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Demonstration of Longwall Mining in a Steeply Dipping Coal Seam.

Authors
Kennedy-MR; Reschke-LM
Source
NTIS: PB 88-192975 :82 pages
Link
NIOSHTIC No.
10005876
Abstract
This report describes the demonstration of longwall mining in a seam dipping 27 degrees to 34 degrees. 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 for 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 wth mining, but little useful information was gained from the monitoring.
Publication Date
19870101
Document Type
CP; Final Contract Report;
Fiscal Year
1987
NTIS Accession No.
PB88-102975
NTIS Price
A06
Identifying No.
OFR 37-87
NIOSH Division
DRC;
Source Name
NTIS: PB 88-192975
Performing Organization
Snowmass Coal Company
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