Evaluating Rock Mass Properties of Vipingo Coral Limestone Quarry Based on a Modified Geological Strength Index (GSI) and State of Karstification

The process of evaluating rock mass strength requires that major structural features such as joints influence are considered. In carbonate masses, however, the is largely dependent on intact and play a secondary role. Laboratory experiments porous have shown reduces with increasing porosity, which has direct effect strength. Rock porosity however not been well accounted for in characterization methods currently use. This research applies modified GSI method masses based combination total porosity. main aim to quantify respect indicator state karstification, an inherent feature affects An empirical equation proposed whereby observed field by natural log value giving rise (GSIm). GSIm together laboratory properties used determine Vipingo coral limestone from RocLab software. A deterministic parametric slope stability analysis done using finite element software Phase 2 input parameters. results point dependence angle, height lithological unit. graphs make useful design guide slopes engineered this type mass.