CN106018096A - Method for monitoring and positioning crack development areas in coal and rock fracture procedures by means of infrared radiation - Google Patents
Method for monitoring and positioning crack development areas in coal and rock fracture procedures by means of infrared radiation Download PDFInfo
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- CN106018096A CN106018096A CN201610572831.5A CN201610572831A CN106018096A CN 106018096 A CN106018096 A CN 106018096A CN 201610572831 A CN201610572831 A CN 201610572831A CN 106018096 A CN106018096 A CN 106018096A
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- 239000003245 coal Substances 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 73
- 230000005855 radiation Effects 0.000 title claims abstract description 48
- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 239000011435 rock Substances 0.000 title abstract description 11
- 238000011161 development Methods 0.000 title abstract description 8
- 230000008569 process Effects 0.000 claims description 45
- 238000001514 detection method Methods 0.000 claims description 11
- 238000002955 isolation Methods 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 5
- 238000012935 Averaging Methods 0.000 claims description 2
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000011160 research Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000001931 thermography Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 abstract 2
- 238000005065 mining Methods 0.000 abstract 2
- 230000002159 abnormal effect Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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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
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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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording 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
- G01N2203/0014—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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
Abstract
The invention provides a method for monitoring and positioning crack development areas in coal and rock fracture procedures by means of infrared radiation, and relates to the field of water conservation mining and rock stratum control. The method is applicable to detecting crack development laws and development locations in coal and rock fracture research procedures. The method includes determining bearing coal and rock fracture and failure time nodes by the aid of variance indexes of successive difference infrared thermal imaging sequence diagrams; extracting infrared thermal imaging diagrams at current moments according to the time nodes on the basis of the time nodes to position the crack development areas at bearing coal and rock fracture moments so as to temporally and spatially predict the crack development areas. The method has the advantages that research results can be applied to monitoring and controlling human engineering disasters such as coal (rock) burst and mine water inrush due to bearing coal and rock fracture, and the method particularly has scientific significance on enriching water conservation mining and rock stratum control theories for mines.
Description
Technical field
The present invention relates to water-retaining production and CONTROL OF STRATA MOVEMENT field, be specifically related to the red of seam area in coal petrography rupture process
External radiation monitoring and positioning method.
Background technology
Coal petrography stress rupture unstability be cause the surrender of coal (rock) quick-fried, ore pillar to cave in, the mine calamity such as water bursting in mine and ore deposit shake
The basic reason of evil.Research shows, coal petrography is in carrying stress, deformation and rupture process, along with the change of stress includes infrared
Wave band can change at interior electromagnetic radiation intensity, there will be heat infrared abnormality when rupturing unstability.Correct understanding coal petrography breaks
Split the infrared signature in Instability, find out the cranny development rule in coal petrography rupture process, so the most right
The rupture process of coal petrography is monitored and omen early warning, is the most important theories basis realizing water-retaining production.Chinese scholars at present
Coal petrography ruptured stage infrared signature is made numerous studies, but all there is problems in that whether (1) differentiates coal petrography
When being in micro rupture or collapse state, all use the index such as average infrared radiation temperature (AIRT), maximum (little) value, and these
Index reality test coal petrography sample carrying rupture process in, be difficult to substantially be observed change, thus result in can not quickly, have
Effect is caught coal petrography and is ruptured the exact time of unstability；(2) judge that carrying coal petrography breaks only with original this index of infrared thermal imagery sequence chart
During seam area during splitting, ignore accumulation heat (Thermal-mechanical Coupling) effect in carrying coal petrography rupture process, it is impossible to aobvious
Write, accurately differentiate carrying coal petrography rupture process intermediate infrared radiation abnormal information.Therefore, be badly in need of at present research a kind of can quickly, have
The method of the seam area in the coal petrography rupture process of effect location.
Summary of the invention
The present invention solves the problems referred to above, utilize by the variance differing from infrared thermal imagery sequence chart, by difference infrared thermal imagery sequence chart,
Respectively from the time with spatially overcome disadvantages mentioned above.
