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2. Engineer Research and Development Center (ERDC)
3. Cold Regions Research Engineering Laboratory (CRREL) - (2/1/1961 - present)
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5. Technical Report

Title:	Controlled perimeter blasting in cold regions
Authors:	United States. Naval Support Force, Antarctica Mellor, Malcolm
Keywords:	Cold regions Controlled perimeter blasting Docks Explosives Explosive effects Ice Blast effects Pre-split blasting Ice blasting Smooth blasting McMurdo Sound, Antarctica
Publisher:	Cold Regions Research and Engineering Laboratory (U.S.) Engineer Research and Development Center (U.S.)
Series/Report no.:	Technical report (Cold Regions Research and Engineering Laboratory (U.S.)) ; 267.
Description:	Technical Report Abstract: The general principles of pre-split blasting and smooth blasting are described and practical procedures that have been developed for work in common rocks are reviewed systematically. The topics covered include shothole spacing, charge weight per unit length of shothole, decoupling ratio, adjustments for explosive type and rock type, and weight of explosive per unit face area. Relevant properties of frozen rocks, frozen soils, and ice are compared with those of common unfrozen rocks, and appropriate adjustment of blast design is discussed. Interim relationships for the design of controlled perimeter blasting in frozen soils and massive ice are put forward, recognizing that additional experimentation is required. Special problems in controlled blasting of ice are discussed. These include effects of wet holes, delayed removal of burden, and submerged burden. Special attention is given to the cutting of ice islands and icebergs. An Appendix describes an operation in which the face of the ice wharf at McMurdo Sound was trimmed by pre-split blasting.
Rights:	Approved for public release; distribution is unlimited.
URI:	http://hdl.handle.net/11681/5649
Appears in Collections:	Technical Report