CN104931357A - Testing system and testing method for mechanical property of coal rock test piece - Google Patents
Testing system and testing method for mechanical property of coal rock test piece Download PDFInfo
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- CN104931357A CN104931357A CN201510428032.6A CN201510428032A CN104931357A CN 104931357 A CN104931357 A CN 104931357A CN 201510428032 A CN201510428032 A CN 201510428032A CN 104931357 A CN104931357 A CN 104931357A
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Abstract
The invention discloses a testing system and a testing method for mechanical property of a coal rock test piece. The testing system comprises traditional mechanical property testing, a medical image and rock breaking intelligent monitoring; the traditional mechanical property testing comprises a mechanical index testing system and a hydraulic control continuous loading system; the medical image comprises an X-optical mechanical scanning system and an enhancing image system; the rock breaking intelligent monitoring comprises a sound emitting monitoring system and a thermal infrared monitoring system. The testing method for the mechanical property of the coal rock test piece particularly comprises the following steps that 1 a mechanical test platform and DR/CR image equipment are started; 2 the coal rock test piece is placed on the carrying disc position of a mechanical test machine, and an AE sensor and the test piece are fixed; 3 a contrast agent is injected; 4 one-time DR/CR image scanning is conducted; 5 a mechanical property test is carried out on the coal rock test piece. The obtained image is clear in picture, the analysis carried out on the microscopic scale such as internal microcracks of the rock sample test piece is achieved, and the experimental data are more accurate.
Description
Technical field
The present invention relates to a kind of mechanical property testing system and method for testing thereof, specifically a kind of coal rock specimen mechanical property testing system and method for testing thereof.
Background technology
Rock sample test piece mechanical property testing studies the most basic method of rock body quality of mine stability problem.Rock body quality of mine generation yield failure is by the dynamic process under terrestrial stress and mining-induced stress acting in conjunction, carry out dynamic characteristic test parametric measurement and crack Dynamic Evolution Characteristics under drawing pressured state to collection rock sample test piece under laboratory condition, this has great importance for rock body quality of mine stability prediction.
Traditional material test specimen mechanical property testing only just carries out the determination (as compressive strength, shearing strength etc.) of basic mechanical parameter by pressure testing machine to rock sample test piece and obtains index of correlation feature (as acoustic emission, thermal infrared etc.) by intelligent Monitoring of rock mass stability technology.To test based on mechanics parameter as (2005) such as Tan Zhihong and Tang Chunan and in conjunction with Infrared Thermography Technology, surface temperature change in defect grouan destructive process be studied.Cai Meifeng (2003) utilizes acoustic emission monitor(ing) to combine with mechanical test method, has carried out parameter coupling analysis to concrete material.Along with the development of experimental monitoring technology, people enter the upsurge in damage field to Rock Slide Stability Journal of Sex Research, rock mass microscopic damage has become the focus of rock body quality of mine damage mechanics research to the impact of its macromechanics behavior, namely from the fractions distribution and the evolution Feature that gather study of various damage the meso-scales such as rock sample test piece internal tiny crack, cavity.In domestic and overseas correlative development, Nicoletta Fusi (2013) uses CT scan to disclose its internal crack three-dimensional spatial distribution feature after injecting liquid mercury to the carbonaceous rock salt test specimen of bottom outlet porosity; Suzanne Raynaud (2008) divides research its deformation process by carrying out uniaxial compression experiment to Beaucaire muddy limestone sample and carrying out CT scan; The Chinese Academy of Sciences Wang Yu and Li Xiao (2014) etc. is analyzed ground fracture water flow by CT method of testing; Ge Xiurun (2000) academician is studied microscopic damage propagation law in rock loading procedure by CT scan method, obtains the CT image suggested a new damage variable (the damage influence factor) based on CT number clearly of each stage in rock failure process (Micro-v oid is by densification → microcrack initiation → bifurcated → development → fracture → destruction → unloading).Method mentioned in these achievements in research is only just by the announcement of CT scan technology to rock sample internal crack dynamic evolution rule and the research of failure mechanism, and the expansion of coal petrography sample internal crack shows as breeding spatially and the extension of time, suppose can obtain the fractured zones scope of the visual and clear image of its internal crack under coal petrography sample loaded condition and polynary index parameter by special shadowgraph technique and polynary Monitoring Indexes technological means, this can be the similar aspect problems such as rock mass engineering project estimation of stability and provides reliable, the most most scientific theoretical direction.