To achieve these goals, technical solution of the present invention is as follows:
The infra-red radiation monitoring and positioning method of seam area in a kind of coal petrography rupture process, the method comprises the following steps:
A, the original infra-red radiation information obtained in carrying coal petrography rupture process: utilize infrared radiation detection system to monitor and store
The infra-red radiation information of coal petrography outer surface in carrying coal petrography rupture process, obtains carrying original infrared thermal imagery in coal petrography rupture process
Sequence chart；
B, calculating are by difference infrared thermal imagery sequence chart: the coal petrography in the coal petrography original infrared thermal imagery sequence chart obtaining step (a) is former
Beginning infrared thermal imagery sequence is subtracted each other frame by frame, obtains carrying in coal petrography rupture process by difference infrared thermal imagery sequence chart；
The timing node that c, the infra-red radiation Information abnormity determined in carrying coal petrography rupture process occur: step (b) is obtained
Variance is calculated, when finding out the extreme value by the variance differing from infrared thermal imagery sequence chart and corresponding generation by differing from infrared thermal imagery sequence chart
Between point, and judge to be whether carrying coal petrography moment of rupture by the extreme value time of origin point of difference infrared thermal imagery sequence chart variance；
D, determine carrying coal petrography moment of rupture seam area: according to step (c) obtains by difference infrared thermal imagery sequence chart
The extreme value of variance and corresponding time of origin point, extract this moment by difference infrared thermal imagery sequence chart, finally determine carrying coal petrography
Moment of rupture seam area.
Further, step (c) carries the variance by difference infrared thermal imagery sequence chart of coal petrography rupture process according to formula
(I) being calculated, public formula (I) is:, whereinFor the variance by difference infrared thermal imagery sequence chart；For original infrared thermal imagery sequence chartkThe two-dimension temperature of frame
Matrix；i (i =1,2…,M) it is the line number of temperature matrices,MTotal line number for temperature matrices；j (j =1,2…,N) it is temperature
Degree matrix column number,NTotal columns for temperature matrices；,For original
Infrared thermal imagery sequence chartkThe meansigma methods of frame.
Further, above-mentioned infrared radiation detection system includes forcing press, plastic sheeting, carrying coal petrography, isolation fully sheathed case
Body, thermal infrared imager and data collecting instrument.
Further, above-mentioned forcing press, plastic sheeting, carrying coal petrography and thermal infrared imager are respectively positioned on isolation closed box
Internal.
Further, above-mentioned carrying coal petrography is positioned on forcing press.
Further, the upper and lower surface that above-mentioned carrying coal petrography contacts with forcing press is provided with plastic sheeting.
Further, above-mentioned data collecting instrument is connected with forcing press and thermal infrared imager respectively.
Further, when starting monitoring carrying coal petrography rupture process intermediate infrared radiation information in step (a)., synchronize simultaneously
Start forcing press and the thermal infrared imager of infrared radiation detection system.
Compared with prior art, the beneficial effects of the present invention is:
(1) present invention employs this new statistical indicator of variance by difference infrared thermal imagery sequence chart and can reflect the carrying of coal petrography
Stress and radiant temperature field situation, can be as judging to carry whether coal petrography occurs to destroy and lose the standard of bearing capacity.
This index has the advantage that (a) is possible not only to by differing from the different of infrared thermal imagery sequence chart by the variance differing from infrared thermal imagery sequence chart
Often information is by concrete Data Representation out, and by the difference differing from infrared thermal imagery sequence chart, adjacent two frames has been carried out secondary and has put
Greatly.B () is come by the ratio (amplitude) by the variance of difference infrared thermal imagery sequence chart of adjacent two frames can quantitative identification coal exactly
Whether rock is in micro rupture or collapse state.C () this index catches coal petrography and ruptures the ability of unstability information, hence it is evident that be better than average
The indexs such as infrared radiation temperature (AIRT), maximum (little) value.
(2) present invention employs by difference infrared thermal imagery sequence chart show carrying coal petrography rupture process in cranny development
District.This index has the advantage that (a) disappears the general character part of adjacent two frame original infrared sequence figure by difference infrared thermal imagery sequence chart
Remove, only retain the difference section of adjacent two frame original infrared thermal imagery sequence chart, thus improve it and differentiate that carrying coal petrography ruptured
The significance of journey intermediate infrared radiation abnormal information and accuracy.B () eliminates the accumulation heat (heating power in carrying coal petrography rupture process
Coupling) effect, only remain infra-red radiation (instantaneous) variation characteristic of STRESS VARIATION moment coal petrography, can more effectively extract carrying
Infrared signature when coal petrography ruptures.C (), compared to original infrared thermal imagery sequence chart, the thermography shown by this index is abnormal
Region is more significantly and directly perceived, bigger, so this index can find in time with the contrast of other infra-red radiation normal regions
Seam area in carrying coal petrography rupture process.
