Specifications for Selected Hydraulic-Powered Roof Supports: With a Methods to Estimate Support Requirement for Longwalls
Description:
Report issued by the Bureau of Mines discussing hydraulic-powered roof support specifications. As stated in the abstract, "this report presents observations made by Bureau engineers regarding hydraulic-powered roof supports that are currently being used or have been used on nearly all operating long-walls in the United States" (p. 1). This report includes tables, and illustrations.
Date:
September 1969
Creator:
Barry, A. J.; Nair, O. B. & Miller, J. S.
Item Type:
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Report
Partner:
UNT Libraries Government Documents Department