sample 11.
It is loaded down by true triaxial and rock sample 11 is carried out in hole for microwave radiation fracturing, it first will be in microwave radiation hole
Fracturing component is installed in the microwave radiation fracturing component mounting base 25 of two-freedom movable stand, then tries the rock prepared
11 clamping of sample in place, in advance processes petrosal foramen on rock sample 11, then is acted by X to servo motor 9, by microwave spoke
Fracturing microwave coaxial heater 33 accurately protrudes into petrosal foramen in the rock pore of fracturing component in perforation, finally according to pre-set
Load parameter to rock sample 11 carry out load on, to simulate corresponding ground stress environment.Before test, go through one time
Whether gauze screen is accurately installed in place, it is ensured that and it is interference-free with guarantee test result without microwave leakage when test, finally test people
Member all exits electromagnetic shielding chamber.
Start to test, starts the second microwave generator 30 of fracturing component in microwave radiation hole, the second microwave generator 30
The microwave of output passes sequentially through the adaptive regulator control system 31 of the second microwave power and coaxial transmission line 32 enters fracturing in rock pore
Microwave coaxial heater 33, eventually by fracturing microwave coaxial heater 33 in rock pore by microwave energy to rock sample
11 petrosal foramen inner surface is realized to fracturing in the hole of rock sample 11, while recording the deformation data of rock sample 11.
The scope of patent protection that scheme in embodiment is not intended to limit the invention, it is all without departing from carried out by the present invention etc.
Effect implements or change, is both contained in the scope of the patents of this case.
Claims (8)
1. a kind of rock microwave fracturing experimental rig based on true triaxial load, it is characterised in that: including true triaxial charging assembly
With microwave radiation fracturing component；The true triaxial charging assembly include fixed loading frame, mobile loading frame, pedestal,
Track, slide unit and two-freedom movable stand；The fixed loading frame uses hollow structure, in fixed loading frame
Portion space is rock sample LOADED CAVITY；First is provided on the fixed loading frame right above the rock sample LOADED CAVITY
Z-direction actuator is provided with the second Z-direction actuator, in rock on the fixed loading frame immediately below rock sample LOADED CAVITY
The first Y-direction actuator, consolidating on the right side of rock sample LOADED CAVITY are provided on fixed loading frame on the left of sample LOADED CAVITY
The second Y-direction actuator is provided on fixed pattern loading frame；The pedestal is divided into front end pedestal and rear end pedestal, and front end pedestal is located at
On ground in front of rock sample LOADED CAVITY, rear end pedestal is located on the ground at rock sample LOADED CAVITY rear；The track is worn
The rock sample LOADED CAVITY of fixed loading frame is crossed, and track and front end pedestal, fixed loading frame and rear end pedestal are same
When be solidly installed；The slide unit is arranged on the track in front of rock sample LOADED CAVITY by sliding block, in the front end pedestal
On X is installed to servo motor, be fixed with X to screw in slide unit lower surface, be coated with X into screw to lead screw in X, X is to silk
Thick stick is parallel to the track, and the X is fixedly connected with to the motor shaft and X of servo motor to lead screw end；The microwave radiation fracturing group
Part is mounted on slide unit by two-freedom movable stand；The movable type loading frame is arranged in orbit by sliding block, mobile
Formula loading frame includes front support plate, rear end support plate and horizontally-supported column, and front support plate and rear end support plate pass through water
Flat support column is fixedly connected with, and microwave fracturing hole is offered on front support plate, and the aperture size in microwave fracturing hole is less than rock
The loading surface size of sample；X is provided with to actuator in the rear end support plate；The first Z-direction actuator, the second Z-direction
Actuator, the first Y-direction actuator, the second Y-direction actuator and X are identical to actuator configurations, and be each equipped with load cell and
Displacement sensor, for measuring the load value and shift value of actuator；The microwave radiation fracturing component is equipped with two sets, Yi Taowei
Microwave radiation surface fracturing component, it is another set of for fracturing component in microwave radiation hole；The microwave radiation surface fracturing component packet
The first microwave generator, the adaptive regulator control system of the first microwave power, rectangular waveguide and rock surface fracturing microwave is included to focus
Radiator, the first microwave generator pass sequentially through the adaptive regulator control system of the first microwave power and rectangular waveguide and rock surface
Fracturing microwave focusing radiator is connected, and carries out surface fracturing to rock sample by rock surface fracturing microwave focusing radiator,
The microwave power that the adaptive regulator control system of first microwave power is used to export the first microwave generator carries out impedance real-time matching；
Fracturing component includes the second microwave generator, the adaptive regulator control system of the second microwave power, coaxial biography in the microwave radiation hole
Fracturing microwave coaxial heater in defeated line and rock pore, the second microwave generator pass sequentially through the second microwave power and adaptively regulate and control
System and coaxial transmission line are connected with fracturing microwave coaxial heater in rock pore, are heated by fracturing microwave coaxial in rock pore
Device carries out fracturing in hole to rock sample, what the adaptive regulator control system of the second microwave power was used to export the second microwave generator
Microwave power carries out impedance real-time matching.
