Assessment of the single-pass thick-seam longwall mining method. Final report

Technical Report · Thu Apr 01 04:00:00 EST 1982

OSTI ID:6739200

Adam, R F.J.; Douglas, W J

The objectives of the project are a review of the foreign experiences in longwall mining of thick seams, an evaluation of the US thick seam reserves, a mine design, equipment specifications, and an economic study for longwall mining in a single pass up to 16 feet in US conditions. The review of foreign experience shows a steady increase in the maximum height of extraction with several examples in the range of 13 to 15 feet. Longwall face equipment is available up to an 18 feet height of extraction, based upon shields support and shearer loader. There are important reserves of thick coal seams which can be mined by a longwall in a single pass (125 billion tons). In US conditions, a retreating face with a 16 foot height of extraction and a double entry system, driven 10 feet high, are proposed. The face stability can be improved by using a two bench face cut in good geological conditions. The economic study compares longwall mining with the room-and-pillar method. Longwall mining 16 feet high coal in a single pass can compete advantageously with room-and-pillar mining. 74 figures, 14 tables.

• Research Organization: Ketron, Inc., Wayne, PA (USA)
• DOE Contract Number: AC01-79ET14246
• OSTI ID: 6739200
• Report Number(s): DOE/ET/14246-T1; ON: DE83001401
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012000* -- Coal
Lignite
& Peat-- Mining
015000 -- Coal
Lignite
& Peat-- Economic
Industrial
& Business Aspects
COAL DEPOSITS
COAL MINES
COAL SEAMS
COMPARATIVE EVALUATIONS
DATA
DATA COMPILATION
DESIGN
DIMENSIONS
ECONOMIC ANALYSIS
ECONOMICS
EQUIPMENT
GEOLOGIC DEPOSITS
GLOBAL ASPECTS
INFORMATION
LONGWALL MINING
MINERAL RESOURCES
MINES
MINING
MINING EQUIPMENT
NUMERICAL DATA
RESOURCES
ROOM AND PILLAR MINING
SPECIFICATIONS
TECHNOLOGY ASSESSMENT
THICKNESS
UNDERGROUND FACILITIES
UNDERGROUND MINING