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Rock Breakage Performance Characteristics of (1) Small Diameter Confined Explosive Column Charges and (2) Water Jets.

Authors
Ash-RL; Summers-DA
Source
NTIS: PB/237-217 Available for Reference At Bureau Libraries :101 pages
Link
NIOSHTIC No.
10001697
Abstract
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.
Publication Date
19730101
Document Type
CP; Final Contract Report;
Fiscal Year
1973
NTIS Accession No.
PB-237217
NTIS Price
A07
Identifying No.
OFR 55-74
NIOSH Division
TCRC;
Source Name
NTIS: PB/237-217; Available for Reference At Bureau Libraries
State
MO;
Performing Organization
University of Missouri
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