History of coal miners inventiveness in clothing their families. Mining has always been dangerous, because of methane gas explosions, roof cave-ins, and the difficulty of mines rescue. The worst single disaster in British coal mining history was at Senghenydd in the South Wales coalfield. On the morning of 14 October 1913 an explosion and subsequent fire killed 436 men and boys. It followed a series of many extensive Mining accidents such as The Oaks explosion of 1866 and the Hartley Colliery Disaster of 1862. Most of the explosions were caused by firedamp ignitions followed by coal dust explosions. Deaths were mainly caused by carbon
Fire rock air and gas to funnel the flame through. Fire rocks come in many different colors and range in sizes from a half-inch to an inch. Fire rock is noted for its ability to withstand high temperatures of direct heat for prolonged periods of time. Unlike river rock, which is non-porous and highly explosive when heated, fire rock is considered a porous substance that is capable of releasing heat through tiny holes in its outer layer. Damp fire rocks have been known to "pop" and throw pea sized pieces of rock as they heat. The moisture that is caught in the