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Mining Publication: Fire Protection Provided by Detonator Containers
Keywords: Explosives safety Fire protection Fires
This page is archived for historical purposes and is no longer being maintained or updated. Contact NIOSH Mining if you need an accessible version.
Original creation date: September 1997
Authors: LD Santis
Conference Paper - September 1997
Download PDF Document (1.37 MB)
NIOSHTIC2 Number: 20023706
Proceedings of the 23rd Annual Conference on International Society of Explosives Engineers, 1997 :487-498
The Code of Federal Regulations Title 30, Parts 56, 57, 75, and 77 require that detonators and explosives be separated by four inches of hardwood or equivalents when transported together in mines. This standard was developed to protect the explosives from initiation by the more sensitive detonators. The research reported here is an attempt to quantify the fire protection offered by four inches of red oak and other materials. Boxes with a volume of 6.75 cubic feet were made from four-inch-thick rough green oak (RGO), two-inch thick RGO plied, two-inch thick #1 common (dried) red oak plied, and a metal/plywood composite. These and boxes meeting the Institute of Makers of Explosives' (IME) Safety Library Publication No. 22 were tested in bonfires. The boxes were instrumented with thermocouples, filled with detonators, and placed over a kerosene fire imparting about 16 kilowatts per square meter heat flux for up to 3 hours. Tests showed that the wood boxes protected the detonators for over an hour with variations between the different trials. In the IME 22 container tests, detonators began exploding in as little as 17 minutes in one test and not for 2-1/2 hours in another test. Detonators in the metal/plywood boxes began to explode in about 15 minutes, but with minor alterations, were able to contain the detonators. The test results show that the exterior of an IME 22 container significantly affects its thermal properties. Defects in the form of cracks and the manner in which the container is closed have a significant effect on the performance of a detonator container in a fire.
Image of publication Fire Protection Provided by Detonator ContainersConference Paper - September 1997
Download PDF Document (1.37 MB)
NIOSHTIC2 Number: 20023706
Proceedings of the 23rd Annual Conference on International Society of Explosives Engineers, 1997 :487-498
See Also
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A Century of Bureau of Mines/NIOSH Explosives Research
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Multiple Type Discriminating Mine Fire Sensors
Pressure Monitoring and Observed Effects of Mining at the Oak Grove, AL, Coalbed Degasification Pattern
Smoke, Carbon Monoxide, and Hydrogen Chloride Production from the Pyrolysis of Conveyor Belting and Brattice Cloth
Technology News 497 - "You Are My Sunshine": A New Video Release From NIOSH on the Sunshine Mine Fire
Technology News 549 - MFIRE 3.0 - NIOSH Brings MFIRE into 21st Century
Page last reviewed: June 29, 2015
Page last updated: June 29, 2015
Content source: National Institute for Occupational Safety and Health, Mining Program
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