CN105865929A - Rock material fracture characteristic test system and method thereof - Google Patents
Rock material fracture characteristic test system and method thereof Download PDFInfo
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- CN105865929A CN105865929A CN201610192760.6A CN201610192760A CN105865929A CN 105865929 A CN105865929 A CN 105865929A CN 201610192760 A CN201610192760 A CN 201610192760A CN 105865929 A CN105865929 A CN 105865929A
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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
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
Abstract
The invention discloses a rock material fracture characteristic test system and a method thereof. The system has a simple structure and a good breaking effect. The rock material fracture characteristic test system comprises a high pressure laboratory, a high pressure gas supply system, a pressure relief system and a data acquisition system; the high pressure laboratory is a steel-made cylindrical structure, and a circular baffle plate is arranged in the laboratory along the radical direction of the laboratory, and divides the internal of the laboratory into two parts; and a gap is arranged between the circumferential surface and the inner wall of the circular baffle plate, and a filter screen used for blocking rock material particles and allowing a high pressure gas to pass is arranged in the gap. The high pressure laboratory is provided with a gas inlet hole, a pressure sensor installing hole and an acceleration sensor installing hole, and the high pressure gas supply system is connected with the gas inlet hole; the outlet end of a high pressure gas aggregation chamber is connected with a first flange, the smaller caliber end of the first flange is a high pressure gas protrusion hole, and the first flange is connected with a second flange through a sealing flange; the pressure relief system is arranged on the second flange, and the other end of the pressure relief system is provided with a silencer; and the data acquisition system is connected with a pressure sensor and an acceleration system.
Description
Technical field
The present invention relates to a kind of rock type materials cracking properties pilot system and method.
Background technology
It is solid under corresponding continuum Model by material experiment-machine stress-strain relation and criterion of strength
The basis of mechanics.Tai Shaji introduces the principle of effective stress that pore water pressure proposes, and creates soil power
Learn test method, define soil mechanics branch.Rock (rock mass) material contains hole, crack, its
State of rupture and cracking properties ought to be the experiment basis of rock mechanics, were also the passes of rock mass engineering project catastrophe
Key problem in science.Hole, crack and their the complicated and orderly rows that the inside of rock material is abundant
Row, make rock have stronger non-homogeneous, noncontinuity and multiple dimensioned fragmentation effect, and these are also
The crucial science key element of understanding rock failure mechanism of rock rule.But relevant test method is not the most broken away from all
Even medium is assumed and for the purpose of obtaining constitutive relation, is not enough to recognize the internal rupture state of rock,
Test method awaits breaking through.A kind of brand-new catalase characteristic test method and equipment are proposed to grinding
Breakage properties and the failure evolvement rule of studying carefully rock type materials have great importance.
At gases at high pressure (N2Or CO2) broken rock detritus aspect, Chinese scholars has also been carried out substantial amounts of
Experiment work.Guo Zhixing (1994) utilizes the CO of liquefaction2As the medium of transmission brisance, quick-fried
By the CO of liquefaction before broken2It is filled with explosive cartridge, passes through electrode and heating element heater during work by CO2Heating makes
Its pressure increases to a certain degree, thus breaks through explosive cartridge end shear dish, makes rapid expanding of being heated
CO2Discharged by the valve of explosive cartridge end, provide aerodynamic force and thrust for explosion matter, will be by
Quick-fried object distending.Shao Peng (1997) gypsum and stone make the square test block of varying strength, chi
Very little for 200mm × 200mm × 200mm, put into explosive cartridge.By high pressure N2Inject explosive cartridge, due to
The sealing function of explosion diaphragm, makes high pressure N2It is temporarily stored in explosive cartridge.Along with N2Pressure is not
Breaking and increase, the pressure on explosion diaphragm reaches to be torn during Rupture of Membrane pressure, high pressure N2Will be by tearing
Hole discharges rapidly and acts on by quick-fried medium, makes medium produce broken.Finally give Rupture of Membrane pressure with
The relation curve of the strength of materials, the rupture of membranes along with the increase of medium tensile strength, required for crushing medium
Pressure is non-linear growth.Du Yukun etc. (2012) have carried out supercritical CO2Jet breaks rock test and grinds
Studying carefully, supercritical carbon dioxide fluid has close to liquid high-density with close to the characteristic of gas low-viscosity,
Surface tension is little, thus has preferably flowing, infiltration and mass-transfer performance.Confirm supercritical CO2
Can effectively reduce brokenly rock threshold pressure, large volume crushes to cause rock to occur.