2. a kind of rock microwave fracturing experimental rig based on true triaxial load according to claim 1, it is characterised in that:
Radiating surface micro-wave screening net is installed in the front of the front support plate of the mobile loading frame, in the back of front support plate
Face is equipped with loading surface micro-wave screening net, is provided with microwave radiation fracturing component mounting hole on the net in radiating surface micro-wave screening,
Loading surface micro-wave screening is provided with actuator rigid pressure head mounting hole on the net；The rock microwave based on true triaxial load causes
It splits and is electromagnetically shielded interior between experimental rig is integrally provided in one, console is located at electromagnetic shielding outdoor.
3. a kind of rock microwave fracturing experimental rig based on true triaxial load according to claim 1, it is characterised in that:
The two-freedom movable stand includes fixing seat, Y-direction lead screw, Y-direction guide rod, Y-direction screw, Y-direction servo motor, Mobile base, Z-direction silk
Thick stick, Z-direction guide rod, Z-direction screw and Z-direction servo motor；The fixing seat is packed in slide unit upper surface, and the Y-direction lead screw and Y-direction are led
Bar is packed in fixing seat in parallel, and Y-direction lead screw and Y-direction guide rod are horizontally disposed and perpendicular with track；The Y-direction servo motor is solid
In fixing seat, the end of the motor shaft and Y-direction lead screw of Y-direction servo motor is fixedly connected with；The Y-direction screw is mounted on Y-direction silk
On thick stick, the Mobile base is packed on Y-direction screw, and Y-direction guide pad, Y-direction guide pad and movement are set on the Y-direction guide rod
Seat is fixedly connected with；The Z-direction lead screw and Z-direction guide rod are packed on Mobile base in parallel, and Z-direction lead screw and Z-direction guide rod be vertically arranged and
It is perpendicular with track；The Z-direction servo motor is packed on Mobile base, the motor shaft of Z-direction servo motor and the end of Z-direction lead screw
It is fixedly connected with；The Z-direction screw is mounted on Z-direction lead screw, and Z-direction guide pad, Z-direction guide pad and Z are set on the Z-direction guide rod
It is fixedly connected with to screw, microwave radiation fracturing component mounting base is fixed on Z-direction screw.
4. a kind of rock microwave fracturing experimental rig based on true triaxial load according to claim 1, it is characterised in that:
First microwave generator is identical as the second microwave generator structure, includes continuous wave magnetron, permanent magnet, waveguide excitation
Chamber, coaxial annular device, coaxial matched load, coaxial coupling transformer, waveguide coaxial converter and output waveguide；The permanent magnet
Using cirque structure, permanent magnet is fixedly set in outside continuous wave magnetron, for providing magnetic field for continuous wave magnetron；Institute
It states continuous wave magnetron and is connected with power supply by conducting wire, it is intracavitary that the Microwave emission head of continuous wave magnetron is located at waveguide excitation, logical
Cross continuous wave magnetron and direct current energy be converted into microwave energy, the microwave energy that continuous wave magnetron generates by Microwave emission head into
It is intracavitary to enter waveguide excitation, and in the intracavitary formation leading mould of waveguide excitation；There are three ports for setting on the coaxial annular device, respectively
For first port, second port and third port；The waveguide excitation cavity passes through coaxial coupling transformer and coaxial annular device
First port is connected, and the microwave energy that the continuous wave magnetron generates passes sequentially through waveguide excitation cavity and coaxial coupling transformer
Into in coaxial annular device；The output waveguide is connected by waveguide coaxial converter with the second port of coaxial annular device,
Microwave energy in coaxial annular device is entered in output waveguide by waveguide coaxial converter, and microwave energy is by coaxial output mode
It is converted into waveguide mode；The output waveguide is the microwave delivery outlet of microwave generator；The coaxial matched load is connected to together
The third port of axis circulator, coaxial matched load is used to absorb the microwave reflection power of coaxial annular device isolation, for protecting
Coaxial annular device and continuous wave magnetron.
