Rock Mechanics Study of Shaft Stability and Pillar Mining, Homestake Mine, Lead,SD. (In Three Parts). 2. Mine Measurements and Confirmation of Premining Results

摘要

A U.S. Bureau of Mines case study of pillar recovery in high-grade ore near theRoss shaft at the Homestake Mine, Lead, SD, has demonstrated the usefulness of the finite-element method for evaluating shaft pillar mining plans and shaft stability. This report focuses on mine measurements and calibration of the two-dimensional computer model and is the second in a series of three Reports of Investigations describing the Ross shaft study. In this study, borehole extensometers and other instruments were installed to provide data for model verification and to monitor the shaft. Results of the recalibrated two-dimensional model (UTAH2) confirmed the premining stability evaluation.