Above-mentioned gases at high pressure (N2Or CO2) broken rock device utilizes gases at high pressure (N the most cleverly2
Or CO2) physical property carried out Test And Research Work, and achieve preferable effect.But by
In the explosion of big power, experiment safety is relatively low.
Summary of the invention
It is an object of the invention to provide a kind of rock type materials cracking properties pilot system and method, should
Scheme abandons traditional uniformity and successional it is assumed that the internal non-homogeneous isobaric loading of sample, logical
Cross change gas pressure and sample constraint type, it is thus achieved that the initial rupture state of rock, state of rupture
The multinomial rock behavio(u)r indexs such as dimensional effect and tension shearing strength.
In order to achieve the above object, the concrete technical scheme of the present invention is as follows:
A kind of rock type materials cracking properties pilot system, including: high-pressure solid testing position, high pressure gas supply
System, depressurized system, data collecting system；
Described high-pressure solid testing position is steel tubular structure, and radially inside is provided with a circular baffle plate,
Its inside division is two parts by described circular baffle plate；The side face of described circular baffle plate and described high-pressure solid
Being provided with gap between the inwall of testing position, described interstitial site is provided with prevention rock material particle by simultaneously
The filter screen passed through for gases at high pressure.
Described high-potting storehouse is provided with air admission hole, pressure sensor installing hole and acceleration transducer peace
Dress hole, described high pressure gas feed system is connected with described air admission hole by pipeline；Passed by described pressure
Sensor installing hole and acceleration transducer installing hole, the induction end being respectively provided with described pressure sensor is stretched
Entering in described high-potting storehouse, its sensor ends is connected with described data collecting system；Described acceleration passes
Pasting in the induction end of sensor stretches into described high-pressure solid testing position and with rock material, its other end is with described
Data collecting system connects.The port of export of described gases at high pressure accumulation chamber is communicated with one funnel shaped
One flange, one end that on described first flange, bore is less is that gases at high pressure highlight hole, with described first
Flange is provided with and communicated with second flange equal with described prominent hole internal diameter, described first flange and described
Second flange is connected by sealing flange；Described depressurized system is located on described second flange, and described
The other end of two flanges is provided with noise reduction noise silencer；
Described data collecting system is at the beginning of according to the initial pressure in high-pressure solid testing position and rock material
Beginning state and performance parameter, with obtain pressure parameter, acceleration parameter and broken after material state
And performance parameter is analyzed the breakage properties obtaining rock material.
Further, described depressurized system is magnetic valve or double aluminium sheet burst disk；
During for magnetic valve, described magnetic valve is located between described second flange and described sealing flange, and
And be interconnected；
Described pair of aluminium sheet burst disk includes two aluminium sheet burst disk, during for double aluminium sheet burst disk, therein
One described aluminium sheet burst disk is located at described aspis position, and therein another is located at described second method
Between blue and described noise reduction noise silencer.
Further, described aluminium sheet burst disk be thickness be the aluminium sheet of 1.8-2.4mm, its center
It is provided with the cross recess reducing described aluminium sheet burst disk rigidity, a length of 10cm of described cross recessed, width
Degree is 0.1-0.5mm for 2mm, the degree of depth.
Further, described acceleration transducer installing hole is NPT installing hole.
Further, the outlet port of described high pressure gas feed system is provided with for regulating admission pressure
Pressure-reducing valve；The air inlet position of described high-pressure solid testing position is provided with Pressure gauge and valve.
