CN109323925A - A kind of method and system for testing name consolidation pressure mud shale early period - Google Patents
A kind of method and system for testing name consolidation pressure mud shale early period Download PDFInfo
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- CN109323925A CN109323925A CN201811116507.8A CN201811116507A CN109323925A CN 109323925 A CN109323925 A CN 109323925A CN 201811116507 A CN201811116507 A CN 201811116507A CN 109323925 A CN109323925 A CN 109323925A
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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
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
Abstract
The present invention relates to the method and system fields of test name consolidation pressure mud shale early period, a kind of method and system for testing name consolidation pressure mud shale early period are disclosed, by measuring the lateral strain of pressure calibrating device and the proportionality coefficient of lateral pressure；The lateral strain that axial compressive force acquires the corresponding mud shale sample to be tested of axially different pressure is applied to the mud shale sample to be tested in progressive mode by axial compressive force loading device；The lateral strain of mud shale sample to be tested is converted into lateral pressure, and fits the axially different pressure of the mud shale sample to be tested and the relation curve of different lateral pressures；The axially different pressure of the mud shale sample to be tested and the first inflection point of the relation curve of different lateral pressures are calculated, using the axial compressive force value of the ordinate of first inflection point as name consolidation pressure early period of the mud shale sample to be tested.The present invention can bear biggish load, and effect is better than triaxial test.
Description
Technical field
The invention belongs to rock mechanics experiment technical fields, are related to a kind of side for testing name consolidation pressure mud shale early period
Method and system.
Background technique
Form the sedimentary rock of one of earth's lithosphere main rock as three kinds, earth earth's surface accounting has 70%, contained
Mineral products also account for as many as 80% of whole world ore reserves, it is consolidated Rock-forming Mechanism and mechanical characteristic research be can not
Or lack.Sedimentary rock was precipitated by deposit before this during consolidating diagenesis, and after through overlying sediments object compression, dewatering and coagulating,
It is formed again through diagenesis.Research argillaceous rocks evolution performance and it is crisp-prolong in conversion process, R.Nygard etc. by early period name
Clay rock, mud shale are studied in adopted consolidation pressure introducing, are commented for quantitative study argillaceous caprock closure dynamic evolution
Valence proposes OCR method, and points out that name consolidation pressure early period and OCR are the important indicators for evaluating this rocks cap rock.And in order to
It determines OCR value, is that how to obtain name consolidation pressure early period from key from the point of view of the formula of OCR below.
In formula, PcFor name consolidation pressure early period；σ′voFor the currently active consolidation pressure.
Argillaceous rocks is further studied,Deng finding its of name consolidation pressure not only by due to ground early period
Mechanical loading caused by the erosion (lifting) and deposition of layer and unloading influence, also with diagenesis, the change of cementing, mineralogical composition and
The effect of the geologic-tectonic evolutions such as long-term secondary consolidation compression (i.e. creep) is related.The claystone weaker for part diagenesis,
Mud shale etc., due to being influenced by aging, cementing, mineralogical composition conversion with factors such as variations in its diagenesis middle and advanced stage,
Overconsolidation can be shown, the appearance of overconsolidation can generally make rock show hard crisp feature, and then may integrally tie to it
The leakproofness of structure adversely affects, therefore name consolidation pressure early period just becomes an important finger for judging cap rock leakproofness
Mark.Rock cap rock blocks construction as covering on oil gas, is that oil-gas reservoir is able to the essential condition to be formed and be saved, sealing performance is excellent
Bad is to determine oil-gas reservoir abundance, reserves and the key factor of holding time.It can be seen that important as related rock cap rock is evaluated
Name consolidation pressure early period of index becomes more and more important with the research and extension meaning of OCR method, this is also rock mechanics reason
The embodiment constantly combined by research and engineer application.
