CN104614249A - Pressure chamber testing device and testing method for monitoring rock breaking multivariate precursory information - Google Patents
Pressure chamber testing device and testing method for monitoring rock breaking multivariate precursory information Download PDFInfo
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- CN104614249A CN104614249A CN201510036171.4A CN201510036171A CN104614249A CN 104614249 A CN104614249 A CN 104614249A CN 201510036171 A CN201510036171 A CN 201510036171A CN 104614249 A CN104614249 A CN 104614249A
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Abstract
The invention discloses a pressure chamber testing device and testing method for monitoring rock breaking multivariate precursory information. The pressure chamber testing device includes a pressure chamber designed for anti-seepage sealing, wherein the pressure chamber is connected with an upper pressure plate tension transfer column system; a sample and a monitoring element are arranged inside the pressure chamber; the monitoring element is connected with data acquisition equipment outside the pressure chamber; the sample inside the pressure chamber is connected with the upper pressure plate tension transfer column system; the upper pressure plate tension transfer column system is connected with a header of the pressure chamber; a water pressing pipe is connected with the bottom of the sample; a base is arranged at the bottom of the pressure chamber; a confining pressure water inlet pipeline is arranged inside the base, and is communicated to the chamber body of the pressure chamber. According to the invention, the pressure chamber can be tested inside the chamber under the combined action of the confining pressure and water pressure on rock, so that the whole rock breaking process is visualized; besides, an osmotic pressure sensor, an acoustic emission sensor and an electrical resistivity sensor are all arranged on the sample to monitor the evolution law of breaking precursory information of rock under the action of the water pressure and the confining pressure, as a result, the rock breaking multivariate precursory information can be monitored under the action of water pressure.
Description
Technical field
The present invention relates to a kind of shop experiment pressure chamber arrangement, especially a kind of pressure chamber's test unit for monitoring the polynary precursor information of the rock failure mechanism of rock under hydraulic pressure effect.
Background technology
Along with the develop rapidly of China's tunnels and underground engineering, the scale of tunnels and underground engineering constantly expands, and buried depth constantly increases, and increasing engineering transfers to Southwestern Karst Mountain Area.Affect by body of groundwater and karst, generation gushing water mud accident of dashing forward in tunnel constantly increases, and thus causes a large amount of casualties and property loss.A large amount of Engineering Projects shows, dash forward at gushing water and to be bound to show before the geologic hazard such as mud occurs various different precursor information, by to the accurate seizure of precursor information and identification, the Evolution of abundant grasp precursor information, effectively can forecast the generation of disaster, avoid casualties and property loss.Wherein, be occur in research engineering prominent gush disaster and provide fundamental basis by the study on monitoring of shop experiment to the polynary precursor information of the rock failure mechanism of rock under hydraulic pressure effect.
Shop experiment carries out the effective means of testing that becomes more meticulous, and by being badly in need of key issue and the theory hypothesis of solution in research Practical Project, the Evolution obtaining research object intension carrys out guiding construction.Traditional rock failure mechanism of rock information monitoring is difficult to meet the research requirement of engineering project under complex geological condition, and monitoring project is single, cannot realize single shaft, three axle (σ simultaneously
2=σ
3) stress; Meanwhile, non-study of rocks occurs to destroy the precursor information discharged under by high-ground stress and high hydraulic pressure double action; Lack the accurate test to sample inside osmotic pressure.
Summary of the invention
The object of the invention is for overcoming above-mentioned the deficiencies in the prior art, provide the pressure chamber arrangement of the polynary precursor information monitoring of the rock failure mechanism of rock under hydraulic pressure effect shop experiment, this device integrates acoustic emission, resistivity and osmotic pressure monitoring and shortens test period, strengthens the accuracy of data acquisition in process of the test; Meet sample at single shaft and three axle (σ simultaneously
2=σ
3) experimental study under stress condition; Devise the size of sample being applicable to this pilot pressure chamber, be conducive to building water under high pressure to the effect of rock sample; Sample achieves sample and confined pressure water, pressure chamber and extraneous sealing, real simulation overall process of the rock failure mechanism of rock under the effect of water pressure of bottom.
