Study on a Quantitative Indicator for Surface Stability Evaluation of Limestone Strata with a Shallowly Buried Spherical Karst Cave

This paper developed a quantitative evaluation necessary to ensure ground stability, so indicator (bearing capacity). A homogeneous axisymmetric model was generated, considering China’s stress field and the Karst topography characteristics, simultaneously obtaining component expression. We then determined bearing capacity calculation formula by combining strength theory of shear failure expressions. Finally, comparison results between theoretical analysis numerical simulation indicated that error less than 5%, result verified rationality formula.