Although the theory and engineering in argillaceous rocks research mid-early stage name consolidation pressure act on increasingly prominent, its detection side
Method rare people research also lacks accurately and reliably experimental provision and detects.However name early period of the soil body consolidates pressure in soil mechanics
One of an important factor for power is as the engineering properties for influencing soil, either still has emphasis in theory teaching in experimental teaching
It introduces, measuring method also gradually mature.In the prior art, mainly there are Casa Grande (Casagrande) method, Bomi
The methods of Si Te (Burmister) method, Xi Moteman (J.H.Schmertmann) method and Japanese three Li Shi methods, it is domestic at present each
Testing regulations is still based on Casa Grande (Casagrande) method.Casa Grande (Casagrande) method, that is, soil test
The consolidation test method for the measurement soil that specification uses, major experimental instrument is compression concretion instrument, its main feature is that finding on curve
Then minimum profile curvature radius point makees horizontal line, the angular bisector of tangent line and two lines, angular bisector and straight line elongated segment on this aspect
Pressure at right angle corresponding to the intersection point of line is preconsolidation pressure.This method is intuitively simple, it can be readily appreciated that still for argillaceous rocks
For, soil mechanics testing equipment load capability is limited, is not directly applicable in Rock Mechanics Test, is especially a lack of related mark
It more can not operational issue when theoretical value and equipment of the quasi- rock sample under lateral confined condition.
Summary of the invention
The present invention provides a kind of method and system for testing name consolidation pressure mud shale early period, solves mud in the prior art
In matter rock name early period consolidation pressure continuous mode, soil mechanics testing equipment load capability is limited, is not directly applicable rock
In experiment of machanics, can not more it be operated when being especially a lack of theoretical value and equipment of the relevant criterion rock sample under lateral confined condition
The technical issues of.
The purpose of the present invention is what is be achieved through the following technical solutions:
A method of test name consolidation pressure mud shale early period, comprising:
Measure the lateral strain of pressure calibrating device and the proportionality coefficient of lateral pressure；
Sidewise restraint sleeve is made using the pressure calibrating device；
Mud shale sample to be tested is packed into sidewise restraint sleeve；
Axial compressive force is applied to the mud shale sample to be tested in progressive mode by axial compressive force loading device, and is led to
Cross the lateral strain that resistance-strain device acquires the corresponding mud shale sample to be tested of axially different pressure；
According to the proportionality coefficient of lateral strain and lateral pressure, the lateral strain of mud shale sample to be tested is converted to laterally
Pressure, and fit the axially different pressure of the mud shale sample to be tested and the relation curve of different lateral pressures；
The axially different pressure of the mud shale sample to be tested is calculated to turn from the first of the relation curve of different lateral pressures
The axial compressive force value of the ordinate of first inflection point is consolidated pressure by point
Power.
A kind of system for testing name consolidation pressure mud shale early period, including medium carbon steel cylindrical drum, sidewise restraint sleeve, liquid
Press pump, resistance strain gauge, three-axis tester, wherein
The diameter of the internal diameter of the medium carbon steel cylindrical drum and the mud shale sample to be tested, the length of cylindrical drum are greater than described
The height of mud shale sample to be tested, cylindrical drum end are sealed using disk extrusion brass gasket ring, and by drawing between disk
Threaded rod applies pressure, and wherein one end is equipped with gas vent and pressurization hole, and gas vent and pressurization hole are all made of screw plug sealing；Institute
At the quartering for stating medium carbon steel cylindrical drum, circumferentially paste respectively by 4 foil gauges, the foil gauge and resistance strain gauge connect
It connects, the pressurization hole is connect with the hydraulic pump, for measuring the lateral strain of pressure calibrating device and the ratio of lateral pressure
Coefficient；
The three-axis tester includes driving mechanism, control mechanism, measuring mechanism, pressure head and bearing base；
The sidewise restraint sleeve is cut by the medium carbon steel cylindrical drum, and is remained in the medium carbon steel cylindrical drum
Foil gauge, for placing mud shale sample to be tested, the foil gauge is connect with resistance strain gauge at middle part, bottom placement with it is described
On the bearing base of three-axis tester, top is contacted with the pressure head of the three-axis tester.
