Accession Number : AD0652715
Title : EXCAVATIONS IN FROZEN GROUND. CRITICAL DEPTH SHOTS (100 AND 500 LB) IN FORT CHURCHILL TILL.
Descriptive Note : Technical rept.,
Corporate Author : SNOW ICE AND PERMAFROST RESEARCH ESTABLISHMENT WILMETTE ILL
Personal Author(s) : Benert,Robert
Report Date : JAN 1961
Pagination or Media Count : 13
Abstract : 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.
Descriptors : (*EXPLOSIVE CHARGES, MATHEMATICAL PREDICTION), (*EXPLOSIVES, CRATERING), DRILLING, MAPPING, SILT, CRACKS, EXPLOSIONS, ROCK, PERMAFROST
Subject Categories : Snow, Ice and Permafrost
Distribution Statement : APPROVED FOR PUBLIC RELEASE