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Rock Breakage Performance Characteristics of (1) Small Diameter Confined Explosive Column Charges and (2) Water Jets.
NTIS: PB/237-217 Available for Reference At Bureau Libraries :101 pages
This report (Grant No. G0122117) was written in two sections and describes the results of experimental work (1) using ammonium nitrate-fuel oil (AN-FO) in explosive charge columns with diameters of 2 inches or less and (2) on rock breakage by water jets on oriented cores of Barre granite. The explosives research shows that AN-FO can be successfully detonated in holes as small as 1/2 inch in diameter. The water jet research indicates that three to four times more rock can be removed by using the most preferred orientation of the traversing jet in relation to microfissures in Barre granite compared with the volume of rock removed using the least preferred rock orientation.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/237-217; Available for Reference At Bureau Libraries
University of Missouri
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division