Variation routine of surface infrared radiation temperature of composite coal rock in fracture under load

doi:10.16265/j.cnki.issn1003-3033.2017.01.020

China Safety Science Journal ›› 2017, Vol. 27 ›› Issue (1): 110-115.doi: 10.16265/j.cnki.issn1003-3033.2017.01.020

• Safety Science of Engineering and Technology • Previous Articles Next Articles

Variation routine of surface infrared radiation temperature of composite coal rock in fracture under load

LI Xin^1,2, YANG Zhen^1,3, DAI Shuang¹, QIU Bin¹, XIN Yuan¹

1 School of Electrical and Engineering Control, Liaoning Technical University, Huludao Liaoning 125105, China
2 School of Mining, Liaoning Technical University, Fuxin Liaoning 123000, China
3 School of Mechanics and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China

Received:2016-09-19 Revised:2016-11-24 Published:2020-11-23

Abstract

Abstract: In order to realize the non-contactprediction of the coalrock dynamic disaster by infrared radiation and ensure coal mine safety, the evolution characteristics of surface infrared radiation temperature of composite coal rock and mudstonesample during deformation and fracturing were studied by infrared thermal imager. Fitting equation between temperature, stress and strain of coal, roofslab,floorslab and mudstone were established. The results show that there are thermoelastictand frictional hea effects during continuous loading tests of both samples.The physical mechanism is the same. Infrared radiation precursor of composite coal rock in fracture instability has been manifested as a rise in step. When the loading rate increasing, the temperature increases also.The temperature changes and stress or strain have a strong positive linear correlation. Infrared radiation temperature precursor of mudstone has been manifested as a trend of step and type spurt upward. The temperature change is more obvious than the coal rock. The correlation is slightly higher than the composite coal rock.

Key words: composite coal rock, deformation and fracture, infrared radiation temperature, frictional heat effect, thermoelastic effect

CLC Number:

X936

LI Xin, YANG Zhen, DAI Shuang, QIU Bin, XIN Yuan. Variation routine of surface infrared radiation temperature of composite coal rock in fracture under load[J]. China Safety Science Journal, 2017, 27(1): 110-115.

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Variation routine of surface infrared radiation temperature of composite coal rock in fracture under load

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