China : Work crews trying to find 47 people missing after a collapse at an open-pit mine in northern China have had to change their excavation methods to avoid causing more landslides, state media reported Friday.
With a large collapsed area at the mine, the digging done by backhoes and bulldozers can risk more collapses. The crews are excavating by layers and making trapezoid-shaped descents to carry on their search from both sides of the mountain in an adjustment of their rescue plans, the report said.
On Friday, heavy machines were seen working on the top level of the collapsed site, searching for trapped vehicles and missing persons.
The initial cave-in of one of the pit’s walls occurred at about 1 p.m. Wednesday, burying people and mining trucks below in tons of rocks and sand. A brief video of the collapse posted on the website of the Beijing Times showed a massive wall of reddish dirt or sand rushing down a slope onto mining vehicles moving below.
