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- Equipment, tools, and parts:
- Longwall shields
- Document types:
- Reports of Investigations
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Results 1 - 2 of 2
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1/1/1993 - Reports of InvestigationsThis report investigates the removal of gate road chain pillars in conjunction with longwall retreat mining. The objective was to determine how the pillars, supplemental support, and entries were affected by the longwall abutment pressure.
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1/1/1992 - Reports of InvestigationsRoof and floor contact pressure provided by the interaction of a shield with the surrounding strata are examined. Controlled forces were applied to an 800-ton two-leg shield using a mine roof simulator.
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Content source: National Institute for Occupational Safety and Health, Mining Program