A coal mine fire trapped 28 miners in north China on Monday, the latest accident to hit the world's deadliest mining industry, state media reported. More than 60 miners were working underground at Fengfeng coal fields in Hebei province, one of China's coal production bases, when the fire broke out at midday, Xinhua news agency said. Last year, 3,300 gas blasts, floods and other accidents killed nearly 6,000 miners across China, according to official figures. Collieries are struggling to meet booming demand for coal, which fuels about 70 percent of the nation's energy consumption, but regularly flout safety rules in their rush for profits, Reuters reported.