Demonstration of longwall mining in a steeply dipping coal seam

Book · Thu Jan 01 04:00:00 EST 1987

OSTI ID:7074713

Kennedy, M R; Reschke, L M

This report describes the demonstration of longwall mining in a seam dipping 27/sup 0/to 34/sup 0/. Equipment was selected on the basis of capability, compatibility, and cost. The longwall equipment operated very well on the steep pitch with an average equipment downtime of 21.9%. Coal handling outby the face was a problem that caused an additional downtime of 19.5%. Development of the panels proved to be the major problem in the economics of longwall mining on a steeply dipping seam. During the first 9 months of operation, the longwall averaged 71.9 tons per worker-shift (TPWS) and development averaged 0.6 TPWS, for an overall average of 14.1 TPWS. Had mining continued, timing of development would have been another major problem. Monitoring of subsidence, pillar stability, and shield loading was done in connection with mining, but little useful information was gained from the monitoring.

• OSTI ID: 7074713
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012030* -- Coal
Lignite
& Peat-- Underground Mining-- (1987-)
COAL DEPOSITS
COAL MINERS
COAL MINING
COAL SEAMS
CUTTER LOADERS
CUTTING MACHINES
ECONOMICS
EQUIPMENT
GEOLOGIC DEPOSITS
GEOLOGIC STRATA
GEOLOGIC STRUCTURES
HAULAGE EQUIPMENT
INCLINED STRATA
LOADERS
LONGWALL MINING
MATERIALS HANDLING EQUIPMENT
MECHANICAL STRUCTURES
MINERAL RESOURCES
MINERS
MINING
MINING EQUIPMENT
MONITORING
PERFORMANCE
PERSONNEL
PRODUCTIVITY
RESOURCES
STRATA CONTROL
SUPPORTS
UNDERGROUND MINING