Rescuers wait to be transported down the Qianqiu coal mine to carry on rescue operations after a rock burst accident in Sanmenxia, Henan province November 4, 2011. Rescuers lifted seven injured miners to the surface from a coal mine in central China's Henan province after a rock burst Thursday killed four and trapped another 50, local rescue headquarters said Friday, Xinhua News Agency reported.

In these photos released by China's Xinhua News Agency, miner's are carried out of the shaft of the Qianqiu Coal Mine in Sanmenxia City, central China's Henan Province, Saturday, Nov. 5, 2011. Forty-five grimy, exhausted miners trapped by a cave-in were rescued Saturday, ending a 36-hour ordeal in the world's most dangerous country for the industry.

In this photo released by China's Xinhua news agency, rescued miners are helped to walk out of a coal mine after being trapped underground for more than 30 hours at the Qianqiu Coal Mine in Sanmenxia City, Henan province, on Saturday Nov. 5, 2011. Rescuers have pulled 42 more miners to the surface and are searching for several more who were trapped after a cave-in at the coal mine in central China.

Medical personnel attend to a coal miner who was rescued after a rock blast occurred in a mine shaft at the Henan Yima Coal Mine Group's Qianqiu facility, in Yima, in north China's Henan province on November 4, 2011.