Accompanying drawing explanation
Fig. 1 is the flow chart of the infra-red radiation monitoring and positioning method of seam area in coal petrography rupture process in the present invention；
Fig. 2 is the structural representation of coal petrography infra-red radiation monitoring system in the present invention；
Fig. 3 is the original infrared thermal imagery sequence chart of a certain carrying coal petrography in the present invention；
Fig. 4 be a certain carrying coal petrography in Fig. 3 by difference infrared thermal imagery sequence chart；
Fig. 5 is that in the present invention, a certain coal petrography load and the variance by difference infrared thermal imagery sequence chart change over curve chart；
In figure: 1-forcing press；2-plastic sheeting；3-carries coal petrography；4-isolates closed box；5-thermal infrared imager；The infrared spoke of 6-
Penetrate Acquisition Instrument.
Detailed description of the invention
With specific embodiment, the present invention is further described below in conjunction with the accompanying drawings, in order to the technology people in this area
Member understands the present invention.
As shown in Figure 1 be the flow chart of the present invention, in coal petrography rupture process, the infra-red radiation monitoring of seam area is fixed
Method for position, comprises the following steps:
A, the original infra-red radiation information obtained in carrying coal petrography rupture process.Implementing before this step, need to prepare in advance red
External radiation detection system, as shown in Figure 2.Infrared radiation detection system includes forcing press 1, plastic sheeting 2, carrying coal petrography 3, isolation
Closed box 4, thermal infrared imager 5 and data collecting instrument 6；Forcing press 1, plastic sheeting 2, carrying coal petrography 3 and thermal infrared imager 5 are equal
Being positioned at the inside of isolation closed box 4, the setting of isolation closed box 4 is primarily to avoid external environment impact to bear coal petrography
The infra-red radiation information of 3, thus improve the accuracy of infrared radiation detection system；Carrying coal petrography 3 is positioned on forcing press 1, carrying
The upper and lower surface that coal petrography 3 contacts with forcing press 1 is provided with plastic sheeting 2；Data collecting instrument 6 respectively with forcing press 1 and infrared thermal imagery
Instrument 5 connects.Utilize infrared radiation detection system to monitor and store the infra-red radiation of coal petrography outer surface in carrying coal petrography 3 rupture process
Information, obtains carrying original infrared thermal imagery sequence chart in coal petrography 3 rupture process, as shown in Figure 3.Start monitoring carrying coal petrography 3 to break
During splitting during infra-red radiation information, the forcing press 1 of synchronous averaging infrared radiation detection system and thermal infrared imager 5 simultaneously.
B, calculating are by difference infrared thermal imagery sequence chart.In the carrying coal petrography 3 original infrared thermal imagery sequence chart that step (a) is obtained
Coal petrography original infrared thermal imagery sequence subtract each other frame by frame, obtain carrying by difference infrared thermal imagery sequence chart in coal petrography 3 rupture process,
As shown in Figure 4.
The timing node that c, the infra-red radiation Information abnormity determined in carrying coal petrography 3 rupture process occur.Step (b) is obtained
That arrives calculates variance by difference infrared thermal imagery sequence chart, finds out the extreme value of the variance by difference infrared thermal imagery sequence chart and corresponding sending out
Raw time point, and judge whether the extreme value time of origin point by difference infrared thermal imagery sequence chart variance is carrying coal petrography moment of rupture.
The variance by difference infrared thermal imagery sequence chart of carrying coal petrography 3 rupture process is calculated according to public formula (I)；Public formula (I) is:, whereinFor by difference infrared thermal imagery sequence
The variance of figure；For original infrared thermal imagery sequence chartkThe two-dimension temperature matrix of frame；i (i =1,2…,M) it is temperature
The line number of degree matrix,MTotal line number for temperature matrices；j (j =1,2…,N) it is the row number of temperature matrices,NFor temperature square
Total columns of battle array；,For original infrared thermal imagery sequence chartkFrame
Meansigma methods.
D, determine carrying coal petrography moment of rupture seam area.According to step (c) obtains by difference infrared thermal imagery sequence
The extreme value of the variance of figure and corresponding time of origin point, extract this moment by difference infrared thermal imagery sequence chart, finally determine carrying
Coal petrography 3 moment of rupture seam area.
