MSHA links Upper Big Branch mine explosion to dust, methane

摘要

Arlington, VA - Faulty equipment and coal dust likely caused a small methane ignition to turn into a massive explosion that killed 29 miners at Upper Big Branch Mine-South in April, according to preliminary investigation results from the Mine Safety and Health Administration. At a public briefing Jan. 19, MSHA officials said sparks from a cutting tool known as a shearer may have ignited the methane gas. The shearer's water spray system was supposed to control coal dust and sparks, but MSHA said some sprays were missing or not working properly.