Russian mining company, Mechel OAO (MTL) temporarily halted operations at its Sibirginskaya mine due to high gas levels in a mined-out area. Mining works at the site were halted and all miners returned to the surface. Luckily, no carbon monoxide was detected in the long wall 3-1-9′s active mine-working. The mine’s experts are working on [...] (MTL) Mechel OAO Halts Mine Operations