China's Xinjiang region is facing underground flooding in the Fengyuan coal mine in Hutubi County. The flood which has trapped 21 miners occurred on Saturday evening, state media reported.<br />''<br />'' It added eight of the 29 miners working at the location had already been rescued.<br />''<br />'' Staff were carrying out upgrading works at the site when disaster struck. <br />''<br />'' Rescuers have been trying to pump water out of the flooded shaft while simultaneously pumping air into the mine.<br />''<br />'' Coal mines in China are among the world's most dangerous, with explosions and gas leaks a regular occurrence.<br />''<br />'' Mining accidents in eastern Shandong province in January and the southwest city of Chongqing in December killed more than 30 miners.<br />