Fig. 5 is the load of a certain carrying coal petrography in the present invention and changes over by the variance differing from infrared thermal imagery sequence chart
Curve chart, it can be seen that carrying coal petrography is in rupture process, load occurs with the variance by difference infrared thermal imagery sequence chart simultaneously
Change, therefore, the variance by difference infrared thermal imagery sequence chart can be by the abnormal information by difference infrared thermal imagery sequence chart by concrete
Data Representation is out.Being come by the ratio (amplitude) by the variance of difference infrared thermal imagery sequence chart of adjacent two frames can be the most quantitative
Differentiate whether coal petrography is in micro rupture or collapse state.This index catches coal petrography and ruptures the ability of unstability information, hence it is evident that be better than
The indexs such as average infrared radiation temperature (AIRT), maximum (little) value.Utilize this index of variance by difference infrared thermal imagery sequence chart
Improve its significance differentiating carrying coal petrography rupture process intermediate infrared radiation abnormal information and accuracy.
Embodiment of above is only in order to illustrate the present invention and and unrestricted technical scheme described in the invention；Although therefore
This specification with reference to each above-mentioned embodiment to present invention has been detailed description, but the ordinary skill of this area
Personnel should be appreciated that and still can modify the present invention or equivalent；And all without departing from the present invention spirit and
The technical scheme of scope and improvement thereof, it all should be contained in the middle of scope of the presently claimed invention.
Claims (8)
1. the infra-red radiation monitoring and positioning method of seam area in coal petrography rupture process, it is characterised in that the method include with
Lower step:
A, the original infra-red radiation information obtained in carrying coal petrography rupture process: utilize infrared radiation detection system to monitor and store
The infra-red radiation information of coal petrography outer surface in carrying coal petrography rupture process, obtains carrying original infrared thermal imagery in coal petrography rupture process
Sequence chart；
B, calculating are by difference infrared thermal imagery sequence chart: the coal petrography in the coal petrography original infrared thermal imagery sequence chart obtaining step (a) is former
Beginning infrared thermal imagery sequence is subtracted each other frame by frame, obtains carrying in coal petrography rupture process by difference infrared thermal imagery sequence chart；
The timing node that c, the infra-red radiation Information abnormity determined in carrying coal petrography rupture process occur: step (b) is obtained
Variance is calculated, when finding out the extreme value by the variance differing from infrared thermal imagery sequence chart and corresponding generation by differing from infrared thermal imagery sequence chart
Between point, and judge to be whether carrying coal petrography moment of rupture by the extreme value time of origin point of difference infrared thermal imagery sequence chart variance；
D, determine carrying coal petrography moment of rupture seam area: according to step (c) obtains by difference infrared thermal imagery sequence chart
The extreme value of variance and corresponding time of origin point, extract this moment by difference infrared thermal imagery sequence chart, finally determine carrying coal petrography
Moment of rupture seam area.
2. the infra-red radiation monitoring and positioning method of seam area, its feature in coal petrography rupture process as claimed in claim 1
Being, in step (c), the variance by difference infrared thermal imagery sequence chart of carrying coal petrography rupture process is calculated according to public formula (I)；
Described public formula (I) is:, whereinFor by
The variance of difference infrared thermal imagery sequence chart；For original infrared thermal imagery sequence chartkThe two-dimension temperature matrix of frame；iFor
The line number of temperature matrices,i =1,2…,M,MTotal line number for temperature matrices；jFor the row number of temperature matrices,j =1,2…,N
,NTotal columns for temperature matrices；,For original infrared thermal imagery sequence
FigurekThe meansigma methods of frame.
3. the infra-red radiation monitoring and positioning method of seam area, its feature in coal petrography rupture process as claimed in claim 2
Being, described infrared radiation detection system includes forcing press (1), plastic sheeting (2), carrying coal petrography (3), isolation closed box
(4), thermal infrared imager (5) and data collecting instrument (6).
4. the infra-red radiation monitoring and positioning method of seam area, its feature in coal petrography rupture process as claimed in claim 3
Being, described forcing press (1), plastic sheeting (2), carrying coal petrography (3) and thermal infrared imager (5) are respectively positioned on isolation closed box
(4) inside.
5. the infra-red radiation monitoring and positioning method of seam area, its feature in coal petrography rupture process as claimed in claim 4
Being, described carrying coal petrography (3) is positioned on forcing press (1).
