Report of Investigation: Underground Coal Mine Explosion, Greenwich Collieries No. 1 Mine, I.D. No. 36-02405 : Greenwich Collieries Division of Pennsylvania Mines Corporation, Green Township, Indiana County Pennsylvania, February 16, 1984
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14 crosscut air quantity approximately battery-powered locomotive belt bleeder entries brattice cap lamp carbon monoxide CD CD CD cfm of air check curtains circuits and equipment CM CM CM Coal Mine Safety coke connecting line rooms cut-through D-3 areas D-3 entries D-3 vacuum circuit D-5 section D-l and D-3 damaged demand valve Depto electrical arcing enclosure Endler energized entry of D-3 evidence of electrical Examination and testing explosion occurred February 16 five-circuit distribution box flatcar Greenwich Collieries high-voltage circuit ignition source inby indicated L2 entry Labour pump installation located Main D return mercury switch methane concentration methane detector miners motor MSHA investigators concluded Number operation overcast Parzatka phase conductor portable power center provided the ignition pump starter receptacle roof Safety and Health short circuit stoppings switch t_ t_ t_ three-phase power tram control vacuum circuit breaker volume percent