For achieving the above object, the present invention adopts following technical proposals:
Pressure chamber's test unit of the polynary precursor information of the monitoring rock failure mechanism of rock, comprise pressure chamber, pressure chamber carries out fluid proof seal design; Described pressure chamber is connected with upper platen force-transmitting pole system, sample and monitoring element is provided with in described pressure chamber, the data collection facility of described monitoring element Bonding pressure outdoor, sample in described pressure chamber connects with upper platen force-transmitting pole system, described upper platen force-transmitting pole system is connected with the top cover of pressure chamber, and junction is provided with seal element; The bottom of described sample is connected with pressure pipe, and junction is provided with seal element; Be pedestal bottom described pressure chamber, be provided with confined pressure water water inlet pipe in described pedestal and be communicated to room, pressure chamber body, the opposite side of described pedestal is provided with Data Collection hole, and described monitoring element carries out collection and the analysis of Information Monitoring by Data Collection hole.
Described pressure chamber is transparent pressure room, is made up of tempered glass materials, and thickness is 20mm, and strength and stiffness are comparatively large, transparent visual.
The top cover of described pressure chamber and pedestal are provided with groove and carry out being engaged with the room body of pressure chamber and splice, and groove stitching position arranges high-strength and waterproofing stickum, enhances the sealing of pressure chamber.
Described sample is the bottom hole of right cylinder, sample, and the size of boring is different, simulates the rupture event of rock sample under the effect of different injection amount with this, gathers rock sample under different injection amount condition and to break many field information.
Described monitoring element comprises calibrate AE sensor, resistivity sensor and osmotic pressure sensor, and described calibrate AE sensor and resistivity sensor are arranged on sample sidewall, and carries out waterproof anti-explosion measure; Described osmotic pressure sensor is located at the inside of sample.
Described osmotic pressure sensor adopts miniature osmotic pressure sensor, ensures the structural intergrity of rock sample.
Described Data Collection hole place adopts high-strength and waterproofing stickum bonding, seals.
Described sample outer wall is enclosed with heat-shrink tube, infiltrates with this isolated confined pressure medium, affect test effect.
The top of described pressure chamber is provided with vent valve.Vent valve is carrying out three axle (σ
2=σ
3) drain air in pressure chamber before test, close vent valve when carrying out triaxial test.
Utilize pressure chamber's test unit to test, comprise the following steps:
Step 1: first carry out laying of sample, a small amount of butter is smeared in sample top and bottom, to reduce end friction;
Step 2: monitoring element is laid, and from Data Collection hole, data line is drawn, then adopt high-strength and waterproofing glass cement bonding, seal;
Step 3: by pressure chamber's top cover through upper platen force-transmitting pole system, lay transparent pressure room along the groove of pressure chamber's top cover and the groove of pedestal, and adopt high-strength and waterproofing glass cement bonding;
Step 4: the installation finally completing shop experiment pressure chamber, has access to pressure pipe and gos deep into sample inside, lays confined pressure water water inlet pipe in base interior.
When carrying out uniaxial test, in described step 4, confined pressure water water inlet pipe is in closed condition.
When carrying out triaxial test, in described step 4, open confined pressure water water inlet pipe, the confined pressure σ of structure sample
2=σ
3.
Pressure chamber of the present invention test unit can realize single shaft and three axle (σ
2=σ
3) test, closing confined pressure water inlet opening in uniaxial test process, there is not the confined pressure effect of water in sample.Three axle (σ
2=σ
3) confined pressure water under condition, retain the water inlet pipe of confined pressure water at pedestal place, water inlet pipe and pedestal adopt high-strength and waterproofing glass cement to carry out fluid proof seal process.
Pressure chamber of the present invention test unit solves the problem of rock shop experiment pressure chamber under confined pressure and hydraulic pressure acting in conjunction, achieves the visual of rock failure mechanism of rock overall process.Be laid on sample by osmotic pressure, acoustic emission and resistivity sensor, monitoring rock destroys the Evolution of precursor information under hydraulic pressure and confined pressure effect, achieves the monitoring of the polynary precursor information of the rock failure mechanism of rock under hydraulic pressure effect simultaneously.Process of the test is more genuine and believable, test findings and Practical Project more close.Have the following advantages:
1, pressure chamber selects the transparent material of high strength, can strengthen test process visual, realizes the observation directly perceived of process of the test, is conducive to the accuracy improving process of the test, the degree of accuracy of warranty test result;
2, pressure chamber's tempered glass materials of selecting rigidity larger, adopts high-strength and waterproofing glass cement bonding, can ensure the sealing of pressure chamber;
3, the multiple waterproof sealing means of pilot system appropriate design, according to device performance, give full play to the advantage of various waterproof material at different parts; Especially according to seal request, devise the slipper seal method being applied to repeatedly telescopic location, the sealing of pressure chamber's use procedure can be ensured;
4, adopt high-strength and waterproofing glass cement bonding, sealed in mounted inlet opening and Data Collection hole, materials are simple, method is practical, reduce production cost.