5. a kind of rock microwave fracturing experimental rig based on true triaxial load according to claim 1, it is characterised in that:
In the rock pore fracturing microwave coaxial heater include microwave transmission inner conductor, microwave transmission outer conductor, microwave input adapter,
Microwave short circuit capping and conductor support cylinder；The microwave transmission inner conductor be solid cylinder structure or hollow cylindrical structure,
The microwave transmission outer conductor be cylinder barrel shaped structure, microwave transmission outer conductor coaxial package on the outside of microwave transmission inner conductor,
Microwave transmission inner conductor and microwave transmission outer conductor in coaxial package state are packed in microwave input adapter and microwave short circuit
Between capping；It is formed between the microwave transmission inner conductor, microwave transmission outer conductor, microwave input adapter and microwave short circuit capping
Circumferential space is filled in circumferential space by conductor support cylinder, by conductor support cylinder maintain microwave transmission inner conductor with it is micro-
Wave transmits the coaxial state between outer conductor；Several microwave radiation mouths are offered on the barrel of the microwave transmission outer conductor,
By the outside microwave radiation energy of microwave radiation mouth, anti-breakdown medium block is filled in microwave radiation mouth.
6. a kind of rock microwave fracturing experimental rig based on true triaxial load according to claim 5, it is characterised in that:
The conductor support cylinder and anti-breakdown medium block are all made of electromagnetic wave transparent material and are made；Outside the microwave transmission inner conductor, microwave transmission
Conductor, microwave input adapter and microwave short circuit capping are all made of conductive metallic material and are made；The microwave radiation mouth is arc strip
The arc strip seam length of gap-like, microwave radiation mouth is equal to the 2/3 of microwave transmission outer conductor circumferential length；The anti-breakdown medium block
It is identical with the shape and size of microwave radiation mouth, between several microwave radiation mouths are equal on microwave transmission outer conductor axial direction
Away from distribution, and adjacent microwave radiation mouth toward each other on the contrary, the spacing between adjacent microwave radiation mouth isWherein,
εrFor the relative dielectric constant of electromagnetic wave transparent material；Adjacent microwave radiation mouth is covered with the microwave short circuit, with microwave short circuit seal
Spacing between lid is 1/2 λp, whereinIn formula, λpFor phase wavelength, λ is microwave wavelength, εrFor electromagnetic wave transparent material
Relative dielectric constant.
7. a kind of rock microwave fracturing experimental rig based on true triaxial load according to claim 1, it is characterised in that:
The adaptive regulator control system of first microwave power includes the first impedance matching adjuster, the first microwave power controller and first
Temperature sensor；Described first impedance matching adjuster one end is used to access the microwave of the first microwave generator output, and microwave
Incident power be recorded in the first impedance matching adjuster；The first impedance matching adjuster other end is micro- for exporting
The microwave of wave, the output of the first impedance matching adjuster is transmitted to rock surface fracturing microwave focused radiation by rectangular waveguide
Device, then the microwave given off by rock surface fracturing microwave focusing radiator carry out fracturing to the surface of rock sample；Work as rock
The microwave of stone sample reflection passes sequentially through rock surface fracturing microwave focusing radiator and rectangular waveguide is back to the first impedance
After matching adjuster, the reflection power of microwave, the first microwave power control are recorded by the first impedance matching adjuster
Device is used to receive the microwave incident power and reflection power of the first impedance matching regulator feedback；First temperature sensor is used
In acquiring temperature data of the rock sample in microwave fracturing when, which is fed directly to the first microwave power controller,
The reflectance data of rock sample is preset in the first microwave power controller, the first microwave power controller is first with
The microwave incident power and reflection power of one impedance matching regulator feedback are foundation, then pass through temperature data and reflection coefficient number
According to the microwave power data for meeting impedance matching are calculated, the first microwave power controller will finally meet the microwave of impedance matching
Power data is fed back into the first impedance matching adjuster, eventually by the first impedance matching adjuster by the first microwave generator
The microwave power of output carries out impedance real-time matching.
