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A Model for the Determination of Flyrock Range as a Function of Shot Conditions.

Authors
Roth-J
Source
NTIS: PB/81-222358 :97 pages
Link
NIOSHTIC No.
10002095
Abstract
Flyrock is the source of most of the injuries and property damage in a majority of blasting accidents in surface mines. A quantitative correlation between shot conditions and maximum flyrock range can be used to define a blasting area in which no personnel or equipment should be present during a shot. The approach used was to develop a model that correlates shot conditions and initial flyrock velocities and permits computation of flyrock range from ballistic trajectories. The gurney formula for velocity of explosively propelled plates or fragments was adapted to explosively propelled flyrock from vertical rock faces or from bench tops. The modified gurney formula was then calibrated with measured flyrock velocities from mining and explosives literature. Charts were then developed for possible field use that gives maximum flyrock range as a function of shot conditions.
Publication Date
19790101
Document Type
CP; Final Contract Report;
Fiscal Year
1979
NTIS Accession No.
PB81-222358
NTIS Price
A06
Identifying No.
OFR 77-81
NIOSH Division
PRC;
Source Name
NTIS: PB/81-222358
Performing Organization
Management Science Associates
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