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Ground Control in Multi-level Room and Pillar Mines.

Authors
Pariseau-WG
Source
NTIS: PB/83-252965 :122 pages
Link
NIOSHTIC No.
10003075
Abstract
This research is concerned with ground control in multiseam mining and relates mainly to the analysis of stress about multiseam room- and-pillar mines. The two variables of most concern are distance between seams and alignment of the pillars between seams. The first efforts of the investigation apply to the development phase of mining when the extraction is typically less than 50%. The second efforts are concentrated on retreat mining and barrier-pillar safety when the extraction is typically greater than 50%. The procedures in both cases are readily applicable to more than two seams. Although two-seam mines are the most frequent type of multiseam operations, because of the potential for three-seam operations in the western United States, a number of three-seam development analyses are also presented.
Publication Date
19830101
Document Type
CP; Final Contract Report;
Fiscal Year
1983
NTIS Accession No.
PB83-252965
NTIS Price
A07
Identifying No.
OFR 150-83
NIOSH Division
WO;
Source Name
NTIS: PB/83-252965
State
UT;
Performing Organization
Univ. of Utah
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