Development of Roof Control Techniques for Massive Roof Problems in Longwall Operations.
Debakker-P; Harvey-A; Cleary-M; Hawkes-TM
NTIS: PB/81-125270 :191 pages
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.
CP; Final Contract Report;
NTIS Accession No.
Foster-Miller Associates, Inc