The present invention provides a kind of method and system for testing name consolidation pressure mud shale early period, by measuring pressure calibration
The lateral strain of device and the proportionality coefficient of lateral pressure；Sidewise restraint sleeve is made using the pressure calibrating device；To side
Mud shale sample to be tested is packed into constraint sleeve；The mud shale is waited in progressive mode by axial compressive force loading device
Test specimens apply axial compressive force, and the side of the corresponding mud shale sample to be tested of axially different pressure is acquired by resistance-strain device
To strain；According to the proportionality coefficient of lateral strain and lateral pressure, the lateral strain of mud shale sample to be tested is converted to laterally
Pressure, and fit the axially different pressure of the mud shale sample to be tested and the relation curve of different lateral pressures；Calculate institute
The axially different pressure of mud shale sample to be tested and the first inflection point of the relation curve of different lateral pressures are stated, described first is turned
Early period name consolidation pressure of the axial compressive force value of the ordinate of point as the mud shale sample to be tested.The present invention can bear compared with
Big load；It is converted into stress by strain, coefficient of horizontal pressure of the sample under different stress can be calculated well, passed through
Heavy wall constrains the transversely deforming of sample during test, is equivalent to and is applied with surrounding pressure, and with the increase of deformation and
Increase, this is unable to reach in ordinary triaxial test.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is a kind of method flow diagram of test mud shale name early period consolidation pressure of the embodiment of the present invention；
Fig. 2 is pressure-strain variation curve synoptic diagram of the embodiment of the present invention；
Fig. 3 is lateral stress-axial stress curve synoptic diagram of the embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the medium carbon steel cylindrical drum of the embodiment of the present invention；
Fig. 5 is the schematic diagram of the section structure of the medium carbon steel cylindrical drum of the embodiment of the present invention；
Fig. 6 is the structural schematic diagram of the circular opening clamping plate 4 of the medium carbon steel cylindrical drum of the embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the round clamping plate 8 of the medium carbon steel cylindrical drum of the embodiment of the present invention；
Fig. 8 is the structural schematic diagram of the cyclic annular clamping plate 3 of the medium carbon steel cylindrical drum of the embodiment of the present invention；
Fig. 9 is the structural schematic diagram of the three-axis tester of the medium carbon steel cylindrical drum of the embodiment of the present invention；
It is attached marked in the figure: 1 cylindrical sleeves, 2 threaded rods, 3 cyclic annular clamping plates, 4 circular opening clamping plates, 5 gas vents, 6 pressurization holes,
7 nuts, 8 round clamping plates, 9 short thread bars, 10 gasket rings, 11 pressure heads, 12 sidewise restraint sleeves, 13 bearing bases, 15 mud pages
Rock sample to be tested, 16 tapped through holes.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
The embodiment of the invention provides a kind of methods for testing name consolidation pressure mud shale early period, as shown in Figure 1, packet
It includes:
Step 101, measure pressure calibrating device lateral strain and lateral pressure proportionality coefficient；
Wherein, step 101 can specifically include:
Step 101-1, medium carbon steel is processed into cylindrical drum as pressure calibrating device；
Wherein, pressure calibrating device is the cylindrical pressure caliberating device of both ends sealing, as shown in Fig. 4 to Fig. 8, cylindrical pressure
Caliberating device includes cylindrical sleeves 1, long threaded rod 2, cyclic annular clamping plate 3, circular opening clamping plate 4, gas vent 5, hole 6 of pressurizeing, nut
7, round clamping plate 8, short thread bar 9, gasket ring 10, connection type is that annular clamping plate 3 is clamped into set on 1 both ends of cylindrical sleeves,
Tapped through hole 16 is passed through by threaded rod 2 to be connected and fixed；It is gasket ring 10 on the outside of annular clamping plate 3, is on the outside of gasket ring 10
Circular opening clamping plate 4 (1 one end of cylindrical sleeves) and round clamping plate 8 (1 other end of cylindrical sleeves), are passed through by three with short thread bar 9
Cyclic annular clamping plate 3 and circular opening clamping plate 4 (or round clamping plate 8), and it is tight with 7 bolt of nut, and thus extruding gasket ring 10 carries out close
Envelope；Three root long threaded rods 2 pass through cyclic annular clamping plate 3 and circular opening clamping plate 4 (or round clamping plate 8), and tight with 7 bolt of nut, to mention
It high sealing effect and forms it into unified whole；Cyclic annular clamping plate 3, circular opening clamping plate 4, the outer diameter of round clamping plate 8 are all the same；Ring
Shape clamping plate 3, circular opening clamping plate 4, the internal diameter of round clamping plate 8 are identical as 1 diameter of cylindrical sleeves；Cyclic annular clamping plate 3, circular opening folder
Plate 4, round clamping plate 8 reserve 6 ducts along edge equalization, to penetrate long threaded rod 2；Wherein 4 central part of circular opening clamping plate
Position is reserved a pressurization hole 6 and a gas vent 5, a pressurization hole 6 and a gas vent 5 and can be sealed by plug, circle
The length of column sleeve cylinder 1 is greater than the height of cylindrical mud shale sample to be tested.
