Rib stability
Subtitle: practical considerations to optimize rib design
By: by W.C. Smith.
Series: Information circular -- 9323.; Information circular (United States. Bureau of Mines) -- 9323.
Publisher: U.S. Dept. of the Interior, Bureau of Mines
Published: 1992
Place of publication: Washington, D.C
Language: eng
Format: Microform
Number of pages: 16
Subjects: Ground control (Mining); Coal mines and mining -- Safety measures.; Coal -- Geology.; Structural stability.
Notes: Distributed to depository libraries in microfiche.

Shipping list no.: 93-0007-M.

Includes bibliographical references (p. 15-16).

Microfiche. [Washington, D.C. : Supt. of Docs., U.S. G.P.O., 1993] 1 microfiche : negative.