Abstract
To realize the precise monitoring of multi-scale deformation and failure of rock mass by distributed optical fiber, the mechanical model of optical fiber and rock strata is established to analyze the mechanical characteristics and strain response of rock strata under the stages of elastic deformation, elastoplastic deformation. Finally, an optical fiber quantitative monitoring method for multi-scale deformation and failure of rock strata is presented to quantify the deformation characteristics of rock mass at different scales and failure modes in different regions. On this basis, the distributed optical fiber is embedded in a similar model to monitor the internal deformation of the strata of the model. Meanwhile, Digital image correlation (DIC) is used to observe the deformation of the strata in real-time to verify the accuracy of the proposed method. The research results can promote the application of optical fiber sensing technology in the field of mine engineering.
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