Rescuers enter the Xiaojiawan Coal Mine in Panzhihua City, southwest China's Sichuan Province, Sept. 3, 2012. The death toll of last Wednesday's colliery blast in Panzhihua has climbed to 45. (Xinhua/Deng Liangkui)

A rescuer registers on a chart before entering the Xiaojiawan Coal Mine in Panzhihua City, southwest China's Sichuan Province, Sept. 3, 2012. The death toll of last Wednesday's colliery blast in Panzhihua has climbed to 45. (Xinhua/Deng Liangkui)

Resucers get ready to enter the Xiaojiawan Coal Mine in Panzhihua City, southwest China's Sichuan Province, Sept. 3, 2012. The death toll of last Wednesday's colliery blast in Panzhihua has climbed to 45. (Xinhua/Deng Liangkui)

A rescued miner receives treatment in a hospital in Panzhihua City, southwest China's Sichuan Province, Sept. 3, 2012. The death toll of last Wednesday's colliery blast in Panzhihua has climbed to 45. (Xinhua/Deng Liangkui)