ABSTRACT
Two case studies are presented on the application of practical rock mechanics programs for selecting support systems for mine openings and shafts in trona mines. Case study 1 presents (1) the results of rock mechanics evaluations for characterizing geologic conditions near the position of a future mine shaft and (2) a ground support interaction analysis for addressing liner requirements. Case study 2 consists of detailed measurements of roof bolt strains, roof deformation, and gas pressure in a mine roof. These measurements provide a better understanding of lateral forces imposed on roof bolts as a result of creep deformation and differences in mechanical properties near shale-trona interfaces. Results are used to enhance numerical modeling procedures used routinely in evaluations of mining plans.
