The Xiaojiawan coal mine disaster was a mining accident which happened on 29 August 2012 at the Xiaojiawan coal mine (Chinese: 肖家湾煤矿), located in Panzhihua in Sichuan Province, China. It was the deadliest mine accident since the 2009 Heilongjiang mine explosion. As a result of a gas explosion in the Xiaojiawan coal mine, at least 45 miners were killed and 1 was still missing as of September 2. 51 were sent to hospital with seven in critical condition.[2] It was reported that 16 miners died from carbon monoxide poisoning, while three others died in hospital.[3]