Existing coal petrography sample mechanical property testing is only the acquisition of simply " stress-strain ", " stress-temperature ", " stress-damage " and " stress-AE-strains " coupled relation and index, backanalysis on displacements is carried out according to these parameters, fractal theory realizes coal and rock stability prediction, and often the error of calculation is comparatively large, data volume is large and computation process is comparatively loaded down with trivial details for these methods; Rely on single or multi objective parameter can not realize resolving the science of rock mass engineering project stability problem, the theory calculate of experimental data, intuitively image analysing computer and science becomes the important method and approach that realize coal and rock stability prediction accurately; Be only by CT scan technology and supporting independently mechanics test specimen weighted platform in existing coal and rock meso-damage characteristic research, and then realize the analysis on the meso-scales such as rock sample test piece internal tiny crack.Because CT scan equipment is to the limit of micro-crack recognition capability, lacks corresponding radiography and strengthen function, be therefore difficult to obtain imaged image comparatively clearly.
Summary of the invention
The object of the present invention is to provide a kind of coal rock specimen mechanical property testing system and method for testing thereof, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
A kind of coal rock specimen mechanical property testing system, comprise traditional mechanics characteristic test, medical image and rock burst intellectual monitoring, described traditional mechanics characteristic test comprises mechanical index test macro and the continuous loading system of hydrostatic control, described medical image comprises X-optical mechaical scanning system and strengthens image system, described rock burst intellectual monitoring comprises acoustic emission monitoring system and thermal infrared monitoring system, described X-optical mechaical scanning system comprises DR/CR image documentation equipment and x-ray dose instrument, described enhancing image system comprises contrast medium injector and capillary brass pipe, the continuous loading system of described hydrostatic control comprises hydraulic jack and small-scale liquid press pump, described mechanical index test macro comprises spoke pressure transducer, strainometer and digital-scroll technique instrument, described acoustic emission monitoring system comprises AE sensor and data collection host, described thermal infrared monitoring system comprises thermal infrared inductor, coal rock specimen is placed in hydraulic jack, hydraulic jack is connected to small-scale liquid press pump by oil pressure gauge, cardiografin being injected contrast medium injector is expelled in coal rock specimen by capillary brass pipe, described coal rock specimen upper end arranges spoke pressure transducer, described spoke pressure transducer is connected to digital-scroll technique instrument, described digital-scroll technique Instrument connection is to strainometer, AE sensor is set around described coal rock specimen, AE sensor is connected to data collection host, described thermal infrared inductor is set up in coal rock specimen periphery 0.5m position, coal rock specimen surface temperature is monitored, described x-ray dose instrument connects DR/CR image documentation equipment, described x-ray dose instrument receives information by receiver.
Described coal rock specimen mechanical property testing method, the large technology of integrated traditional mechanics characteristic test, medical image and rock burst intellectual monitoring three is integrated, and specifically comprises the following steps:
(1) open mechanics test platform and DR/CR image documentation equipment, check the normal operation of six Iarge-scale system simultaneously;
(2) manufactured coal rock specimen is placed in mechanics machine load plate position, and AE sensor and coal rock specimen are fixed;
(3) injection of contrast medium, ensures that capillary brass pipe and test specimen center pit are full of contrast solution, records injected dose simultaneously;
(4) carry out a DR/CR image scan and record is carried out to primary data;
(5) carry out mechanical property testing to coal rock specimen, controlled loading speed is 1mm/min, and namely interval 20s carries out once record to other each index simultaneously.
As the present invention's further scheme: described coal rock specimen specification is: diameter is 50mm, be highly 100mm, cylindrical specimen center-hole diameter 3mm, hole depth 80mm.
Compared with prior art, the invention has the beneficial effects as follows: it is little and be convenient to the feature of movement that this system has volume, and cost is low; Utilize shadowgraph technique to research and develop the angiography system having and strengthen imaging function, the imaged image of acquisition is clear, and realizes the analysis on the meso-scales such as rock sample test piece internal tiny crack, and experimental data is more accurate; The present invention is novel in design, and rationally, flexible operation is simple and easy, has very strong practical value for structure.Adopt traditional mechanics characteristic test, medical image and rock burst intellectual monitoring complex art method, for coal rock specimen mechanical property testing problem, propose polynary index parameter content, especially propose as main innovation with DR/CR image index, these index parameters can directly be calculated by fractal crack equation, and then realize assessing coal and rock engineering stability.
