Infrared Radiation Characteristics During Crack Development in Water-Bearing Sandstone

被引:0
|
作者
K. Cao
Q. Yuan
G. Xie
Y. Shi
机构
[1] Anhui University of Finance and Economics,School of Management Science and Engineering
[2] China University of Mining and Technology,State Key Laboratory for Geomechanics and Deep Underground Engineering
[3] Anhui University of Science and Technology,State Key Laboratory for Mining Response and Disaster Prevention and Control in Deep Coal Mines
[4] Anhui University of Science and Technology,School of Mining and Safety Engineering
[5] Anhui University of Technology,School of Foreign languages
来源
Soil Mechanics and Foundation Engineering | 2021年 / 58卷
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摘要
We studied the infrared radiation (IR) characteristics of sandstone cracks with different water contents. We propose a new IR-based method to distinguish the initial development and damage point of cracks. The maximum variation of IR variance shows a quadratic relationship with water content. By defining crack initiation and damage using a stiffness stress curve, it can be concluded that the crack initiation and crack damage IR variance thresholds show a quadratic relationship with water content. The proportion of the two thresholds at the maximum IR variation amplitude does not change with increasing water content, yielding ratios of 47.51% and 78.19% for crack initiation and crack damage, respectively. The rock stress threshold of crack initiation and damage show a negative logarithmic relationship with their respective IR variance thresholds with correlation coefficients above 0.90.
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页码:209 / 214
页数:5
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