Step 101-2, at the quartering of the cylindrical drum, 4 foil gauges are circumferentially pasted respectively；
Wherein, amount to 12 foil gauges to connect with strain acquirement instrument respectively.
Step 101-3, the cylindrical drum is erect and is placed, open pressurization hole and gas vent, injected by pressurization hole hydraulic
Oil until hydraulic oil stops after overflowing in gas vent, and hydraulic pump is connected with the pressurization hole of cylindrical drum, closes gas vent；
Wherein, hydraulic pump is connect by hole of pressurizeing with pressure calibrating device, closes gas vent (with blocking after filling hydraulic oil
Block) start to apply pressure.
Step 101-4, the cylindrical drum is horizontally arranged, foil gauge is connect with strain acquirement instrument, laterally to be pressed
Power calibration applies the every 20MPa of pressure by hydraulic pump and carries out primary calibration i.e. record prexxure of the hydraulic pump value and strain value, until
320MPa；
It wherein, is the accuracy for improving measurement, pressure is kept for 1 minute from 0-300MPa, every increase 20MPa, passes through strain
Acquisition Instrument reads strain value corresponding to every group of pressure, obtains the relationship between pressure and strain value.
Step 101-5, according to the prexxure of the hydraulic pump value and strain value demarcated, it is fitted the variation relation curve of the two, and
Proportionality coefficient of the calculated relationship slope of a curve as lateral strain and lateral pressure.
Wherein, the prexxure of the hydraulic pump value of calibration and the relation curve of strain value fitting are as shown in Figure 1, example is fitted as shown in figure 1
It is 0.169 that graph gradient, which is pressure coefficient, out.
Step 102 makes sidewise restraint sleeve using the pressure calibrating device；
Wherein, the one of 10cm identical or big with the height of the mud shale sample to be tested is cut into the middle part of the cylindrical drum
Duan Zuowei sidewise restraint sleeve, its inner wall need to be polished flat, and allow tolerance 0.02mm.
Step 103 is packed into mud shale sample to be tested into sidewise restraint sleeve；
Wherein, mud shale sample to be tested internal diameter is close with constraint mold internal diameter, and needs to be in close contact with mould inner wall；Mud page
It rock sample to be tested upper and lower end face must be horizontal.
Step 104 applies axially the mud shale sample to be tested in progressive mode by axial compressive force loading device
Pressure, and acquire by resistance-strain device the lateral strain of the corresponding mud shale sample to be tested of axially different pressure；
Wherein, it opens the load of axial compressive force loading device and uses displacement control mode, loading speed 0.06mm/min is adjusted
Whole parameter, and deformeter acquisition synchronous must be carried out with the load of power.
Step 105, according to the proportionality coefficient of lateral strain and lateral pressure, the lateral strain of mud shale sample to be tested is turned
It is changed to lateral pressure, and the axially different pressure for fitting the mud shale sample to be tested is bent from the relationship of different lateral pressures
Line；
Wherein, when the strain value of a certain channel acquisition of resistance-strain device reaches 1800 (corresponding pressure value is 300MPa)
When, it can stop testing.
Step 106, the axially different pressure for calculating the mud shale sample to be tested and the relation curve of different lateral pressures
The first inflection point, using the axial compressive force value of the ordinate of first inflection point as the mud shale sample to be tested early period name
Consolidation pressure.
Wherein, the axially different pressure of the mud shale sample to be tested and the relation curve of different lateral pressures are fitted i.e.
Lateral stress-axial stress curve is as shown in Fig. 2, calculate the first inflection point of Fig. 2 relation curve, the ordinate of first inflection point
Early period name consolidation pressure of the axial compressive force value 112MPa as the mud shale sample to be tested.
