Abstract: Disintegrated dolomite is a geologically distinctive rock mass commonly encountered in hydraulic and transportation projects in Southwestern China. It exhibits pronounced spatial variability and material heterogeneity, making traditional investigation methods unreliable for quick parameter estimation. Frequent geohazards during construction highlight the need to determine their mechanical properties rapidly. This study combines field tests and statistical analysis to investigate the random distribution patterns and correlations of mechanical parameters in disintegrated dolomite. The results indicate that: (1) Correlations were established between uniaxial compressive strength (UCS), P-wave velocity (V_m), and point load strength (I_s(50)) for slightly and weakly disintegrated dolomite; (2) A predictive V_m-Needle Penetration Index (NPI) correlation model was developed for severely and completely disintegrated dolomite; (3) Optimal probability distributions were identified for mechanical parameters across different strata. The research results can provide a basis for disintegrated dolomite rock mass classification, categorization, and theoretical estimation of mechanical parameters.