EXCAVATIONS IN FROZEN GROUND. CRITICAL DEPTH SHOTS (100 AND 500 LB) IN FORT CHURCHILL TILL.

Tests were conducted from February to March 1956 at Fort Churchill (Canada) to determine if the critical depth curve obtained earlier for small charges (0.5-20 lb) could be extrapolated for larger charges. The results, based on firings of three 100-lb and four 500-lb charges of Atlas 60% gelatin dyn...

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Bibliographic Details
Main Author: Benert,Robert
Other Authors: SNOW ICE AND PERMAFROST RESEARCH ESTABLISHMENT WILMETTE ILL
Format: Text
Language:English
Published: 1961
Subjects:
Snow
Ice and Permafrost
(*EXPLOSIVE CHARGES
MATHEMATICAL PREDICTION)
(*EXPLOSIVES
CRATERING)
DRILLING
MAPPING
SILT
CRACKS
EXPLOSIONS
ROCK
PERMAFROST
Canada
Fort Churchill
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0652715
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0652715
Description
Summary:Tests were conducted from February to March 1956 at Fort Churchill (Canada) to determine if the critical depth curve obtained earlier for small charges (0.5-20 lb) could be extrapolated for larger charges. The results, based on firings of three 100-lb and four 500-lb charges of Atlas 60% gelatin dynamite, indicate that the definition for critical depth must be revised for the larger charges if the extrapolation is to be valid.

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