CN110296899A - The test method of unpowered stress locking study of rocks creep - Google Patents
The test method of unpowered stress locking study of rocks creep Download PDFInfo
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- CN110296899A CN110296899A CN201910625436.2A CN201910625436A CN110296899A CN 110296899 A CN110296899 A CN 110296899A CN 201910625436 A CN201910625436 A CN 201910625436A CN 110296899 A CN110296899 A CN 110296899A
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- hole
- stress
- swelling agent
- rock
- creep
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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
- G01N3/18—Performing tests at high or low temperatures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0071—Creep
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—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
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/027—Specimens with holes or notches
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of test method of unpowered stress locking study of rocks creep, pass through the directly aperture on test rock, experimental rig is installed in hole, by the swelling agent simulation loading power for filling different cooperation specifications around testing equipment in hole, and the flexible change micro-control stress of telescopic rod of compatibility test device, it obtains creep of rock data by the foil gauge of the pressure sensor and hole wall that are embedded in swelling agent to be studied again, the method is at low cost, simple to operate.
Description
Technical field
The invention belongs to rock stress studying technological domains, are related to a kind of examination of unpowered stress locking study of rocks creep
Proved recipe method.
Background technique
In mechanics of materials field, creep is solid material under conditions of keeping stress constant, strain extend at any time and
The phenomenon that increase.In the case where the long-term yield stress born lower than material creep may occur for solid material.By right
Material applies pressure, and over time, as the creep stage-in the case of be roughly divided into decaying, stabilization, accelerate three ranks
Section.And the creep of rock under energetic disturbance effect refers to that the stress state of country rock is in rock strength limit stress, country rock
Certain deformation of creep can be generated.At the same time, in the rock for the energetic disturbance load for occurring to happen suddenly random during creep
Creep.This random energetic disturbance effect can be such that the deformation of creep of country rock has a huge impact, currently, using gravitational load
Lotus amount cannot be very big, and hydraulic loaded is not easy to safeguard, operation is heavy, and stress locking experimentation cost is high.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of test sides of unpowered stress locking study of rocks creep
Method installs experimental rig using the directly aperture on test rock in hole, and the swelling agent simulation for filling different cooperations later adds
Power is carried, the telescopic rod of compatibility test device is flexible to change stress, obtains creep of rock data again by foil gauge and pressure sensor
It is studied, it is at low cost, it is simple to operate.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: a kind of unpowered stress locking research rock
The test method of stone creep, characterized in that it includes the following steps:
A kind of test method of unpowered stress locking study of rocks creep, characterized in that it includes the following steps:
Step 1, proportional spacing punching is carried out to rock, sundries in cleaning eye carries out hole number；
Step 1-1, in hole, axis direction placement pressure sensor and foil gauge, are close to hole sidewalls；
Step 1-2 cuts cuboid hole, and sundries in cleaning eye with water knife at the same distance of hole both sides；
Step 1-3 coats one layer of thermal insulating gel on metal heating plate surface, and metal heating plate is inserted into cuboid hole；
Step 1-4 fills gap between metal heating plate and rock with heat-insulated colloidal sol；
Step 2, experimental rig is placed in hole；
Step 2-1, operating operation test device extension and contraction control part operate telescopic rod, package unit are unfolded；
Step 2-2 inside close test device, prevents swelling agent from entering inside device；
Step 3, haydite layer is arranged；
Step 3-1 wraps up the haydite of same size with cloth；
Step 3-2, relative test device two sides are equidistant in hole is evenly arranged one layer of haydite layer；
Step 4: filling swelling agent；
Step 4-1: swelling agent is launched between experimental rig and hole wall；
Step 4-2: the water added stirs evenly, and swelling agent expansion is made to apply loading force to rock sample；
Step 4-3: the placement force sensor inside swelling agent；
Step 5: installation earth anchor；
Step 5-1: anchoring earth anchor；
Step 5-2: increase pressure sensor in anchor pole and pressing plate contact position；
Step 5-3: rockbolt stress provides stable vertical constraint；
Step 6, stress is adjusted；
Step 6-1, heats metal heating plate；
Step 6-2 unclamps experimental rig, by manual operation, recycles telescopic rod, gradually unloads swelling agent to the stress of rock sample.
