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Premining Stability Analysis Of A Shaft Pillar At The Homestake Mine
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Johnson, J. C. (1989). Premining Stability Analysis Of A Shaft Pillar At The Homestake Mine. Rock Mechanics as a Guide for Efficient Utilization of Natural Resources
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Johnson, J. C. (1989). Premining Stability Analysis Of A Shaft Pillar At The Homestake Mine. Rock Mechanics as a Guide for Efficient Utilization of Natural Resources
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Organization: International Conference on Ground Control in Mining
Pages: 8
Publication Date:
Jan 1, 1989
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Abstract
Abstract
| High-grade ore found in a shaft pillar at the Homestake Mine prompted a request for a Bureau of Mines study to determine if selected areas of the shaft pillar could be mined without jeopardizing the shaft. The design approach was to perform a finite-element study of the shaft pillar. Plan view and vertical sections were developed using two-dimensional, elastic, plane strain assumptions. Input into the model consisted of in situ stress measurements geologic mapping rock mass properties, and previous mining history. Results from the study indicated that ore-beating sections of the shaft pillar could be removed within the displacement tolerances acceptable for the shaft. Homestake engineers, using the results of the finite-element study and considering other factors, have designed and are beginning to mine the shaft pillar. |
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