Further, initial pressure and rock material in described data collecting system includes high-pressure solid testing position
The data acquisition unit of original state parameter, the CT of acquisition rock material initial rupture state parameter sweep
Imaging apparatus, the rock material broken state of rock material breaking size statistical analysis after off-test is surveyed
Amount device.
Present invention also offers a kind of rock type materials cracking properties test method, comprise the following steps:
A. the rock material of different-diameter is put into described high-pressure solid testing position, is supplied by described high pressure gas
In it, gases at high pressure it are filled with so that described gases at high pressure pass through the hole in rock material, split to system
Gap penetrates into inside described rock material；
B. when after the high pressure predetermined value that the pressure in described high-pressure solid testing position reaches stable, unloaded by described
Pressure system moment release so that the rock material containing gases at high pressure produces broken under bigger barometric gradient
Split fragmentation；
The most described data collecting system obtain the initial parameter of rock material and rupture after parameter, obtain
Obtain rock material permeability and then determine the overall connected ratio within rock material；
Described CT scan device is used to obtain the crack within rock material after crushing, distribution of pores
And number parameter；
By crack, distribution of pores and number parameter within the overall connected ratio obtained and rock material,
Obtain crack in conjunction with described material broken state measurement apparatus analysis and overall connected ratio is contributed by hole
Ratio.
Further, described gases at high pressure are high pressure nitrogen.
Further, described rock material is the solids replacement of cement mortar temporarily, by by mass ratio
For the cement of 1:3 and mortar mixture pour respectively in a diameter of 25mm, 50mm, 75mm,
In the pvc pipe of 110mm, and put into described high-pressure solid testing position, obtain after 7 days until mortar hardening.
A kind of rock type materials cracking properties pilot system of present invention offer and method, utilize high pressure gas
Body loads in the hole, crack of sample, makes sample crush by " quickly " unloading.Sample is inserted height
In pressure vessel, in container, inject gas, when gas penetrates into sample and reaches stable high pressure predetermined value
After, quickly discharging gas in container, sample ruptures under the pressure effect of hole crack, fragmentation.Change
Gas pressure and sample constraint type, it is possible to obtain the initial rupture state of rock material, state of rupture
Dimensional effect and the multinomial rock material characteristic index such as tension shearing strength.
This experimental provision crushes aspect at rock material and is different from and utilizes gases at high pressure (N2Or CO2) prominent
Going out to act on the rock material caused on rock material to crush, this method is by high pressure N2Injection holds
Have inside the high-pressure bottle of rock material so that it is joint or micro-crack by rock material itself are penetrated into
Inside it, then by unexpected pressure release, make to produce under bigger barometric gradient containing high pressure gas rock material
Life ruptures fragmentation.Certainly, if this device is improved, set up pressure and temperature control wherein
Device, it is possible to use supercritical CO2Test.
The device that the present invention provides, simple in construction, lower cost.In detection method, relatively conventional measurement
Method for testing abandons uniformity and continuity hypothesis, and load mode is that the uniform equipressure of material internal adds
Carry, by changing gas pressure and sample constraint type, it is possible to obtain the initial rupture state of rock,
The multinomial rock material characteristic index such as the dimensional effect of state of rupture and tension shearing strength.
Accompanying drawing explanation
A kind of rock type materials cracking properties test system architecture schematic diagram that Fig. 1 provides for the present invention；
The crack void ratio that Fig. 2 provides for the present invention and the relation curve of percentage of damage；
Fig. 3 is the view before the cement mortar solid of offer is broken in experimental example of the present invention；
Fig. 4 is the original state signal of cement mortar solid after the crushing experiment of offer in experimental example of the present invention
Figure；
Fig. 5 in experimental example of the present invention provide crushing experiment after cement mortar solid disturbed after shape
State schematic diagram；
1. high-potting storehouse, 2. high pressure gas feed system, 3. circular baffle plate, 4. filter screen, 5. air admission hole, 6.
