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Comparative Study of Western U.S. Longwall Panel Entry System.

Authors
Haramy-KY; Kneisley-RO
Source
Proc 30th U S Symp on Rock Mech Morgantown West Virginia, 1989 Jun; :125-132
Link
NIOSHTIC No.
10007206
Abstract
This paper summarizes ground control studies of longwall panel entry systems in two western U.S. coal mines. Presented are comparisons of in situ pressure change measurements and assessments of chain pillar and entry behavior under a wide range of cover. Results indicate that no one entry system design is universally applicable, and that site-specific factors need to be considered for panel entry design. Relationships between overburden depth, face advance, and magnitude and location of the forward abutment are discussed for western operations. In addition, analysis indicates that use of yield pillars may reduce or eliminate some stress-related problems that plague longwall panel entry design.
Publication Date
19890601
Document Type
OP;
Fiscal Year
1989
NTIS Accession No.
NTIS Price
Identifying No.
OP 155-89
NIOSH Division
DRC;
Source Name
Proc. 30th U.S. Symp. on Rock Mech., Morgantown, West Virginia, June, 1989; Balkema, 1989, PP. 125-132
State
WV;
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