safety regulations for coal mines

On Saturday night, about 9 p.m., a short, sharp explosion rattled one of Russia's largest coal mines, a deep maze of underground tunnels located in Siberia. About 370 miners were working at the time. Most of them came hurrying out of mine entrances. But not all. Managers organized rescue teams and sent about 50 people back into the Raspadskaya mine to hunt for survivors - and bodies. In the best of circumstances - which would not be in the panic of an emergency, in the middle of the night - this would be a daunting task. The mine's tunnels (an estimated 200 miles worth) plunge…