Bull Mountain coal mine closed pending probe of 3 roof collapses
July 27, 2011
Signal Peak’s Bull Mountain underground coal mine has been closed by the Mining Safety and Health Administration so that the mine has time to install additional roof supports in response to roof collapses that occurred on July 18, July 22 and July 25. “Mining may resume on a limited basis once the areas of greatest concern have been re-supported while they install even more support,” said Amy Louviere, a public-relations officer with MSHA.
Two of the three falls occurred in a new section of the mine that is 800 feet down, about twice the depth of previous mining. The first fall dropped a length of 100′ of roof, and the second extended that by 20′. Both were about 600′ away from the longwall machine, the machine that actually breaks the coal away from the surrounding rock. A third was about four miles away. According to John DeMichiei, CEO of Signal Peak, thinks the falls were caused by the weight of the rock above the area being mined as well as the “rock mechanics”. While no miners were hurt in any of the three collapses, one miner was hurt installing the additional roof supports.
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