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Elastic Stress Wave Propagation in Underground Hardrock Mining.

Authors
Ligon-JB; Whipple-RL
Source
For Reference Only At Bureau Libraries :218 pages
Link
NIOSHTIC No.
10003890
Abstract
Blast-induced stress waves propagating along the surface of a drift of an underground hard-rock mine were recorded and analyzed. Resistance strain gauges, accelerometers, and a velocity pickup were used to make the measurements. Although a full face blast was recorded, the stress waves were initiated by single borehole blasts for the majority of the project. A special instrument trailer was designed, constructed, and utilized during the project. A reliable strain wave transducer was developed to measure the stress waves propagating on the drift surface. A correlation study between strain and acceleration signals for p-waves was made that agreed well with theory. The use of stemming was found to reduce strain and acceleration magnitudes as predicted.
Publication Date
19830101
Document Type
CP; Final Contract Report;
Fiscal Year
1983
NTIS Accession No.
NTIS Price
Identifying No.
OFR 115-84
NIOSH Division
WO;
Source Name
For Reference Only At Bureau Libraries
State
MI;
Performing Organization
Mi Tech. Univ.
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