drift mining

There are many local historical references connected to drift mining.

When the gold was found, the drift mining began.

The use of tunnels for mining is called drift mining.

Typical methods for extraction included drift mining and bell pits.

In 1868, Brown and Godfrey opened a drift mining four miles northwest of town.

By drift mining, miners were able to recover much of the gold buried under the permafrost.

Drift mining is a way of mining where tunnels are dug horizontally.

Coal was then obtained by drift mining, but by the 14th century shafts were used.

Drift mining is the use of drifts to extract ore - in this case the drifts follow the vein.

Mining continued in the town with drift mining in Bamford until 1950.

Drift mining methods were used extensively to mine placer deposits during the early years of the Nome mining district.

The city's economy developed from drift mining for coal in the late 19th century and agriculture in the early 20th century.

Widespread commercial anthracite mining in Wales has now ceased although a few large open cast sites remain, along with some relatively small drift mining operations.

Early work was done by underground drift mining, later work by open-cut methods, and by reworking old tailings.

This drift mining enabled Daw Mill to increase its production capacity as it removed the often time consuming process of winding coal up the shafts.

Von Humboldt also criticized the excavation techniques as being unpractical for future exploitation, recommending drift mining instead, since the halite tunnels don't require beams, lowering the costs.

Drift mining utilizes horizontal access tunnels, slope mining uses diagonally sloping access shafts and shaft mining consists of vertical access shafts.

The Ament Dam, built in 1902 by the Golden Drift Mining Company to provide water for mining equipment, was slightly upriver of Grants Pass.

The Drift mining method was used because of the slope of the land in Beeley Wood and the mines went into the hillside for a long way and to a great depth.

However, Ralph Brandling, the incumbent of the Brandling estate at that time, had come to realise the value of the rich coal deposits on his estate and began drift mining around 1670.

Drift mining is either the mining of an ore deposit by underground methods, or the working of coal seams accessed by adits driven into the surface outcrop of the coal bed.

The coal mining industry burgeoned throughout the Industrial Revolution and into the 19th century, when shafts were sunk to complement the open-cast mining and drift mining already exploiting the ample and obvious coal resources.

Prairie Plant Systems, based in Saskatoon, has used an inactive underground copper/zinc Drift mining owned by the Hudson Bay Mining and Smelting Company to produce approximately 400 kilograms of medicinal marijuana annually.

Prior to that, there was scattered small-scale drift mining and surface mining of coal, but the construction of the first shaft mine ushered in an era which eventually led to as many as 290 significant mines and numerous other small ("dinky") mines in the two counties.

The No. 2 and No. 3 Rhondda house and bituminous coals which outcrop along the valley were quickly proved and the Aber, Caedu and Tynewydd collieries were opened by drift mining driven into the seams from the mountain sides.