Accompanying drawing explanation
Fig. 1 is the Technology Roadmap of coal rock specimen mechanical property testing system.
Fig. 2 is the system testing schematic diagram of coal rock specimen mechanical property testing system.
Fig. 3 is process flow diagram in coal rock specimen mechanical property testing systems approach.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1 ~ 3, in the embodiment of the present invention, a kind of coal rock specimen mechanical property testing system, comprise traditional mechanics characteristic test, medical image and rock burst intellectual monitoring, described traditional mechanics characteristic test comprises mechanical index test macro 3 and the continuous loading system 4 of hydrostatic control, described medical image comprises X-optical mechaical scanning system 1 and strengthens image system 2, described rock burst intellectual monitoring comprises acoustic emission monitoring system 5 and thermal infrared monitoring system 6, described X-optical mechaical scanning system 1 comprises DR/CR image documentation equipment 11 and x-ray dose instrument 12, described enhancing image system 2 comprises contrast medium injector 21 and capillary brass pipe 22, the continuous loading system 4 of described hydrostatic control comprises hydraulic jack 41 and small-scale liquid press pump 42, described mechanical index test macro 3 comprises spoke pressure transducer 31, strainometer 32 and digital-scroll technique instrument 33, described acoustic emission monitoring system 5 comprises AE sensor 51 and data collection host 52, described thermal infrared monitoring system 6 comprises thermal infrared inductor 61, coal rock specimen 7 is placed in hydraulic jack 41, hydraulic jack 41 is connected to small-scale liquid press pump 42 by oil pressure gauge 43, cardiografin being injected contrast medium injector 21 is expelled in coal rock specimen 7 by capillary brass pipe 22, described coal rock specimen 7 upper end arranges spoke pressure transducer 31, described spoke pressure transducer 31 is connected to digital-scroll technique instrument 33, described digital-scroll technique instrument 33 is connected to strainometer 32, described coal rock specimen 7 surrounding arranges AE sensor 51, AE sensor 51 is connected to data collection host 52, described thermal infrared inductor 61 is set up in coal rock specimen 7 periphery 0.5m position, coal rock specimen 7 surface temperature is monitored, described x-ray dose instrument 12 connects DR/CR image documentation equipment 11, described x-ray dose instrument 12 receives information by receiver 34.
The large technology of the integrated traditional mechanics characteristic test of described coal rock specimen mechanical property testing method, medical image and rock burst intellectual monitoring three is integrated, and specifically comprises the following steps:
(1) open mechanics test platform and DR/CR image documentation equipment 11, check the normal operation of six Iarge-scale system simultaneously;
(2) manufactured coal rock specimen 7 be placed in mechanics machine load plate position and AE sensor 51 and coal rock specimen 7 are fixed, requiring that coal rock specimen 7 specification is: diameter is 50mm, is highly 100mm, cylindrical specimen center-hole diameter 3mm, hole depth 80mm;
(3) injection of contrast medium, ensures that capillary brass pipe 22 and coal rock specimen 7 center pit are full of contrast solution, records injected dose simultaneously;
(4) carry out a DR/CR image scan and record is carried out to primary data, as shown in table 1;
Table 1 coal rock sample test piece primary data record
(5) carry out mechanical property testing to coal petrography sample, controlled loading speed is 1mm/min, and namely interval 20s carries out once record to other each index simultaneously, as shown in table 2;
Table 2 1# coal rock sample test piece data record
The present invention is mainly for coal rock specimen mechanical property testing problem, the large technology of integrated traditional mechanics characteristic test, medical image and rock burst intellectual monitoring three is integrated, construct six acquisitions of Iarge-scale system realization to coal rock specimen multi objective parameter, traditional coal rock specimen mechanics parameter is only the test of counter stress and strain parameter, the present invention is based on X-ray image technology and propose DR/CR image index first, as Gray amount (Gray), crack's volume (μm
3), cranny development speed (μm
3/ s), the Index Content such as radiography dosage (ml).
