The blast occurred at 2:17 am while 436 employees of the Tunlan Coal Mine were at work underground in Gujiao city, 60 km west of Taiyuan, capital of the coal-rich province.

• 这起矿难事故发生于当天凌晨2时17分，事故发生在山西省古交市的屯兰煤矿，当时时井下有436名矿工正在工作。古交位于太原往西60公里。