May include: between step 103 and step 104
Foil gauge on sidewise restraint sleeve is connected into resistance-strain device by 1/4 bridge, parameter is set, and is debugged
Normally；
Sidewise restraint sleeve is leveled with horizontal tube, device is moved into triaxial cell, to reduce bias to test
Influence, need first to be leveled with horizontal tube centralising device before load, and preload sample, observation deformeter acquired
Data whether there is negative value (indicate device tension), such as there is negative value, then need to unload, adjustment setting position carries out pre-add again
It carries, until data are all positive value.
The present invention provides a kind of method for testing name consolidation pressure mud shale early period, passes through measurement pressure calibrating device
The proportionality coefficient of lateral strain and lateral pressure；Sidewise restraint sleeve is made using the pressure calibrating device；To sidewise restraint
Mud shale sample to be tested is packed into sleeve；By axial compressive force loading device in progressive mode to the mud shale sample to be tested
Apply axial compressive force, and laterally answering for the corresponding mud shale sample to be tested of axially different pressure is acquired by resistance-strain device
Become；According to the proportionality coefficient of lateral strain and lateral pressure, the lateral strain of mud shale sample to be tested is converted into lateral pressure,
And fit the axially different pressure of the mud shale sample to be tested and the relation curve of different lateral pressures；Calculate the mud page
First inflection point of the axially different pressure of rock sample to be tested and the relation curve of different lateral pressures, by the vertical of first inflection point
Early period name consolidation pressure of the axial compressive force value of coordinate as the mud shale sample to be tested.The present invention can bear biggish lotus
It carries；It is converted into stress by strain, coefficient of horizontal pressure of the sample under different stress can be calculated well, pass through heavy wall pair
The transversely deforming of sample is constrained during test, is equivalent to and is applied with surrounding pressure, and is increased with the increase of deformation, this
It is to be unable to reach in ordinary triaxial test.
A kind of system for testing name consolidation pressure mud shale early period is additionally provided in the embodiment of the present invention, as shown in figure 9,
Including middle sidewise restraint sleeve 12, hydraulic pump 17, resistance strain gauge 18, three-axis tester 19, wherein
The length of the diameter of the internal diameter of the sidewise restraint sleeve 12 and the mud shale sample to be tested, cylindrical drum is greater than institute
State the height of mud shale sample to be tested, cylindrical drum end is sealed using disk extrusion brass gasket ring, and between disk by pair
Internal thread broaching bar applies pressure, and wherein one end is equipped with gas vent and pressurization hole, and gas vent and pressurization hole are all made of screw plug sealing；
At the quartering of the medium carbon steel cylindrical drum, circumferentially paste respectively by 4 foil gauges, the foil gauge and resistance strain gauge connect
It connects, the pressurization hole is connect with the hydraulic pump, for measuring the lateral strain of pressure calibrating device and the ratio of lateral pressure
Coefficient；
The three-axis tester includes driving mechanism, control mechanism, measuring mechanism, pressure head and bearing base；
The sidewise restraint sleeve 12 is cut by the medium carbon steel cylindrical drum, and remains with the medium carbon steel cylindrical drum
On foil gauge, for placing mud shale sample to be tested 15, the foil gauge connect with resistance strain gauge at middle part, bottom placement and
On the bearing base 13 of the three-axis tester, top is contacted with the pressure head of the three-axis tester.
Wherein, bearing base 13 and pressure head are in " convex " type, set the gas vent of diameter 1mm in middle part；Convex portion diameter omits
Less than constraint mold internal diameter；Bearing base 13 and pressure head 11 need to be quenched, to improve compression strength.
This system further includes computing module, including calibrated and calculated unit and solution computing unit, wherein
Calibrated and calculated unit, for acquiring oil pressure and the corresponding lateral strain of resistance strain gauge of hydraulic pump generation；According to
The oil pressure and lateral strain that hydraulic pump generates, are fitted the variation relation curve of the two, and calculated relationship slope of a curve is as side
To the proportionality coefficient of strain and lateral pressure；
Computing unit is solved, for acquiring axially different pressure and the corresponding side of resistance strain gauge of the three-axis tester
To strain；According to the proportionality coefficient of lateral strain and lateral pressure, the lateral strain of mud shale sample to be tested is converted to laterally
Pressure, and fit the axially different pressure of the mud shale sample to be tested and the relation curve of different lateral pressures；Calculate institute
The axially different pressure of mud shale sample to be tested and the first inflection point of the relation curve of different lateral pressures are stated, described first is turned
Early period name consolidation pressure of the axial compressive force value of the ordinate of point as the mud shale sample to be tested.
