Underground mining seems to have started around the 12th century.

He later turned to underground mining, and then to his government post.

Eventually by May 1948 all underground mining had been completed.

Most would need to be extracted by underground mining, however.

Later on they had one of the best cutting machines in underground mining.

Production has come from underground mining and the development of small open pits.

Much of the new surface and underground mining equipment is remote control.

Underground mining continued at a variety of locations around the pass until 1951.

The primary underground mining method used was known as cut and fill.

Underground mining in 2012 is expected to reach approximately 1.0 million tonnes.

Only where larger companies developed underground mining did towns survive.

It was also about reshaping the company's approach for underground mining.

We have also made great strides in developing our underground mining operations.

The goal is to enable underground mining operations to advance further.

Playing these games allowed them to release tensions from hard, dangerous work like underground mining.

In Waihi we are used to the images of early underground mining.

I have found a large group of survivors in a deep, underground mining area on the fourth planet.

Both open pit and underground mining is conducted at these mines.

Work continues at significant pace to prepare the mine site for underground mining.

Another ore body is proposed to be exploited using underground mining.

He established the Elphinstone group of companies in 1975 to provide services to the underground mining industry.

Later, the tubil also found extensive use in underground mining.

With those deals done, it will be able to serve about 35 per cent of the underground mining equipment market.

In the 1930s gold opened up the area and underground mining was carried out on a fairly large (for those days) scale.

Nevertheless, deep underground mining continues to the present date with a single main mine operating.