8. a kind of rock microwave fracturing experimental rig based on true triaxial load according to claim 1, it is characterised in that:
The adaptive regulator control system of second microwave power includes the second impedance matching adjuster, the second microwave power controller and second
Temperature sensor；Described second impedance matching adjuster one end is used to access the microwave of the second microwave power controller output, and
The incident power of microwave is recorded in the second impedance matching adjuster；The second impedance matching adjuster other end is for exporting
Microwave, the microwave of the second impedance matching adjuster output are transmitted to fracturing microwave coaxial in rock pore by coaxial transmission line and heat
Device, then fracturing is carried out to the petrosal foramen of rock sample by the microwave that fracturing microwave coaxial heater gives off in rock pore；Work as rock
The microwave of stone sample reflection passes sequentially through fracturing microwave coaxial heater and coaxial transmission line in rock pore and is back to the second impedance
After matching adjuster, the reflection power of microwave, the second microwave power control are recorded by the second impedance matching adjuster
Device is used to receive the microwave incident power and reflection power of the second impedance matching regulator feedback；The second temperature sensor is used
In acquiring temperature data of the rock sample in microwave fracturing when, which is fed directly to the second microwave power controller,
The reflectance data of rock sample is preset in the second microwave power controller, the second microwave power controller is first with
The microwave incident power and reflection power of two impedance matching regulator feedbacks are foundation, then pass through temperature data and reflection coefficient number
According to the microwave power data for meeting impedance matching are calculated, the second microwave power controller will finally meet the microwave of impedance matching
Power data is fed back into the second impedance matching adjuster, eventually by the second impedance matching adjuster by the second microwave generator
The microwave power of output carries out impedance real-time matching.
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| CN115290752B (en) * | 2022-08-03 | 2024-09-10 | 东北大学 | Microwave parameter active adjustment rotary fracturing deep hard rock device and use method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2703263A1 (en) * | 1977-01-27 | 1978-08-10 | Bbc Brown Boveri & Cie | Container pressure testing procedure - used for aluminium housings to receive electrical switches and employing blast waves stressing walls |
| CN104390859A (en) * | 2014-11-18 | 2015-03-04 | 山东科技大学 | True triaxial simulation test device for three-directional rigid loading impact ground pressure |
| CN106769498A (en) * | 2016-11-22 | 2017-05-31 | 东北大学 | The power thermal coupling loading device and test method of rock sample under microwave |
| CN207197948U (en) * | 2017-08-06 | 2018-04-06 | 吉林大学 | Microwave heating equipment for true triaxial hydraulic fracturing simulated experiment |
-
2018
- 2018-05-11 CN CN201810446927.6A patent/CN108678761B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2703263A1 (en) * | 1977-01-27 | 1978-08-10 | Bbc Brown Boveri & Cie | Container pressure testing procedure - used for aluminium housings to receive electrical switches and employing blast waves stressing walls |
| CN104390859A (en) * | 2014-11-18 | 2015-03-04 | 山东科技大学 | True triaxial simulation test device for three-directional rigid loading impact ground pressure |
| CN106769498A (en) * | 2016-11-22 | 2017-05-31 | 东北大学 | The power thermal coupling loading device and test method of rock sample under microwave |
| CN207197948U (en) * | 2017-08-06 | 2018-04-06 | 吉林大学 | Microwave heating equipment for true triaxial hydraulic fracturing simulated experiment |
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