Blasting of hanging ore columns in chutes and drawing raises.

Bibliographic Details

Other Authors:	Gardner, E. D. (Eugene Delos), 1885-
Format:	Government Document eBook
Language:	English
Published:	Washington, D.C. : [publisher not identified], 1927.
Series:	Mines Bur. Rpt. of Investigation No. 2790
Subjects:	Ores. Electronic books.
Online Access:	Connect to the full text of this electronic document