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. It was reported that 16 miners died from carbon monoxide poisoning, while three others died in hospital.