5, the structure of whole pressure chamber is clear, and total quality is comparatively light, the difficulty of the equipment that decreases in moving process.
Accompanying drawing explanation
Fig. 1 is the structural representation of pressure chamber of the present invention experimental provision;
Fig. 2 is the longitudinal profile schematic diagram of sample;
The schematic cross section of Fig. 3 a to be xsect be sample of 10mm × 10mm;
The schematic cross section of Fig. 3 b to be xsect be sample of 10mm × 15mm;
The schematic cross section of Fig. 3 c to be xsect be sample of 10mm × 20mm;
In figure, 1. go up platen force-transmitting pole system; 2. vent valve; 3.O RunddichtringO; 4. pressure chamber's top cover; 5. tempered glass; 6. osmotic pressure sensor; 7. resistivity sensor; 8. calibrate AE sensor; 9. pressure water pipe; 10. confined pressure water inlet opening; 11. Data Collection holes; 12. pressure chamber's bottom base; 13. heat-shrink tubes; A is sample.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, for monitoring pressure chamber's test unit of the polynary precursor information of the rock failure mechanism of rock under hydraulic pressure effect, comprise transparent pressure chamber, pressure chamber comprises pressure chamber's top cover 4, tempered glass 5, pedestal 12, and pressure chamber adopts high-strength and waterproofing glass cement bonding; Upper platen 1 is connected with pressure chamber's top cover 4, and the two adopts O RunddichtringO to carry out sliding sealing process; Upper platen 1 connects with Sample A, and Sample A top and bottom smears part butter; The bottom of Sample A adopts O RunddichtringO to seal, and prevent pressure water seepage, confined pressure water enters pressure chamber by confined pressure water inlet opening 10; Calibrate AE sensor 8, resistivity sensor 7 and osmotic pressure sensor 6 are deployed in Sample A respectively, and precursor information image data line connects external unit by Data Collection hole 11; Pressure water pipe 9 connects the joint at pedestal 12 place, provides water under high pressure.Sample closes confined pressure water inlet opening 10 when carrying out uniaxial compression test, carries out three axle (σ
2=σ
3) test time, Sample A adopt heat-shrink tube 13 carry out waterproof, open vent valve 2 during water filling, when filling close vent valve 2.Osmotic pressure sensor 6, resistivity sensor 7, calibrate AE sensor 8 adopt respectively imbeds and glues glutinous mode, is laid in Sample A.
Transparent pressure room, adopt tempered glass materials to make, thickness is 20mm, and strength and stiffness are comparatively large, transparent visual.
As shown in Fig. 2-Fig. 3 c, sample is right cylinder, is of a size of Φ 50mm × 100mm, bottom hole, hole depth 60mm, and cross-sectional area (the long and wide) size in hole is divided into 10mm × 10mm, 10mm × 15mm, 10mm × 20mm.
When carrying out uniaxial compression test, first carry out laying of sample, a small amount of butter is smeared in sample top and bottom, to reduce end friction, monitoring element is laid by testing requirements, and from Data Collection hole, data line is drawn, then adopt high-strength and waterproofing glass cement bonding, seal; Through platen on force-transmitting pole, lay transparent pressure room along groove, and adopt high-strength and waterproofing glass cement bonding, finally complete the installation of shop experiment pressure chamber, have access to pressure pipe and go deep into sample inside, confined pressure water water inlet pipe is in closed condition simultaneously.Three axle (σ
2=σ
3) test and only need access confined pressure water, open the water inlet pipe of confined pressure water, the confined pressure (σ of structure sample
2=σ
3).
By reference to the accompanying drawings the specific embodiment of the present invention is described although above-mentioned; but not limiting the scope of the invention; one of ordinary skill in the art should be understood that; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection scope of the present invention.