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (3)
1. a coal rock specimen mechanical property testing system, comprise traditional mechanics characteristic test, medical image and rock burst intellectual monitoring, it is characterized in that, described traditional mechanics characteristic test comprises mechanical index test macro and the continuous loading system of hydrostatic control, described medical image comprises X-optical mechaical scanning system and strengthens image system, described rock burst intellectual monitoring comprises acoustic emission monitoring system and thermal infrared monitoring system, described X-optical mechaical scanning system comprises DR/CR image documentation equipment and x-ray dose instrument, described enhancing image system comprises contrast medium injector and capillary brass pipe, the continuous loading system of described hydrostatic control comprises hydraulic jack and small-scale liquid press pump, described mechanical index test macro comprises spoke pressure transducer, strainometer and digital-scroll technique instrument, described acoustic emission monitoring system comprises AE sensor and data collection host, described thermal infrared monitoring system comprises thermal infrared inductor, coal rock specimen is placed in hydraulic jack, hydraulic jack is connected to small-scale liquid press pump by oil pressure gauge, cardiografin being injected contrast medium injector is expelled in coal rock specimen by capillary brass pipe, described coal rock specimen upper end arranges spoke pressure transducer, described spoke pressure transducer is connected to digital-scroll technique instrument, described digital-scroll technique Instrument connection is to strainometer, described thermal infrared inductor is set up in coal rock specimen periphery 0.5m position, coal rock specimen surface temperature is monitored, AE sensor is connected to data collection host, described x-ray dose instrument connects DR/CR image documentation equipment, described x-ray dose instrument receives information by receiver.
2. a coal rock specimen mechanical property testing method as claimed in claim 1, is characterized in that, the large technology of integrated traditional mechanics characteristic test, medical image and rock burst intellectual monitoring three is integrated, and specifically comprises the following steps:
(1) open mechanics test platform and DR/CR image documentation equipment, check the normal operation of six Iarge-scale system simultaneously;
(2) manufactured coal rock specimen is placed in mechanics machine load plate position, and AE sensor and coal rock specimen are fixed;
(3) injection of contrast medium, ensures that capillary brass pipe and coal rock specimen center pit are full of contrast solution, records injected dose simultaneously;
(4) carry out a DR/CR image scan and record is carried out to primary data;
(5) carry out mechanical property testing to coal rock specimen, controlled loading speed is 1mm/min, and namely interval 20s carries out once record to other each index simultaneously.
3. coal rock specimen mechanical property testing method according to claim 2, is characterized in that, described coal rock specimen specification is: diameter is 50mm, is highly 100mm, cylindrical specimen center-hole diameter 3mm, hole depth 80mm.
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| CN105277428A (en) * | 2015-12-01 | 2016-01-27 | 中国矿业大学 | Mechanical property damage change measurement system and method for fragile materials under high-temperature and low-temperature load |
| CN105865929A (en) * | 2016-03-30 | 2016-08-17 | 中国科学院力学研究所 | Rock material fracture characteristic test system 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 |
| CN106124731A (en) * | 2016-06-16 | 2016-11-16 | 中国矿业大学(北京) | A kind of line holographic projections numerical simulation laboratory table and application process |
| CN106323999A (en) * | 2016-08-12 | 2017-01-11 | 中国科学院地质与地球物理研究所 | Intervention enhancement imaging method for rock hydrofracture test cracks |
| CN106368704A (en) * | 2016-10-11 | 2017-02-01 | 中国地质大学（北京） | Portable drilled well coal sample imaging device and coal sample three-dimensional image collecting method thereof |
| CN106597529A (en) * | 2016-12-16 | 2017-04-26 | 青岛海之源智能技术有限公司 | Experiment device used for studying microwave radiation change of a rock cracking process in earthquake |
| CN107144639A (en) * | 2017-05-12 | 2017-09-08 | 江苏师范大学 | A kind of coupling model of coal sample intensity and loading speed and characteristics of Acoustic Emission parameter |
| CN107328643A (en) * | 2017-06-20 | 2017-11-07 | 山东科技大学 | Under dead load in coal petrography assembly test specimen coal dynamic characteristic test method |