Pressure sensor installing hole, 7. acceleration transducer installing hole, 8. pipeline, 9. data collecting system, 10.
First flange, 11. highlight hole, 12. second flanges, 13. sealing flanges, 14. noise reduction noise silencers, 15. pairs of aluminium
Plate burst disk.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the present invention are illustrated.
As it is shown in figure 1, a kind of rock type materials cracking properties pilot system, including: high-pressure solid testing position,
High pressure gas feed system, depressurized system, data collecting system；
Described high-pressure solid testing position is steel tubular structure, and radially inside is provided with a circular baffle plate,
Its inside division is two parts by described circular baffle plate；The side face of described circular baffle plate and described high-pressure solid
Being provided with gap between the inwall of testing position, described interstitial site is provided with prevention rock material particle by simultaneously
The filter screen passed through for gases at high pressure, this filter screen preferably employs high-strength tenacity filter screen.
Described high-pressure solid testing position is provided with air admission hole, pressure sensor installing hole and acceleration transducer peace
Dress hole, described high pressure gas feed system is connected with described air admission hole by pipeline；Passed by described pressure
Sensor installing hole and acceleration transducer installing hole, the induction end being respectively provided with described pressure sensor is stretched
Entering in described high-pressure solid testing position, its sensor ends is connected with described data collecting system；Described acceleration passes
Pasting in the induction end of sensor stretches into described high-pressure solid testing position and with rock material, its other end is with described
Data collecting system connects；The moment of release, the rock material in high-potting storehouse can rupture moment,
The most also it is to produce certain dynamic acceleration, and the acceleration transducer bonding with it in theory can
Record this acceleration.
The port of export of described high-pressure solid testing position is communicated with funnel shaped first flange, described first method
One end that on orchid, bore is less is that gases at high pressure highlight hole, is provided with and communicated with and institute with described first flange
State the second flange that prominent hole internal diameter is equal, described first flange and described second flange and pass through Sealing Method
Blue connection；Described depressurized system is located on described second flange, and the other end of described second flange is provided with
Noise reduction noise silencer；
Described data collecting system is at the beginning of according to the initial pressure in high-pressure solid testing position and rock material
Beginning state and performance parameter, with obtain pressure parameter, acceleration parameter and broken after material state
And performance parameter is analyzed the breakage properties obtaining rock material.
Preferably, described depressurized system is magnetic valve or double aluminium sheet burst disk；
During for magnetic valve, described magnetic valve is located between described second flange and described sealing flange, and
And be interconnected；
Described pair of aluminium sheet burst disk includes two aluminium sheet burst disk, during for double aluminium sheet burst disk, therein
One described aluminium sheet burst disk is located at described aspis position, and therein another is located at described second method
Between blue and described noise reduction noise silencer.
Set P1 and P2 and be respectively the blowing pressure between inner chamber the blowing pressure and two burst disk.False
If two set burst disk materials and physical dimension are completely the same, the broken plate pressure of burst disk (is assumed to be
8Mpa) the most stable.During pressurization can synchronous boost, as P1-P2 < 8Mpa and P2 < 8Mpa
Time, i.e. P1-8Mpa < P2 < 8Mpa, it is in stable state；As P1-P2 < 8Mpa and P2=8Mpa
Time, i.e. P1 < 16Mpa, and P2=8Mpa, outside aluminium sheet first destroys, and then, inner side aluminium sheet exists
Destroy under the conditions of the external and internal pressure difference of 16Mpa.Use double aluminium plate device, can break using
The relatively low condition (i.e. P2) of plate pressure completes higher inner chamber the blowing pressure (i.e. P1).
Preferably, described aluminium sheet burst disk be thickness be the aluminium sheet of 1.8-2.4mm, its center sets
There are the cross recess reducing described aluminium sheet burst disk rigidity, a length of 10cm of described cross recessed, width
It is 0.1-0.5mm for 2mm, the degree of depth.
