In the carbonate belt of Tianxingzhou

Wuhan

there are giant thick-bedded arenated dolomites. Currently

there is no relevant experience or suggestion to determine its mechanical parameters. This study explores a method for determining the parameters of the Hoek-Brown (H-B) criterion for arenated dolomite using the linear transformation theory of the H-B and Mohr-Coulomb (M-C) criteria. It synthesizes previous research findings and conducts laboratory experiments. A simplified method was proposed to determine the upper limit of the maximum confining pressure by utilizing the static lateral pressure coefficient. The mechanical parameters of sandy dolomite were estimated

and recommended values were provided based on the proposed method. The findings indicate that the proposed simplified method of based on k1 effectively narrows the range of confining pressure  and enhances accuracy. Additionally

the geological strength index GSI of sandy dolomite correlates linearly with the unconfined compressive strength  

leading to an improved table of suggested GSI values. The material parameter is primarily influenced by rock type and fine-grained particle roughness

with =9 in this study

showing small value range and minimal impact on rock mechanical parameters. Furthermore

the relationship between  and rock mass shear strength is established by converting the H-B and M-C criteria. These results provide valuable insights for applying the H-B criterion

effectively addressing the challenge of determining the mechanical parameters of highly fractured dolomite rocks. This research is significant for determining the mechanical parameters of rock formations similar to those in Wuhan

China.