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Artificial supports for coal mine ground control.
Bureau of Mines
Spokane, WA: U.S. Department of the Interior, Bureau of Mines, 1996 Jan; :1-17
The report is a discussion of four types of support systems developed by the U.S. Bureau of Mines for use in both room-and-pillar retreat and longwall mining systems. These are: Mobile Roof Support System; Steel-Fiber-Reinforced Concrete Cribbing; Yielding Steel Posts; and Lightweight Hydraulic Supports.
Coal-mines; Hydraulic-fluids; Pipes-Tubes; Steel-piles; Strata-control; Underground-supporting; Underpinning
NTIS Accession No.
Spokane, WA: U.S. Department of the Interior, Bureau of Mines