Dump leaching is an industrial process to extract precious metals and copper from ores. Dump leaching is similar to heap leaching, however in the case of dump leaching ore is taken directly from the mine and
Mountain operations, like the Hobet 21 mine near Danville, West Xinhaiia, yield one instead of drilling into them, a method known as mountaintop coal removal. . blasted away, the remains dumped in nearby hollows, creating “valley fills.