A kind of test method of unpowered stress locking study of rocks creep, by directly test rock on aperture,
Experimental rig is installed in hole, by the way that the swelling agent simulation loading power of different cooperation specifications is filled around testing equipment in hole,
And the flexible change stress of telescopic rod of compatibility test device, pass through the foil gauge and pressure sensor being embedded in swelling agent and obtains
Creep of rock data are studied again, at low cost, simple to operate.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is test plan view of the invention.
Fig. 2 is the schematic diagram of internal structure in Fig. 1.
Fig. 3 is telescopic control device of the invention and telescopic rod schematic diagram
In figure: experimental rig 1, haydite layer 2, metal heating plate 3, swelling agent 4, earth anchor 5.
Specific embodiment
In Fig. 1 ~ Fig. 3, a kind of test method of unpowered stress locking study of rocks creep, characterized in that it includes
Following steps:
Step 1, rock is punched, sundries in cleaning eye；
Step 1-1, in hole, axis direction disposes foil gauge；
Step 1-2 cuts cuboid hole, and sundries in cleaning eye with water knife at the same distance of hole both sides；The step
Purpose is to place metal heating plate 3, and when operation heats metal heating plate, metal heating plate
Loading force is generated after expansion, it is at low cost, it is simple to operate.
Preferably, the size of cuboid hole can be determined according to sample rock and metal heating plate actual size.
Step 1-3 coats one layer of thermal insulating gel on 3 surface of metal heating plate, metal heating plate 3 is inserted into rectangular body opening
Gap；
Step 1-4 fills gap between metal heating plate and rock with heat-insulated colloidal sol；The purpose of the step is, by cuboid
It is tamped between gap and metal heating plate 3, loading force is conducted to sample rock rapidly after being conducive to metal heating plate expansion, is made
Obtaining stress can directly transmit, and the consumption for reducing energy increases the research precision of experiment.
Step 2, experimental rig 1 is placed in hole；
Step 2-1,1 extension and contraction control part of operating operation test device operate telescopic rod, package unit are unfolded；
Step 2-2 inside close test device, prevents swelling agent from entering inside device；
Step 3, haydite layer 2 is arranged；
Step 3-1 wraps up the haydite of same size with cloth；
Step 3-2,1 two sides of relative test device are equidistant in hole is evenly arranged one layer of haydite layer；The purpose of the step is,
The stress intensity that haydite layer can be born determines that size should can be provided with swelling agent according to the maximum stress of experiment swelling agent used
Maximum stress it is close, when swelling agent reaches maximum stress can pressure stabilizing, reduce the requirement that match to swelling agent, reduce experiment and grasps
The complexity of work；Control haydite is uniformly distributed the stress that can preferably control swelling agent offer, prevents stress distribution uneven.
Step 4: filling swelling agent；
Step 4-1: swelling agent is launched between experimental rig 1 and hole wall；
Step 4-2: the water added stirs evenly, and swelling agent expansion is made to apply loading force to rock sample；
Step 4-3: the placement force sensor inside swelling agent；The purpose of the step is to measure internal stress size.
Bulking agent levels table corresponding with swelling stress is as follows:
| Bulking agent levels | Expand steady pressure kg |
| 10% | 22.341 |
| 20% | 29.242 |
| 25% | 36.671 |
| 30% | 41.983 |
Step 5: installation earth anchor 5；
Step 5-1: anchoring earth anchor；The purpose of the step is to prevent experimental rig upward swelling stress produced by swelling agent from making
It is extruded failure with lower, while stable vertical constraint being provided.
Step 5-2: increase pressure sensor at anchor pole；The purpose of this step is that measurement swelling agent vertically expands and is provided
Maximum stress.
Step 5-3: rockbolt stress is subjected to displacement；The purpose of the step is to measure rock by foil gauge and pressure sensor
The deformation and displacement of the generation of stone creep, or utilize deformation caused by the creep of ultrasound examination sound emission study of rocks.
