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Secondary explosion hazards during blasting in oil shale and sulfide ore mines.

Authors
Weiss-ES; Cashdollar-KL; Sapko-ML; Bazala-EM
Source
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9632, 1996 Nov; :1-61
NIOSHTIC No.
20000772
Abstract
The data presented in this report are the results, to date, of an ongoing research program on the explosion hazards associated with blasting operations in noncoal mines. Tests conducted at the cannon gallery at Lake Lynn Laboratory near Fairchance, Fayette County, PA, provided a means of evaluating the relative incendivity characteristics of new and existing explosive products. Three explosives-- a pumpable emulsion-ANFO blend, a packaged water gel, and an emulsion blasting agent-exhibited low-incendive qualities compared with other more highly incendive products such as ANFO and some dynamites. Based on the data collected during numerous full-scale blasts in oil shale and sulfide ore mines, the low-incendive products significantly reduced or eliminated the ignition hazards while at the same time providing effective fragmentation of the rock. Based on the positive results from the gallery and field testing, low-incendive explosives, coupled with good blasting procedures, show promise in reducing dust and/or gas ignitions associated with blasting operations in oil shale and sulfide ore mining applications.
Keywords
Mining-industry; Explosions; Explosive-dusts; Ignition-sources; Combustibility
Publication Date
19961101
Document Type
Report of Investigations
Fiscal Year
1997
NTIS Accession No.
PB97-127658
NTIS Price
A05
Identifying No.
RI-9632
ISSN
1066-5552
NIOSH Division
PRL
Source Name
Pittsburgh, PA: U.S. Department of the Interior, Bureau of Mines, RI 9632
State
PA
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