Claims (10)
1. monitor pressure chamber's test unit of the polynary precursor information of the rock failure mechanism of rock, it is characterized in that, comprise pressure chamber, pressure chamber carries out fluid proof seal design; Described pressure chamber is connected with upper platen force-transmitting pole system, sample and monitoring element is provided with in described pressure chamber, the data collection facility of described monitoring element Bonding pressure outdoor, sample in described pressure chamber connects with upper platen force-transmitting pole system, described upper platen force-transmitting pole system is connected with the top cover of pressure chamber, and junction is provided with seal element; The bottom of described sample is connected with pressure pipe, and junction is provided with seal element; Be pedestal bottom described pressure chamber, be provided with confined pressure water inlet channel in described pedestal and be communicated to room, pressure chamber body, the opposite side of described pedestal is provided with Data Collection hole, and described monitoring element carries out collection and the analysis of Information Monitoring by Data Collection hole.
2. pressure chamber as claimed in claim 1 test unit, it is characterized in that, described pressure chamber is transparent pressure room, is made up of tempered glass materials.
3. pressure chamber as claimed in claim 1 test unit, is characterized in that, the top cover of described pressure chamber and pedestal are provided with groove and carry out being engaged with the room body of pressure chamber and splice, and groove stitching position arranges high-strength and waterproofing stickum.
4. pressure chamber as claimed in claim 1 test unit, it is characterized in that, described sample is the bottom hole of right cylinder, sample, and the size of boring is different.
5. pressure chamber as claimed in claim 1 test unit, it is characterized in that, described monitoring element comprises calibrate AE sensor, resistivity sensor and osmotic pressure sensor, and described calibrate AE sensor and resistivity sensor are arranged on sample sidewall; Described osmotic pressure sensor is located at the inside of sample.
6. pressure chamber as claimed in claim 1 test unit, is characterized in that, described Data Collection hole place adopts high-strength and waterproofing stickum bonding.
7. pressure chamber as claimed in claim 1 test unit, is characterized in that, described sample outer wall is enclosed with heat-shrink tube.
8. pressure chamber as claimed in claim 1 test unit, it is characterized in that, the top of described pressure chamber is provided with vent valve.
9., based on the experimental technique of pressure chamber according to claim 1 test unit, comprise the following steps:
Step 1: first carry out laying of sample, a small amount of butter is smeared in sample top and bottom, to reduce end friction;
Step 2: monitoring element is laid, and from Data Collection hole, data line is drawn, then adopt high-strength and waterproofing glass cement bonding, seal;
Step 3: by pressure chamber's top cover through upper platen force-transmitting pole system, lay transparent pressure room along the groove of pressure chamber's top cover and the groove of pedestal, and adopt high-strength and waterproofing glass cement bonding;
Step 4: the installation finally completing shop experiment pressure chamber, has access to pressure pipe and gos deep into sample inside, lays confined pressure water water inlet pipe in base interior.
10. the experimental technique of pressure chamber as claimed in claim 9 test unit, when carrying out uniaxial test, in described step 4, confined pressure water water inlet pipe is in closed condition; When carrying out triaxial test, in described step 4, open confined pressure water water inlet pipe, the confined pressure σ of structure sample
2=σ
3.