Step 6, stress is adjusted；
Step 6-1 heats metal heating plate 3；The purpose of the step is through the rising-heat contracting-cold of metal heating plate
Principle makes metal heating plate volume expansion generate extruding to rock, loads to a certain extent to rock, study of rocks exists
The situation of change of creep of rock under loading stress.
Step 6-2 unclamps experimental rig 1, by manual operation, recycles telescopic rod, gradually unloads swelling agent 4 to rock sample
Stress.The purpose of the step is the situation of change of study of rocks creep under the conditions of minimal stress removal.
In above-mentioned steps, used experimental provision 1, it includes four high-strength alloy plates by telescopic rod and stretches
Control device connection.The cuboid of a upper opening can be spliced into pedestal after telescopic rod is fully extended.High-strength alloy
Plate is unlikely to deform under swelling agent megapascal rank stress.High-strength alloy plate is divided into two kinds of A, B, and A class alloy sheets can be logical at both ends
It crosses manual operation and stretches out a sheet metal, the fluted sheet metal that can receive the stretching of A class fanning strip in B class fanning strip both sides is better
It links together.When not using device, telescopic rod can take in engine interior, and pedestal has sliding slot, convenient for recycling alloy sheets.?
When use cuboid can be formed by stretching out telescopic rod by machine drive under telescopic control device inner hub systemic effect
Profile, then operate A class alloy sheets sheet metal and be completely stitched together.The counter-force action system being made of earth anchor and pressing plate is installed,
Anti- locking apparatus is inflated agent and squeezes out, while the mount stress piece on counter-force action system, obtains stress value.To terminate experiment or
Change stress intensity, first recycle A class fanning strip both ends sheet metal, then contraction pole can be recycled and manufactured inside swelling agent and face sky
Face.Destruction without lateral confinement will finally occur for swelling agent.Certain proportion and certain volume can be added again with repetitive operation at this time
Swelling agent manufactures different stress, again stress locking.Stress section is housed, being coated with nano coating prevents on high-strength alloy plate
Swelling agent adhesion.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as limitation of the invention, this Shen
Please in embodiment and embodiment in feature in the absence of conflict, can mutual any combination.Protection model of the invention
The technical solution that should be recorded with claim is enclosed, the equivalent replacement side of technical characteristic in the technical solution recorded including claim
Case is protection scope.Equivalent replacement i.e. within this range is improved, also within protection scope of the present invention.
Claims (1)
1. a kind of test method of unpowered stress locking study of rocks creep, characterized in that it includes the following steps:
Step 1, proportional spacing punching is carried out to rock, sundries in cleaning eye carries out hole number；
Step 1-1, in hole, axis direction placement pressure sensor and foil gauge, are close to hole sidewalls；
Step 1-2 cuts cuboid hole, and sundries in cleaning eye with water knife at the same distance of hole both sides；
Step 1-3 coats one layer of thermal insulating gel on metal heating plate (3) surface, and metal heating plate (3) are inserted into rectangular body opening
Gap；
Step 1-4 fills gap between metal heating plate and rock with heat-insulated colloidal sol；
Step 2, experimental rig (1) is placed in hole；
Step 2-1, operating operation test device (1) extension and contraction control part operate telescopic rod, package unit are unfolded；
Step 2-2 inside close test device, prevents swelling agent from entering inside device；
Step 3, haydite layer (2) are arranged；
Step 3-1 wraps up the haydite of same size with cloth；
Step 3-2, relative test device (1) two sides are equidistant in hole is evenly arranged one layer of haydite layer；
Step 4: filling swelling agent；
Step 4-1: swelling agent is launched between experimental rig (1) and hole wall；
Step 4-2: the water added stirs evenly, and swelling agent expansion is made to apply loading force to rock sample；