Preferably, described acceleration transducer installing hole is NPT installing hole.
Preferably, the outlet port of described high pressure gas feed system is provided with for regulating subtracting of admission pressure
Pressure valve；The air inlet position of described high-pressure solid testing position is provided with Pressure gauge and valve.
Preferably, in described data collecting system includes high-pressure solid testing position at the beginning of initial pressure and rock material
The data acquisition unit of beginning state parameter, the CT of the initial rupture state parameter obtaining rock material sweep
Imaging apparatus, the rock material broken state of rock material breaking size statistical analysis after off-test is surveyed
Amount device.
The rock type materials cracking properties pilot system utilizing the present invention to provide carries out rock material characteristic
The method of test, comprises the following steps:
A. the rock material of different-diameter is put into described high-pressure solid testing position, is supplied by described high pressure gas
In it, gases at high pressure it are filled with so that described gases at high pressure pass through the hole in rock material, split to system
Gap penetrates into inside described rock material；
B. when after the high pressure predetermined value that the pressure in described high-pressure solid testing position reaches stable, unloaded by described
Pressure system moment release so that the rock material containing gases at high pressure produces broken under bigger barometric gradient
Split fragmentation；
The most described data collecting system obtain the initial parameter of rock material and rupture after gain of parameter
The permeability of rock material and then determine the overall connected ratio within rock material；
Described CT scan device is used to obtain the crack within rock material after crushing, distribution of pores
And number parameter；
By crack, distribution of pores and number parameter within the overall connected ratio obtained and rock material,
Crack and hole is obtained to overall connected ratio in conjunction with described rock material broken state measurement apparatus analysis
The ratio of contribution.
Concrete data analysis:
After experiment, data acquisition unit is according to the force value gathered and the original state parameter of rock
The permeability of rock material can be directly obtained, obtain permeability value and be assured that inside rock material
Overall connected ratio.
By CT scan device experiment, the fractured zones within rock material and quantity can be obtained,
I.e. initial rupture degree situation within rock material.
Crack and hole have contribution to rock material total interior connected ratio, obtain in conjunction with permeability test
Overall connected ratio and CT scan test obtain crack information, it is possible to obtain crack and hole are to always
The ratio of body connected ratio contribution.
Overall connected ratio is the biggest, and percentage of damage is the highest；Crack void ratio is the biggest, and percentage of damage is the lowest.
I.e. percentage of damage=f (overall connected ratio, crack void ratio)=f (permeability, initial rupture degree).
In test, when permeability and air pressure are certain, to percentage of damage and two parameters of crack void ratio
Demarcate, draw the relation curve of crack void ratio and percentage of damage, as shown in Figure 2.
By Fig. 2 it will be seen that crack void ratio is the biggest, percentage of damage is the lowest.
For a new sillar, first measure its permeability, carry out the internal loading of gases at high pressure the most again
And quick relief test, obtain percentage of damage.Search corresponding permeability and the calibration curve of test air pressure,
The percentage of damage obtained according to test, i.e. can determine that fissure hole gap ratio.
Experimental example:
Said apparatus is utilized to carry out cement mortar fast cracking properties test method as follows:
Cement that mass ratio is 1:3 and mortar are poured respectively in diameter 25mm, 50mm, 75mm,
In the pvc pipe of 110mm, each diameter includes multiple sample, at least makes two groups of samples, often groups
Including 7, the sample of different-diameter, one group of selected sample is put into high-pressure solid testing position, treats mortar
Air test is started after hardening 7 days.
The gases at high pressure used are N2,High pressure N2The initial pressure of gas tank is 13Mpa, the most initially
Pressure is set as 12-15Mpa, at high pressure N2The gas outlet configuration pressure-reducing valve of gas tank, is used for regulating examination
Admission pressure during testing；The air inlet position of high-pressure solid testing position installs Pressure gauge and valve, real-time monitored
Pressure within high-pressure bottle, can change N in process of the test simultaneously2Use during gas cylinder.
