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Development of Roof Control Techniques for Massive Roof Problems in Longwall Operations.

Authors
Debakker-P; Harvey-A; Cleary-M; Hawkes-TM
Source
NTIS: PB/81-125270 :191 pages
Link
NIOSHTIC No.
10001011
Abstract
The objective of this investigation was to design a mechanical roof- breaking device suitable for breaking massive roof and for use with the general range of roof support equipment in longwall operations. Given the state-of-the-art in rock mechanics of the loading requirements to break off massive overhung roof in a longwall operation, two different roof-breaker mechanisms were developed. The most popular roof supports were evaluated for their suitability to be equipped with either of the two mechanisms. The results indicate that the state-of-the-art rock mechanics is not sufficiently advanced to confidently predict roof breakage.
Publication Date
19790101
Document Type
CP; Final Contract Report;
Fiscal Year
1979
NTIS Accession No.
PB81-125270
NTIS Price
A10
Identifying No.
OFR 115-80
NIOSH Division
TCRC;
Source Name
NTIS: PB/81-125270
Performing Organization
Foster-Miller Associates, Inc
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