Longwall Gate Road Stability in a Steeply Pitching Thick Coal Seam with a Weak Roof
Description:
The U.S. Bureau of Mines (USBM) conducted ground pressure analysis of a wide abutment-type chain pillar in a two-entry gate road of a Western U.S. coal mine with an extremely weak immediate roof. About 15 m of fragile, low-strength mudstone lies between the seam and the lowest competent roof member. Three- and two-entry gate road designs with several pillar sizes and various secondary support systems have been employed to improve tailgate-entry stability, with varying results. This report discu…
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Date:
1995
Creator:
Barron, Lance R. & DeMarco, Matthew J.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department