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Geotechnology in Slate Quarry Operations.

Authors
Moebs-NN; Sames-GP; Marshall-TE
Source
BoM, 1986 :38 pages
Link
NIOSHTIC No.
10004989
Abstract
This report summarizes a Bureau of Mines study on the use of geotechnology to identify and reduce ground control hazards at slate quarry operations in eastern Pennsylvania. The major ground control hazard is falling rock, attributed to weathered bedding plane faults, which weaken quarry highwalls. It was demonstrated that these faults can be detected outside of the quarry perimeter using surface resistivity measurements. Falls of ice from quarry highwalls constitute a second major hazard, which requires water diversion as a basic control method. In situ stresses seemingly cause only minor problems in slate extraction although they could interact with developed stresses and lead to failure of barriers between quarries. Pull tests showed that rockbolts anchor firmly in slate and should prove effective in securing loose rock.
Publication Date
19860101
Document Type
IH; Report of Investigations
Fiscal Year
1986
NTIS Accession No.
NTIS Price
Identifying No.
RI 9009
NIOSH Division
PRC;
Source Name
Bureau of Mines
State
PA;
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