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- Mine locations, excavations, and structures:
- Chain pillars
- Document types:
- Reports of Investigations
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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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Content source: National Institute for Occupational Safety and Health, Mining Program