ABSTRACT
When the GSI system was put forward by Hoek, The original RMR system was not completely abandoned and the transformation relations of the RMR system with GSI system of edition 1989 were also given, such as Equation (1). The RMR system is a scoring system with consideration of rock uniaxial compressive strength of σc, structural plane spacing SP, rock mass quality indicator RQD. So based on the database of IWHR, included a large number of experimental data, RMR index of rock is accurately scored, eigenvalues of rock RMR index is derived.