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| CN104614249B CN104614249B (en) | 2017-05-10 |
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Cited By (11)
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|---|---|---|---|---|
| CN104977234A (en) * | 2015-06-23 | 2015-10-14 | 安徽理工大学 | Pressure rock failure and instability process and dynamic permeability test apparatus and method thereof |
| CN105973712A (en) * | 2015-12-21 | 2016-09-28 | 河南理工大学 | Acoustic emission testing device used in gassy coal rock fracturing process |
| CN105974056A (en) * | 2016-04-30 | 2016-09-28 | 山东大学 | Tunnel water bursting disaster precursor information monitoring model test system and test method thereof |
| CN106289585A (en) * | 2015-05-19 | 2017-01-04 | 中国石油大学(华东) | A kind of Visco elastic strain surveys the measuring method of the test device of on-the-spot crustal stress |
| GB2543535A (en) * | 2015-10-21 | 2017-04-26 | Rolls Royce Plc | Test methods and apparatus |
| CN108169028A (en) * | 2018-01-29 | 2018-06-15 | 武汉龙澄环境装备有限公司 | Container water test unit |
| CN108398342A (en) * | 2018-02-28 | 2018-08-14 | 华东交通大学 | The acoustic emission test device and its operating method of a kind of rock mass in high confining pressure unloading |
| CN109374499A (en) * | 2018-11-12 | 2019-02-22 | 华侨大学 | A kind of rock seepage pressure room of receivable acoustic emission signal |
| CN109613119A (en) * | 2019-01-11 | 2019-04-12 | 山东科技大学 | A kind of acoustic-electric seeps quasi- triaxial cell and the test method of comprehensive monitoring |
| CN109708975A (en) * | 2019-01-24 | 2019-05-03 | 河南城建学院 | Antinoise interference type uniaxial loading sample cylinder and its application method |
| CN113607541A (en) * | 2021-08-12 | 2021-11-05 | 重庆大学 | Visual survey device of rock mechanics experiment |
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Cited By (16)
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|---|---|---|---|---|
| CN106289585A (en) * | 2015-05-19 | 2017-01-04 | 中国石油大学(华东) | A kind of Visco elastic strain surveys the measuring method of the test device of on-the-spot crustal stress |
| CN106289585B (en) * | 2015-05-19 | 2019-04-09 | 中国石油大学(华东) | A kind of measurement method of the test device of the live crustal stress of Visco elastic strain survey |
| CN104977234B (en) * | 2015-06-23 | 2018-02-27 | 安徽理工大学 | Pressure-bearing rock failure mechanism of rock Instability and dynamic permeability characteristic test device and method |
| CN104977234A (en) * | 2015-06-23 | 2015-10-14 | 安徽理工大学 | Pressure rock failure and instability process and dynamic permeability test apparatus and method thereof |
| GB2543535A (en) * | 2015-10-21 | 2017-04-26 | Rolls Royce Plc | Test methods and apparatus |
| CN105973712A (en) * | 2015-12-21 | 2016-09-28 | 河南理工大学 | Acoustic emission testing device used in gassy coal rock fracturing process |
| CN105974056A (en) * | 2016-04-30 | 2016-09-28 | 山东大学 | Tunnel water bursting disaster precursor information monitoring model test system and test method thereof |
| CN105974056B (en) * | 2016-04-30 | 2019-03-26 | 山东大学 | Tunnel water bursting disaster precursor information monitoring model pilot system and test method |
| CN108169028A (en) * | 2018-01-29 | 2018-06-15 | 武汉龙澄环境装备有限公司 | Container water test unit |
| CN108398342B (en) * | 2018-02-28 | 2020-05-12 | 华东交通大学 | Acoustic emission testing device for rock mass in high confining pressure unloading and operation method thereof |
| CN108398342A (en) * | 2018-02-28 | 2018-08-14 | 华东交通大学 | The acoustic emission test device and its operating method of a kind of rock mass in high confining pressure unloading |
| CN109374499A (en) * | 2018-11-12 | 2019-02-22 | 华侨大学 | A kind of rock seepage pressure room of receivable acoustic emission signal |
| CN109613119A (en) * | 2019-01-11 | 2019-04-12 | 山东科技大学 | A kind of acoustic-electric seeps quasi- triaxial cell and the test method of comprehensive monitoring |
| CN109708975A (en) * | 2019-01-24 | 2019-05-03 | 河南城建学院 | Antinoise interference type uniaxial loading sample cylinder and its application method |
| CN109708975B (en) * | 2019-01-24 | 2021-07-30 | 河南城建学院 | Anti-noise interference type single-shaft loading sample cylinder and using method thereof |
| CN113607541A (en) * | 2021-08-12 | 2021-11-05 | 重庆大学 | Visual survey device of rock mechanics experiment |
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Inventor after: Lin Chunjin Inventor after: Yuan Yongcai Inventor after: Li Liping Inventor after: Shi Shaoshuai Inventor after: Yang Weimin Inventor after: Zhang Qianqing Inventor after: Zhou Zongqing Inventor after: Xu Zhenhao Inventor after: Wang Sheng Inventor before: Li Shucai Inventor before: Yuan Yongcai Inventor before: Li Liping Inventor before: Shi Shaoshuai Inventor before: Yang Weimin Inventor before: Zhang Qianqing Inventor before: Zhou Zongqing Inventor before: Xu Zhenhao Inventor before: Wang Sheng |
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