Setting the blowing pressure as 3.5-4.5MPa, the blowing pressures setting two groups of tests in this experimental example are divided
Wei 3.6MPa and 4.0MPa.Reach steady when the gas in high-pressure solid testing position penetrates into sample pressure simultaneously
After fixed high pressure predetermined value, quickly discharging gas in container, sample is broken under the pressure effect of hole crack
Split, fragmentation.In this test, the pressure relief device of use be thickness be double aluminium sheet burst disk of 2mm,
Its center is provided with the cross recess reducing described aluminium sheet burst disk rigidity, and described cross recessed is a length of
10cm, width are 2mm, the degree of depth is 0.1-0.5mm.
The contrast that result of the test is affected by the different parameters cross recess in table 1 burst disk
Wherein, the broken thickness of rock material refers to when pressurizeing insufficient, it is possible to rock material
Material cannot be the most broken, can only be even that surface portion crushes, and can not crushing of centre, real
Test result badly.In this experimental example, often in 7 samples of group, maximum sample thickness is 10cm, often
Individual sample all can be the most broken, and experimental result is preferable.
From the experimental data of above-mentioned table 1 it can be seen that the effect of depth of cross cutting breaks plate pressure, enter
And affect the effect that sample is broken.And, bear pressure the highest, broken effect is the best.
It it is the cement bonded sand of each size before crushing experiment from Fig. 3 to Fig. 5 it will be seen that in Fig. 3
The complete design sketch of slurry solid block；After Fig. 4 is crushing experiment, initially opens high-pressure solid testing position and see
The broken state of cement mortar；Fig. 5 be will broken in Fig. 4 after cement mortar disturbance after see
Broken state figure.That is, although the crushing effect of the cement mortar after crushing at first view in Fig. 4 is not
Substantially, but after disturbance from Fig. 5 it will be clear that the system provided by the present invention and
Method, carries out crushing effect to cement mortar solid block good.
Above, although illustrate several embodiments of the invention, but these embodiments are intended only as
Example proposes, and is not intended to limit the scope of the present invention.For the embodiment that these are new, it is possible to
Other various modes are implemented, in the range of without departing from idea of the invention, it is possible to carry out various province
Slightly, displacement and change.These embodiments and its deformation, be contained in scope and spirit of the present invention
While, also it is contained in the invention described in claims and equivalency range thereof.
Claims (9)
1. a rock type materials cracking properties pilot system, it is characterised in that including: High-Voltage Experimentation
Storehouse, high pressure gas feed system, depressurized system, data collecting system；Described high-pressure solid testing position is steel
Tubular structure, radially inside is provided with a circular baffle plate, and described circular baffle plate is by its inside division
For two parts；It is provided with gap between side face and the inwall of described high-pressure solid testing position of described circular baffle plate,
Described interstitial site is provided with and stops rock material particle by the filter screen passed through for gases at high pressure simultaneously；
Described high-pressure solid testing position is provided with air admission hole, pressure sensor installing hole and acceleration transducer peace
Dress hole, described high pressure gas feed system is connected with described air admission hole by pipeline；Passed by described pressure
Sensor installing hole and acceleration transducer installing hole, the induction end being respectively provided with described pressure sensor is stretched
Entering in described high-pressure solid testing position, its sensor ends is connected with described data collecting system；Described acceleration passes
Pasting in the induction end of sensor stretches into described high-pressure solid testing position and with rock material, its other end is with described
Data collecting system connects；
The port of export of described high-pressure solid testing position is communicated with funnel shaped first flange, described first method
One end that on orchid, bore is less is that gases at high pressure highlight hole, is provided with and communicated with and institute with described first flange
State the second flange that prominent hole internal diameter is equal, described first flange and described second flange and pass through Sealing Method
Blue connection；Described depressurized system is located on described second flange, and the other end of described second flange is provided with
Noise reduction noise silencer；
Described data collecting system is at the beginning of according to the initial pressure in high-pressure solid testing position and rock material
Beginning state and performance parameter, with obtain pressure parameter, acceleration parameter and broken after material state
And performance parameter is analyzed the breakage properties obtaining rock material.