The present invention is described in detail above, specific case used herein is to the principle of the present invention and embodiment party
Formula is expounded, and the above description of the embodiment is only used to help understand the method for the present invention and its core ideas；Meanwhile it is right
In those of ordinary skill in the art, according to the thought of the present invention, change is had in specific embodiments and applications
Place, in conclusion the contents of this specification are not to be construed as limiting the invention.
Claims (6)
1. a kind of method for testing name consolidation pressure mud shale early period characterized by comprising
Measure the lateral strain of pressure calibrating device and the proportionality coefficient of lateral pressure；
Sidewise restraint sleeve is made using the pressure calibrating device；
Mud shale sample to be tested is packed into sidewise restraint sleeve；
Axial compressive force is applied to the mud shale sample to be tested in progressive mode by axial compressive force loading device, and passes through electricity
Resistance strain device acquires the lateral strain of the corresponding mud shale sample to be tested of axially different pressure；
According to the proportionality coefficient of lateral strain and lateral pressure, the lateral strain of mud shale sample to be tested is converted into lateral pressure
Power, and fit the axially different pressure of the mud shale sample to be tested and the relation curve of different lateral pressures；
The axially different pressure of the mud shale sample to be tested and the first inflection point of the relation curve of different lateral pressures are calculated, it will
Early period name consolidation pressure of the axial compressive force value of the ordinate of first inflection point as the mud shale sample to be tested.
2. the method for test name consolidation pressure mud shale early period according to claim 1, which is characterized in that the measurement
The step of proportionality coefficient of the lateral strain of pressure calibrating device and lateral pressure, comprising:
Medium carbon steel is processed into cylindrical drum as pressure calibrating device, wherein the internal diameter of cylindrical drum and the mud shale are to be tested
The diameter of sample, the length of cylindrical drum are greater than the height of the mud shale sample to be tested, and cylindrical drum end is squeezed yellow using disk
Copper packing ring is sealed, and by applying pressure to internal thread broaching bar between disk, wherein gas vent and pressurization hole, two holes are reserved in one end
It is all made of screw plug sealing；
At the quartering of the cylindrical drum, 4 foil gauges are circumferentially pasted respectively；
The cylindrical drum is erect and is placed, pressurization hole and gas vent is opened, hydraulic oil is injected by pressurization hole, until hydraulic oil from
Stop after being overflowed in gas vent, and hydraulic pump is connected with the pressurization hole of cylindrical drum, closes gas vent；
The cylindrical drum is horizontally arranged, foil gauge is connect with strain acquirement instrument, to carry out lateral pressure calibration, by hydraulic
Pump applies the every 20MPa of pressure and carries out primary calibration i.e. record prexxure of the hydraulic pump value and strain value, until 320MPa；
According to the prexxure of the hydraulic pump value and strain value demarcated, the variation relation curve both being fitted, and calculated relationship curve
Proportionality coefficient of the slope as lateral strain and lateral pressure.
3. the method for test name consolidation pressure mud shale early period according to claim 2, which is characterized in that the utilization
The pressure calibrating device makes sidewise restraint sleeve, comprising:
It is cut into one section identical with the height of the mud shale sample to be tested in the middle part of the cylindrical drum and is used as sidewise restraint set
Cylinder.
4. the method for test name consolidation pressure mud shale early period according to claim 3, which is characterized in that step is to side
It is packed into after mud shale sample to be tested into constraint sleeve, comprising:
Foil gauge on sidewise restraint sleeve is connected into resistance-strain device by 1/4 bridge, parameter is set, and is debugged just
Often；
Sidewise restraint sleeve is leveled with horizontal tube.
