Correlation between the rock mass properties and maximum horizontal stress: A case study of overcoring stress measurements

• Both vertical and maximum horizontal stress increase linearly with depth, confirming a clear depth-dependent stress regime. • No significant correlation exists between elastic modulus, Poisson's ratio, or RQD with depth, suggesting these properties are depth-independent in the studied rock masses. • The newly proposed characteristic parameter CERP shows a linear correlation with maximum horizontal stress at the same depth, offering a promising indicator for estimating in-situ stress. • The fuzzy identification method effectively captures the complex, fluctuating relationship between CERP and maximum horizontal stress, validating its use for geomechanical prediction and mining design.