A kind of rock type materials cracking properties pilot system the most according to claim 1, its feature exists
In, described depressurized system is magnetic valve or double aluminium sheet burst disk；
During for magnetic valve, described magnetic valve is located between described second flange and described sealing flange, and
And be interconnected；
Described pair of aluminium sheet burst disk includes two aluminium sheet burst disk, during for double aluminium sheet burst disk, therein
One described aluminium sheet burst disk is located at described aspis position, and therein another is located at described second method
Between blue and described noise reduction noise silencer.
A kind of rock type materials cracking properties pilot system the most according to claim 2, its feature
Be, described aluminium sheet burst disk be thickness be the aluminium sheet of 1.8-2.4mm, its center is provided with reduction
The cross recess of described aluminium sheet burst disk rigidity, a length of 10cm of described cross recessed, width be 2mm,
The degree of depth is 0.1-0.5mm.
A kind of rock type materials cracking properties pilot system the most according to claim 2, its feature
Being, described acceleration transducer installing hole is NPT installing hole.
A kind of rock type materials cracking properties pilot system the most according to claim 1, its feature
Being, the outlet port of described high pressure gas feed system is provided with the pressure-reducing valve for regulating admission pressure；
The air inlet position of described high-pressure solid testing position is provided with Pressure gauge and valve.
A kind of rock type materials cracking properties pilot system the most according to claim 1, its feature
Being, described data collecting system includes initial pressure and rock material original state in high-pressure solid testing position
The data acquisition unit of parameter, obtain the initial rupture state parameter of rock material CT scan device,
To the material broken state measurement apparatus of rock material breaking size statistical analysis after off-test.
7. utilize a kind of rock type materials cracking properties pilot system described in any one of claim 1-6
Carry out rock type materials characteristic test method, it is characterised in that comprise the following steps:
A. the rock material of different-diameter is put into described high-pressure solid testing position, is supplied by described high pressure gas
In it, gases at high pressure it are filled with so that described gases at high pressure are by the hole of rock material, crack to system
Penetrate into inside described rock material；
B. when after the high pressure predetermined value that the pressure in described high-pressure solid testing position reaches stable, unloaded by described
Pressure system moment release so that the rock material containing gases at high pressure produces broken under bigger barometric gradient
Split fragmentation；
The most described data collecting system obtain the initial parameter of rock material and rupture after parameter, obtain
Obtain the permeability of rock material, and then determine the overall connected ratio within rock material；
Described CT scan device is used to obtain the crack within rock material after crushing, distribution of pores
And number parameter；
By crack, distribution of pores and number parameter within the overall connected ratio obtained and rock material,
Crack and hole is obtained to overall connected ratio in conjunction with described rock material broken state measurement apparatus analysis
The ratio of contribution.
Test method the most according to claim 7, it is characterised in that described gases at high pressure are high
Pressure nitrogen.
Test method the most according to claim 7, it is characterised in that described rock material is water
Cement mortar, by the cement mortar mixture that mass ratio is 1:3 is poured respectively in a diameter of 25mm,
In the pvc pipe of 50mm, 75mm, 110mm, and put into described high-pressure solid testing position, treat mortar
Obtain after hardening 7 days.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107101676A (en) * | 2017-06-29 | 2017-08-29 | 湖北三江航天江河化工科技有限公司 | A kind of mine carbon dioxide demolition set test system |
| CN110095346A (en) * | 2019-04-25 | 2019-08-06 | 太原理工大学 | The experimental rig and test method of the rock failure mechanism of rock under high pore pressure and stress wave compound action |
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| CN110487683A (en) * | 2019-08-14 | 2019-11-22 | 四川大学 | Rock explosion crushing efficiency evaluation method based on grain shape |
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