5. a kind of system for testing name consolidation pressure mud shale early period, which is characterized in that including sidewise restraint sleeve, hydraulic
Pump, resistance strain gauge, three-axis tester, wherein
The length of the diameter of the internal diameter of the sidewise restraint sleeve and the mud shale sample to be tested, cylindrical drum is greater than the mud page
The height of rock sample to be tested, cylindrical drum end are sealed using disk extrusion brass gasket ring, and by internal thread broaching between disk
Bar applies pressure, and wherein one end is equipped with gas vent and pressurization hole, and gas vent and pressurization hole are all made of screw plug sealing；In described
At the quartering of carbon steel cylindrical drum, circumferentially paste respectively by 4 foil gauges, the foil gauge is connect with resistance strain gauge, institute
It states pressurization hole to connect with the hydraulic pump, for measuring the lateral strain of pressure calibrating device and the proportionality coefficient of lateral pressure；
The three-axis tester includes driving mechanism, control mechanism, measuring mechanism, pressure head and bearing base；
The sidewise restraint sleeve is cut by the medium carbon steel cylindrical drum, and remains with answering in the medium carbon steel cylindrical drum
Become piece, for placing mud shale sample to be tested, the foil gauge is connect with resistance strain gauge at middle part, and bottom is placed and three axis
On the bearing base of testing machine, top is contacted with the pressure head of the three-axis tester.
6. the system of test name consolidation pressure mud shale early period according to claim 5, which is characterized in that further include meter
Calculate module, including calibrated and calculated unit and solution computing unit, wherein
Calibrated and calculated unit, for acquiring oil pressure and the corresponding lateral strain of resistance strain gauge of hydraulic pump generation；According to hydraulic
The oil pressure generated and lateral strain are pumped, is fitted the variation relation curve of the two, and calculated relationship slope of a curve is used as and laterally answers
Become the proportionality coefficient with lateral pressure；
Computing unit is solved, the axially different pressure and resistance strain gauge for acquiring the three-axis tester are corresponding laterally to answer
Become；According to the proportionality coefficient of lateral strain and lateral pressure, the lateral strain of mud shale sample to be tested is converted into lateral pressure,
And fit the axially different pressure of the mud shale sample to be tested and the relation curve of different lateral pressures；Calculate the mud page
First inflection point of the axially different pressure of rock sample to be tested and the relation curve of different lateral pressures, by the vertical of first inflection point
Early period name consolidation pressure of the axial compressive force value of coordinate as the mud shale sample to be tested.
Priority Applications (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111189702A (en) * | 2020-01-10 | 2020-05-22 | 甘肃省地震局（中国地震局兰州地震研究所） | Device for researching clay characteristics by using static triaxial electrical method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181934A (en) * | 2015-09-17 | 2015-12-23 | 中国矿业大学 | Method for estimating soft soil consolidation coefficient based on one-dimensional equal strain and stress relaxation tests |
| CN107478507A (en) * | 2016-06-08 | 2017-12-15 | 中国石油化工股份有限公司 | A kind of crisp intermediate zone of prolonging of mud shale determines method |
-
2018
- 2018-09-25 CN CN201811116507.8A patent/CN109323925A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105181934A (en) * | 2015-09-17 | 2015-12-23 | 中国矿业大学 | Method for estimating soft soil consolidation coefficient based on one-dimensional equal strain and stress relaxation tests |
| CN107478507A (en) * | 2016-06-08 | 2017-12-15 | 中国石油化工股份有限公司 | A kind of crisp intermediate zone of prolonging of mud shale determines method |
Non-Patent Citations (4)
| Title |
|---|
| 刘俊新等: "前期名义固结压力在岩石力学本科实验教学中的应用", 《实验科学与技术》 * |
| 刘俊新等: "泥质岩盖层前期名义固结压力及封闭特性研究", 《岩石力学与工程学报》 * |
| 刘俊新等: "泥页岩前期名义固结压力的层理效应研究", 《岩石力学与工程学报》 * |
| 陈西磊: "鄂西渝东泥页岩力学性能研究", 《万方学位论文库》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111189702A (en) * | 2020-01-10 | 2020-05-22 | 甘肃省地震局（中国地震局兰州地震研究所） | Device for researching clay characteristics by using static triaxial electrical method |
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