| CN108844871A (en) * | 2018-03-12 | 2018-11-20 | 中国矿业大学 | More infra-red radiation observation devices and method |
| CN109100423A (en) * | 2018-10-15 | 2018-12-28 | 吉林大学 | Damage of rock test experimental bed under a kind of ultrasonic activation |
| CN109341562A (en) * | 2018-12-03 | 2019-02-15 | 重庆工程职业技术学院 | A kind of device detecting lateral deformation of cement-based material |
| CN110308166A (en) * | 2019-07-05 | 2019-10-08 | 中国矿业大学 | Utilize the experimental provision and method of moisture content and distribution in X-ray measurement coal petrography |
| CN113188909A (en) * | 2021-04-28 | 2021-07-30 | 中国矿业大学 | Infrared radiation identification method for bearing starting point of initiation and stable expansion of coal rock crack |
| RU2756038C1 (en) * | 2020-12-30 | 2021-09-24 | Федеральное государственное автономное образовательное учреждение высшего образования "Дальневосточный федеральный университет" (ДВФУ) | Method for determining stress-strain state of rock samples |
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| CN105277428A (en) * | 2015-12-01 | 2016-01-27 | 中国矿业大学 | Mechanical property damage change measurement system and method for fragile materials under high-temperature and low-temperature load |
| 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 |
| CN105865929A (en) * | 2016-03-30 | 2016-08-17 | 中国科学院力学研究所 | Rock material fracture characteristic test system and method thereof |
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| CN106124731A (en) * | 2016-06-16 | 2016-11-16 | 中国矿业大学(北京) | A kind of line holographic projections numerical simulation laboratory table and application process |
| CN106323999B (en) * | 2016-08-12 | 2018-03-09 | 中国科学院地质与地球物理研究所 | A kind of rock hydraulic fracturing experiment crack intervention Enhanced Imaging method |
| CN106323999A (en) * | 2016-08-12 | 2017-01-11 | 中国科学院地质与地球物理研究所 | Intervention enhancement imaging method for rock hydrofracture test cracks |
| CN106368704A (en) * | 2016-10-11 | 2017-02-01 | 中国地质大学（北京） | Portable drilled well coal sample imaging device and coal sample three-dimensional image collecting method thereof |
| CN106597529A (en) * | 2016-12-16 | 2017-04-26 | 青岛海之源智能技术有限公司 | Experiment device used for studying microwave radiation change of a rock cracking process in earthquake |
| CN107144639B (en) * | 2017-05-12 | 2019-09-03 | 江苏师范大学 | The method for building up of the coupling model of coal sample intensity and loading speed and acoustic emission parameters |
| CN107144639A (en) * | 2017-05-12 | 2017-09-08 | 江苏师范大学 | A kind of coupling model of coal sample intensity and loading speed and characteristics of Acoustic Emission parameter |
| CN107328643A (en) * | 2017-06-20 | 2017-11-07 | 山东科技大学 | Under dead load in coal petrography assembly test specimen coal dynamic characteristic test method |
| CN107328643B (en) * | 2017-06-20 | 2019-05-28 | 山东科技大学 | Under dead load in coal petrography assembly test specimen coal dynamic characteristic test method |
| CN108844871A (en) * | 2018-03-12 | 2018-11-20 | 中国矿业大学 | More infra-red radiation observation devices and method |
| CN109100423A (en) * | 2018-10-15 | 2018-12-28 | 吉林大学 | Damage of rock test experimental bed under a kind of ultrasonic activation |
| CN109341562A (en) * | 2018-12-03 | 2019-02-15 | 重庆工程职业技术学院 | A kind of device detecting lateral deformation of cement-based material |
| CN110308166A (en) * | 2019-07-05 | 2019-10-08 | 中国矿业大学 | Utilize the experimental provision and method of moisture content and distribution in X-ray measurement coal petrography |
| CN110308166B (en) * | 2019-07-05 | 2020-06-05 | 中国矿业大学 | Experimental device and method for measuring moisture content and distribution in coal rock by utilizing X-ray |
| WO2021003996A1 (en) * | 2019-07-05 | 2021-01-14 | 中国矿业大学 | Experimentation apparatus and method utilizing x-ray for measuring content and distribution of water in coal rock |
| RU2756038C1 (en) * | 2020-12-30 | 2021-09-24 | Федеральное государственное автономное образовательное учреждение высшего образования "Дальневосточный федеральный университет" (ДВФУ) | Method for determining stress-strain state of rock samples |
| CN113188909A (en) * | 2021-04-28 | 2021-07-30 | 中国矿业大学 | Infrared radiation identification method for bearing starting point of initiation and stable expansion of coal rock crack |
| CN113188909B (en) * | 2021-04-28 | 2022-03-01 | 中国矿业大学 | Infrared radiation identification method for bearing starting point of initiation and stable expansion of coal rock crack |
| CN113740227A (en) * | 2021-08-26 | 2021-12-03 | 中国科学院西北生态环境资源研究院 | Survey device that soil macroporosity flows |
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