GEOTECHNICAL CHALLENGES AT THE BEAL MOUNTAIN MINE, MT
The Beal Mountain Mine near Anaconda, MT is an interesting case history of a mine that has continued operations despite several large pit wall failures over a period of about 10 years. The largest event involves some 4.5 million tons of rock that has moved steadily at a rate of about 0.05 ft/day since 1992.
This paper documents the geotechnical instrumentation and monitoring programs implemented at Beal to provide the company with a comfortable baseline that supported ongoing operations. The success and failure of a variety of stabilization measures will be discussed, along with typical instrumentation responses for several significant events. The success of Beal Mountain serves as a good model for mines faced with serious geotechnical challenges.
geotechnical, slide, Open pit, Monitoring