Skip to content

Close Call Graphic Department of Labor
Mine Safety and Health Administration

June 2000

Explosives Accident

MisFire SceneA serious explosives accident occurred recently at a District 8 area mine. The accident involved a new shaft and slope sinking project under development by a mining construction company. The accident occurred when one of the construction workers, utilizing an air drill, struck an apparent misfire from a previous day's shot. The non -detonated portion of the explosive charge consisted of one eight inch stick of blasting powder. Five construction workers were in the shaft when the blast occurred. Three persons sustained injuries from the force of the blast. Two men were treated at a local hospital, kept overnight, and released the next day. The third man received multiple injuries and remains in the hospital after undergoing surgery.
Shaft Top


  • Make adequate examinations for hazardous conditions in all workplaces prior to beginning any work.
  • Tests for methane must be performed immediately prior to firing any shots.
  • A qualified person should perform adequate and thorough examinations for misfires immediately after the blasting area has cleared.
  • When misfires occur, only work by a qualified person to dispose of the misfire, or to protect persons in the affected area should be performed.
Return to Close Call/Info-Gram Index Page

District 8 Home Page

This information was provided by concerned miners in an effort to eliminate accidents. Accident or "close call" information within District 8 may be shared by contacting the MSHA office at (812) 882-7617.