computer aided mine planning model and energy efficiency ratios of four mining systems
By: by Thomas S. Colvin.
Publisher: University Microfilms International
Published: 2003
Place of publication: Ann Arbor, Mich
Language: eng
Number of pages: 164
Subjects: Strip mining -- Mathematical models.; Coal mines and mining -- Mathematical models.; Srip mining -- Energy conservation.; Coal mines and mining -- Energy conservation.
Notes: Thesis--Iowa State University, 1977.

1