Correlation of stress analysis results with visual and microseismic monitoring at creighton mine |
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| Institution: | 1. Ground Control Branch, NIOSH, Pittsburgh, 15236 PA, USA;2. Coronado Coal LLC, Beckley, WV, USA;1. Department of Mining and Materials Engineering, McGill University, Montreal, QC, Canada;2. Vale Canada Limited, Sudbury, ON, Canada;1. School of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, PR China;2. School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo, PR China;1. NIOSH, Pittsburgh Mining Research Division (PMRD), Pittsburgh, PA 15236, USA;2. Department of Mining Engineering, West Virginia University, Morgantown, WV 26505, USA;1. GeoRessources, Ecole des Mines de Nancy, Université de Lorraine, France;2. INERIS, Ecole des Mines de Nancy, France |
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| Abstract: | A three-dimensional, elastic stress analysis was conducted using the boundary element method. The analysis has indicated that mining of a “destress slot” reduced the confinement and caused yielding of the ground adjacent to it. This is confirmed by both visual and microseismic observations which were made during the past three years. These results indicate that the slot has been effective in controlling the location and timing of a large part of the ground failure in the area and has thereby enhanced the inherent safety of the mining.The correlation of stress analysis results with visual and microseismic monitoring suggests that three-dimensional elastic stress analysis can be confidently used as a geomechanics design tool at Creighton Mine. This affirms the usefulness of the elastic boundary element technique and demonstrates that it can be applied succesfully to large simulations on a minicomputer. |
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