Mining Publication: Rock Mechanics Study of Shaft Stability and Pillar Mining, Homestake Mine, Lead, SD (In Three Parts): 3. Geomechanical Monitoring and Modeling Using UTAH3
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Original creation date: January 1996
A U.S. Bureau of Mines case study of pillar recovery in high-grade ore near the Ross 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. In this study, borehole extensometers and other instruments were installed to provide data for model verification and to monitor shaft displacement. Results of a recalibrated two-dimensional model (UTAH2) confirmed the premining stability evaluation. However, after mining began, concern developed because of racks and other signs of ground motion that appeared at considerable distances from the area of active pillar mining. An intense three-dimensional modeling effort using the computer modeling program UTAH3 was initiated. The results again showed the observed effects were within expectations and that the shaft would remain safe. Three-dimensional analyses of alternate pillar mining scenarios indicated that more of the shaft pillar ore reserve could be recovered than previously thought on the basis of two-dimensional analyses. This report focuses on startup and implementation of the three-dimensional model, calibration of the three-dimensional model, and application of the model to shaft pillar mining.
Authors: WG Pariseau, JC Johnson, MM McDonald, ME Poad
Report of Investigations - January 1996
NIOSHTIC2 Number: 00233931
U.S. Department of the Interior, Bureau of Mines, Report of Investigations 9618, NTIS number: PB96-144217, 1996 Jan; :1-29
See Also
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- Elastic and Shear Moduli of Coal Measure Rocks Derived from Basic Well Logs Using Fractal Statistics and Radial Basis Functions
- The Ground Response Curve, Pillar Loading and Pillar Failure in Coal Mines
- Modeling and Prediction of Ventilation Methane Emissions of U.S. Longwall Mines Using Supervised Artificial Neural Networks
- Modernization and Further Development of the NIOSH Mine Emergency Response Training System (MERITS), Phase 1
- MULSIM/NL Application and Practitioner's Manual
- MULSIM/NL Theoretical and Programmer's Manual
- Pillar Strength and Design Methodology for Stone Mines
- Reservoir Rock Properties of Coal Measure Strata of the Lower Monongahela Group, Greene County (Southwestern Pennsylvania), from Methane Control and Production Perspectives
- Rock Mechanics Study of Shaft Stability and Pillar Mining, Homestake Mine, Lead, SD (In Three Parts): 2. Mine Measurements and Confirmation of Premining Results
- Content source: National Institute for Occupational Safety and Health, Mining Program