February 2000

Volume 52 Issue 2

FEATURED ARTICLES

Maintaining ring gears in ball mills David Kress	Preview
SME RESEARCH FORUM: Mining technology and research needs -- chemical products suppliers' perspective	Preview
Using option pricing to predict market values of publicly traded mining companies Andrew K. Simpson, Lynn F. Oates	Preview
Colorado miners discuss challenges of the new century Steve Kral	Preview
Peru remains committed to its mining industry Steve Kral	Preview

Systems approach to grinding improvements at the Tilden concentrator R.E. Mclvor, T.P. Weldum, B.J. Mahoski, R.S. Rasmussen	Abstract
Surface mine reserve definition and the high-grading fallacy M. Lemieux	Abstract
Cover system to mitigate ARD in an arid climate -- steup of field test plots at BHP Iron Ore's Mt. Whaleback operation M. O'Kane, D. Porterfield, M. Endersby, M.D. Haug	Abstract