email: tfl3543@blackfoot.net

BEAR RIVER ZEOLITE CO., INC.
4005 East Glendale Road
Preston, ID 83263

tel: 406-827-3523
fax: 406-827-3543

Printer Friendly

 

BRZ MINING METHODS


BRZ pit

Depending on the location, the zeolite is overlain by 1 to 12 feet of zeolite rich soil. On the ridges, the cover is very little, and in the draws the soil is thicker. The overburden is stripped using a tractor dozer, currently a Caterpillar D 8 or D 9.  It is moved to the toe of the pit, and will eventually be dozed back over the pit for reclamation.

The deposit includes an 800 foot mountain. Zeolite can be sampled over a vertical extent of 800 feet and on more than 700 acres. The current pit covers more than 4 acres. Within the pit, the zeolite is remarkably homogeneous. Despite the apparent huge size of the deposit, the Company claims no reserves.

 


Blast Hole Drill

Although near-surface rock is easily ripped, it is more economical to drill and blast it. A Tamrock track drill is used to drill blast holes. Holes are loaded with ammonium nitrate and primed with powder and Easy-Det primers. Benches are 10 to 20 foot high, and each bench is accessed by a road. Quality control in the pit is visual.

 


Tractor ripping ore

Depending on the location, the zeolite is overlain by 1 to 12 feet of zeolite rich soil. On the ridges, the cover is very thin, and in the draws the soil is thicker. The overburden is stripped using a tractor dozer, currently a Caterpillar D 8 K. It is moved to the toe of the pit, and will eventually be dozed back over the pit for reclamation.


Loading with excavator

Loading is best performed with a Liehberr R 965 excavator with a 2 yard bucket to allow sorting of the oversize.


Loader with a 6 cubic yard bucket

Alternatively, a Caterpillar 986B loader with a 6 cubic yard bucket is used. The benches are cleaned with the D 8 K.


Rock trucks

Haulage is on approximately 4000 foot of road on an uphill grade of 2.5% to the mill. On higher benches, the grade will eventually be downhill. Caterpillar  769 B rock trucks are used. The trucks haul 18 to 20 tons per load, and the cycle time is about 30 minutes including loading.

With both trucks and the other existing equipment, the mine is capable of producing 120 tons per hour.


Looking in direction of plant and mine

View looking in direction of plant and mine from a recreational lake. Notice neither the plant nor the mine is visible.