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- Equipment, tools, and parts:
- Longwall shields
- Document types:
- Information Circulars
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10/1/2000 - Information CircularsThe proceedings provide information on several new technologies including guidelines for roof bolt length, pattern, and capacity; a new design method for longwall tailgate supports; and a technique for measuring loads developed within cable bolts.
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1/1/1992 - Information CircularsThis report examines shield design, operation practices, and the consequences for using high-capacity shield support systems. An optimization goal is to minimize support loading by using an active shield setting force compatible with strata behavior.
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Content source: National Institute for Occupational Safety and Health, Mining Program