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- W3210031837 abstract "Joint roughness is one of the most important issues in the hydromechanical behavior of rock mass. Therefore, the joint roughness coefficient (JRC) estimation is of paramount importance in geomechanics engineering applications. Studies show that the application of statistical parameters alone may not produce a sufficiently reliable estimation of the JRC values. Therefore, alternative data-driven methods are proposed to assess the JRC values. In this study, Gaussian process (GP), K-star, random forest (RF), and extreme gradient boosting (XGBoost) models are employed, and their performance and accuracy are compared with those of benchmark regression formula (i.e. Z2, Rp, and SDi) for the JRC estimation. To analyze the models’ performance, 112 rock joint profile datasets having eight common statistical parameters (Rave, Rmax, SDh, iave, SDi, Z2, Rp, and SF) and one output variable (JRC) are utilized, of which 89 and 23 datasets are used for training and validation of models, respectively. The interpretability of the developed XGBoost model is presented in terms of feature importance ranking, partial dependence plots (PDPs), feature interaction, and local interpretable model-agnostic explanations (LIME) techniques. Analyses of results show that machine learning models demonstrate higher accuracy and precision for estimating JRC values compared with the benchmark empirical equations, indicating the generalization ability of the data-driven models in better estimation accuracy." @default.
- W3210031837 created "2021-11-08" @default.
- W3210031837 creator A5059541862 @default.
- W3210031837 date "2021-12-01" @default.
- W3210031837 modified "2023-09-30" @default.
- W3210031837 title "Data-driven estimation of joint roughness coefficient" @default.
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- W3210031837 doi "https://doi.org/10.1016/j.jrmge.2021.09.003" @default.
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