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Optimization of Supplemental Support for Open-entry Longwall Equipment Recovery.

Authors
Listak-JM; Bauer-ER
Source
Proceeds of 1989 :20-27
Link
NIOSHTIC No.
10011468
Abstract
This report describes a study, conducted jointly by Bethenergy Mines, Inc., and the Bureau of Mines, to assess the effects of longwall front abutment loading on various supplemental support materials utilized in a predriven recovery room. The purpose of the predriven recovery room is to reduce longwall equipment transfer time by eliminating the premove preparation associated with conventional recovery methods. In addition, the room provides a large area in which face salvage equipment can maneuver. Results of four recovery-room study areas show the progression and influence of the front abutment on the longwall panel and supports and their subsequent behavior. The best performance (i.e., the support that most facilitated recovery) of support material was achieved through the use of a concrete mixture that had a sand content of 35 pct by volume. The longwall transfer time was reduced by 30 pct, which translates to a production advantage of 37,000 raw tons of coal per panel.
Publication Date
19890101
Document Type
OP;
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Identifying No.
OP 218-92
NIOSH Division
PRC;
Source Name
Proceeds of 1989 Longwall USA, 6/19-22/89. Industrial Presentations, Inc., PP. 20-27
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