6. the infra-red radiation monitoring and positioning method of seam area, its feature in coal petrography rupture process as claimed in claim 5
Being, the upper and lower surface that described carrying coal petrography (3) contacts with forcing press (1) is provided with plastic sheeting (2).
7. the infra-red radiation monitoring and positioning method of seam area, its feature in coal petrography rupture process as claimed in claim 6
Being, described data collecting instrument (6) is connected with forcing press (1) and thermal infrared imager (5) respectively.
8. the infra-red radiation monitoring and positioning method of seam area, its feature in coal petrography rupture process as claimed in claim 7
It is, when starting monitoring carrying coal petrography rupture process intermediate infrared radiation information in step (a)., synchronous averaging infra-red radiation simultaneously
The forcing press (1) of detection system and thermal infrared imager (5).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610572831.5A CN106018096A (en) | 2016-07-20 | 2016-07-20 | Method for monitoring and positioning crack development areas in coal and rock fracture procedures by means of infrared radiation |
| PCT/CN2017/082998 WO2018014623A1 (en) | 2016-07-20 | 2017-05-04 | Infrared radiation monitoring and positioning method for fracture development zone used during fracturing of coal rock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610572831.5A CN106018096A (en) | 2016-07-20 | 2016-07-20 | Method for monitoring and positioning crack development areas in coal and rock fracture procedures by means of infrared radiation |
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| CN106018096A true CN106018096A (en) | 2016-10-12 |
Family
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| CN201610572831.5A Pending CN106018096A (en) | 2016-07-20 | 2016-07-20 | Method for monitoring and positioning crack development areas in coal and rock fracture procedures by means of infrared radiation |
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| WO (1) | WO2018014623A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018014623A1 (en) * | 2016-07-20 | 2018-01-25 | 中国矿业大学 | Infrared radiation monitoring and positioning method for fracture development zone used during fracturing of coal rock |
| CN107782622A (en) * | 2017-10-24 | 2018-03-09 | 中国矿业大学 | Stress gas coupling coal body damages infra-red radiation test device and method |
| WO2018122818A1 (en) * | 2016-12-30 | 2018-07-05 | 同济大学 | Method for detecting degree of development of asphalt pavement fracture based on infrared thermal image analysis |
| CN109443543A (en) * | 2018-11-23 | 2019-03-08 | 中国矿业大学 | The infra-red radiation for carrying coal petrography damage development quantifies characterizing method |
| CN109696354A (en) * | 2018-12-19 | 2019-04-30 | 昆明理工大学 | A kind of crack rock failure evolvement process intermediate infrared radiation monitoring device and method |
| CN110411572A (en) * | 2019-07-10 | 2019-11-05 | 中国矿业大学 | Carry the infra-red radiation monitoring and pre-alarming method of coal petrography rupture |
| CN111811933A (en) * | 2020-07-31 | 2020-10-23 | 中国矿业大学 | Infrared radiation information denoising method in bearing coal rock damage and fracture process |
| CN111982964A (en) * | 2020-07-08 | 2020-11-24 | 武汉工程大学 | Rock burst infrared monitoring device and method |
| 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 |
| CN113484145A (en) * | 2021-07-06 | 2021-10-08 | 中国矿业大学 | Infrared radiation information denoising, monitoring and early warning method in coal rock deformation and fracture process |
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| WO2018014623A1 (en) * | 2016-07-20 | 2018-01-25 | 中国矿业大学 | Infrared radiation monitoring and positioning method for fracture development zone used during fracturing of coal rock |
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| WO2018122818A1 (en) * | 2016-12-30 | 2018-07-05 | 同济大学 | Method for detecting degree of development of asphalt pavement fracture based on infrared thermal image analysis |
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| CN107782622A (en) * | 2017-10-24 | 2018-03-09 | 中国矿业大学 | Stress gas coupling coal body damages infra-red radiation test device and method |
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| CN110411572B (en) * | 2019-07-10 | 2020-12-15 | 中国矿业大学 | Infrared radiation monitoring and early warning method for bearing coal rock fracture |
| CN111982964B (en) * | 2020-07-08 | 2023-02-03 | 武汉工程大学 | Rock burst infrared monitoring device and method |
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| 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 |
| 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 |
| CN113484145A (en) * | 2021-07-06 | 2021-10-08 | 中国矿业大学 | Infrared radiation information denoising, monitoring and early warning method in coal rock deformation and fracture process |
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