twenty - nine other mine were working at the nearby kangjiayao quarry at the period of the accident , although it is unclear if any of those miners were infected . thousands of workers perished in mining hazards each november in china . tonight ' s accidents comes just one day after 19 coal miners were killed in a mining tragedy in the sulongsi mine in hangzhou , and another month after the largest collision in contemporary history was 214 miners , in daqing , liaoning province .
Liaoning Province is in China.