Step 4-3: the placement force sensor inside swelling agent；
Step 5: installation earth anchor (5)；
Step 5-1: anchoring earth anchor；
Step 5-2: increase pressure sensor in anchor pole and pressing plate contact position；
Step 5-3: rockbolt stress provides stable vertical constraint；
Step 6, stress is adjusted；
Step 6-1 heats metal heating plate (3)；
Step 6-2 unclamps experimental rig (1), by manual operation, recycles telescopic rod, gradually unloads swelling agent (4) to rock sample
Stress.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910625436.2A CN110296899B (en) | 2019-07-11 | 2019-07-11 | Test method for researching rock creep by unpowered stress locking |
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|---|---|---|---|
| CN201910625436.2A CN110296899B (en) | 2019-07-11 | 2019-07-11 | Test method for researching rock creep by unpowered stress locking |
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| CN110296899A true CN110296899A (en) | 2019-10-01 |
| CN110296899B CN110296899B (en) | 2021-07-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735724A (en) * | 2020-06-23 | 2020-10-02 | 三峡大学 | Device and method for detecting creep stress of in-situ rock-soil body |
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| US4673218A (en) * | 1985-10-18 | 1987-06-16 | Okumura Corporation | Tunnel excavation method |
| CN203534910U (en) * | 2013-10-15 | 2014-04-09 | 合肥工业大学 | Triaxial creep testing device for stress, seepage and chemical coupling of rock |
| CN107462492A (en) * | 2017-07-17 | 2017-12-12 | 三峡大学 | The anchor rod anchored research method of large dosage swelling agent is carried out for CT scan technology |
| CN109030340A (en) * | 2018-07-16 | 2018-12-18 | 三峡大学 | A kind of self-expanding Load-unload device and method |
| CN109163985A (en) * | 2018-08-15 | 2019-01-08 | 三峡大学 | A kind of in-situ testing device and method of test rock sample shearing strength and long-term creep deformation |
| US20190048250A1 (en) * | 2016-02-11 | 2019-02-14 | Schlumberger Technology Corporation | Release of expansion agents for well cementing |
| CN109374409A (en) * | 2018-10-16 | 2019-02-22 | 三峡大学 | A kind of method of on-site rapid measurement crustal stress |
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2019
- 2019-07-11 CN CN201910625436.2A patent/CN110296899B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4673218A (en) * | 1985-10-18 | 1987-06-16 | Okumura Corporation | Tunnel excavation method |
| CN203534910U (en) * | 2013-10-15 | 2014-04-09 | 合肥工业大学 | Triaxial creep testing device for stress, seepage and chemical coupling of rock |
| US20190048250A1 (en) * | 2016-02-11 | 2019-02-14 | Schlumberger Technology Corporation | Release of expansion agents for well cementing |
| CN107462492A (en) * | 2017-07-17 | 2017-12-12 | 三峡大学 | The anchor rod anchored research method of large dosage swelling agent is carried out for CT scan technology |
| CN109030340A (en) * | 2018-07-16 | 2018-12-18 | 三峡大学 | A kind of self-expanding Load-unload device and method |
| CN109163985A (en) * | 2018-08-15 | 2019-01-08 | 三峡大学 | A kind of in-situ testing device and method of test rock sample shearing strength and long-term creep deformation |
| CN109374409A (en) * | 2018-10-16 | 2019-02-22 | 三峡大学 | A kind of method of on-site rapid measurement crustal stress |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111735724A (en) * | 2020-06-23 | 2020-10-02 | 三峡大学 | Device and method for detecting creep stress of in-situ rock-soil body |
| CN111735724B (en) * | 2020-06-23 | 2023-03-10 | 三峡大学 | Device and method for detecting creep stress of in-situ rock-soil body |
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| CN110296899B (en) | 2021-07-13 |
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Application publication date: 20191001 Assignee: Hongchuang (Yichang) Architectural Design Co.,Ltd. Assignor: CHINA THREE GORGES University Contract record no.: X2023980031470 Denomination of invention: Test method for studying rock creep without dynamic stress locking Granted publication date: 20210713 License type: Common License Record date: 20230116 |
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| EC01 | Cancellation of recordation of patent licensing contract | ||
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Assignee: Hongchuang (Yichang) Architectural Design Co.,Ltd. Assignor: CHINA THREE GORGES University Contract record no.: X2023980031470 Date of cancellation: 20230721 |