Rescue efforts are underway Monday at the Qaidam coal mine in Northwest China’s Qinghai province, after mud flooding of the site killed one and trapped 19 on Saturday. Photo: Zhao Linsong/China News Service, VCG

Rescuers prepare to drill the site Monday to rescue trapped workers in Qaidam. Photo: Qi Zengpei/China News Service, VCG

Rescuers level the ground using an excavator at the coal mine in Qaidam on Monday. Photo: Qi Zengpei/China News Service, VCG

Rescuers cover the ground with waterproof clothes at the coal mine Sunday to prevent water seepage. Photo: Ma Mingyan/China News Service, VCG

Pipes are used to drain away flooded water at the site on Sunday. Photo: Ma Mingyan/China News Service, VCG

Workers drain the water away at the coal mine on Sunday. Photo: Ma Mingyan/China News Service, VCG

Workers spray disinfectant at the coal mine Saturday night to prepare for the rescue. Photo: Ma Mingyan/China News Service, VCG

Rescue personnel stand by at the coal mine Saturday night for the rescue. Photo: Ma Mingyan/China News Service, VCG

Cars from the medical, firefighting, public security, and emergency response departments arrive at the coal mine Saturday night after the accident. Photo: Ma Mingyan/China News Service, VCG

An ariel view of the Qaidam coal mine, which was suspended on Aug. 2, Ying Maowen, deputy head of Haibei prefecture, said at a press conference on Sunday. Photo: Ma Mingyan/China News Service, VCG