Research on Engineering Classification and Mechanical Parameters Estimation Method for Mining Rockmass

In order to solve the mining rock mechanics parameters selection problem, based on the three- zone theory and engineering practice, the paper propose d a classification method for mining rockmass using integrity index and height of three- zone, which could be measured directly, established relationships with the longit udinal wave velocity and geological strength index for rockmass, derived the pricing formula of key parameter in Hoek- Brown criterion, realized quantitative evaluation on mechanical properties of mining rockmass. Ultimately, the author summarized the general rule of parameters selection of mining rockmass. The engineering applicati on showed that this method of classification and mechanical paramete estimation was simple, practical and ftted engineering reality.