Two separate explosions at coal mines in Yunnan and Hunan on 17 May killed 15 miners, according to Chinese media reports. The first explosion, which killed at least eight miners, occurred on Tuesday morning at the Golden Bamboo Mountain mine in Hunan...Less than 12 hours later, a gas and coal dust explosion at the Nanfeng mine in Yunnan killed seven miners...The cause of the explosions at both mines is being investigated, and the mine owners have reportedly been detained…