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Development of a Borehole Device to Determine the Modulus of Rigidity of Coal Measure Rocks.

Authors
Hustrulid-WA
Source
NTIS: PB/209-548 Available for Reference At Bureau Libraries :119 pages
Link
NIOSHTIC No.
10000927
Abstract
This report describes a simple borehole device to determine the modulus of rigidity (g) of rock, which was developed and successfully tested in the laboratory and in the field. The mathematical analysis required to interpret the results was also developed. In the laboratory tests very good agreement was observed between the known values of g and those determined experimentally for both metal and rock cylinders. Field testing was done at the Colorado School of Mines experimental mine at Idaho Springs, Colorado, and at the No. 4 Coal Mine of the Mid-Continent Coal and Coke Corp. near Carbondale, Colorado.
Publication Date
19710101
Document Type
CP; Final Contract Report;
Fiscal Year
1971
NTIS Accession No.
PB-209548
NTIS Price
A07
Identifying No.
OFR 12-72
NIOSH Division
DRC;
Source Name
NTIS: PB/209-548; Available for Reference At Bureau Libraries
State
CO; ID;
Performing Organization
Colorado School of Mines
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