underground mining in a sentence

• And he said the Asarco underground mine has been inspected this year.
• The primary underground mining method used was known as cut and fill.
• The last underground mining took place at the Reed Mine in 1912.
• To maintain output, the enterprise would need to develop underground mining significantly.
• There are no active underground mines in Clearfield County as of 2007.
• For underground mines, rehabilitation is not always a significant problem or cost.
• If underground mine tunnels collapse, they cause subsidence of the ground above.
• The underground mine was finally closed and allowed to flood in 1999.
• McKay said the project was an underground mine, not an open pit.
• The underground mines are mostly idle, except for a few small operations.
• It's difficult to see underground mining in a sentence .
• In 2000, 156 were killed, including 112 in underground mines, he said.
• There are also underground mine complexes in the vicinity of the stream.
• Pre-production construction of the underground mine commenced in early to mid 2006
• As mining properties at stopes of underground mining to the open pit.
• Many of the underground mines in Streator closed during the 1920s.
• Mist Mountain coal generally has a low sulphur content and underground mining methods.
• In the past, underground mine fires have also been a threat.
• Thompson said with the authority of a gray-bearded retiree from Appalachia's underground mines.
• Another ore body is proposed to be exploited using underground mining.
• There were also at least six underground mines in the valley.