Accident Report Detail

Accident Summary Nr: 14500268 - METHANE EXPLOSION LEADING TO CARBON MONOXIDE OVEREXPOSURE

Accident Summary Nr: 14500268 -- Report ID: 0523400 -- Event Date: 11/10/1988
Inspection Nr	Date Opened	SIC	NAICS	Establishment Name
103466744	11/10/1988	1623	0	S. A. Healy Co., Inc.

Abstract: Methane gas was detected in a 40-foot-deep tunnel that was under construction. The mining machine was automatically shut down, and all the employees were evacuated. Ten minutes later, three employees entered the area to determine if the atmosphere in the tunnel was safe for reentry. An explosive mixture of methane gas had developed in the air. Apparently, the grout pump ignited the gas and caused an explosion. The three employees were badly burned, and they died of asphyxiation due to overexposure to carbon monoxide.

Keywords: BURN, TUNNEL, ENTRY PERMIT, EXPLOSION

Employee Details
Employee #	Inspection Nr	Degree of Injury	Nature of Injury	Occupation
1	103466744	Fatality	Asphyxia	Occupation not reported
2	103466744	Fatality	Asphyxia	Occupation not reported
3	103466744	Fatality	Asphyxia	Occupation not reported

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