At best, Colorado seams unusual

Journal Article · Tue Nov 01 04:00:00 EST 1983 · Coal Age; (United States)

OSTI ID:6943492

Jackson, D

Shaped not unlike a saucer at the Mad Hatter's tea party, the coal deposit now being mined by Walden Coal Co. on the Western Slope of Colorado has provided this small producer with a geologic setting that is allowing the company to register a 42-ton-per-manshift productivity figure in the record book. Contributing to this somewhat Alice-In-Wonderland production figure are the following features: Overburden, interburden and coal need not be blasted, only ripped with dozers. Overburden is removed with two scraper-loaders. A third unit is used during bad weather conditions. The upper seam is 16.5 ft thick, with overburden ranging in thickness from 2 ft to 35 ft. The lower seam is 25.5 ft thick and covered by 80 ft of interburden. Overburden-to-coal ratio averages 41/2:1. Pit haulage for overburden and coal averages 500 ft.

• OSTI ID: 6943492
• Journal Information: Coal Age; (United States), Journal Name: Coal Age; (United States) Vol. 88:11; ISSN COLAA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
COAL DEPOSITS
COAL MINES
COAL SEAMS
COLORADO
DIMENSIONS
EARTHMOVING EQUIPMENT
ENGINEERING
EQUIPMENT
EXCAVATION
FEDERAL REGION VIII
GEOLOGIC DEPOSITS
MATERIALS HANDLING
MATERIALS HANDLING EQUIPMENT
MINE HAULAGE
MINERAL RESOURCES
MINES
MINING
MINING ENGINEERING
NORTH AMERICA
OVERBURDEN
PRODUCTIVITY
RESOURCES
SURFACE MINING
THICKNESS
UNDERGROUND FACILITIES
USA