longwall mining

According to the report, what are some of the risks involved in longwall mining?

The longwall mining operations at the mine began in 1998.

Longwall mining accounts for about 50 percent of underground production.

The mine used the longwall mining technique invented in Britain.

The authority has recently received advice on "the long term potential for damage" from longwall mining, it said.

The basic idea of longwall mining was developed in England in the late 17th century.

Gate roads are driven to the back of each panel before longwall mining begins.

The additional longwall mining system is expected to increase production by 5.0 million to 6.5 million tons per year.

Longwall mining has been around for decades but mine operators have recently made the technique far more efficient.

Longwall mining involves removing a panel of coal along a face up to two kilometres long.

The mine applies longwall mining and currently has an annual production capacity of 3 million tonnes.

The longwall mining technique was adopted widely, and output reached 130 million tons in 1957.

Longwall mining has traditionally been a manual process in which alignment of the face equipment was done with string lines.

Longwall mining looks worse from the surface.

Mining will continue until the coal already developed for longwall mining is depleted.

Their training was related to the introduction of mechanised longwall mining equipment in certain underground mines.

In this context, longwall mining can be classified as a form of retreat mining.

Longwall mining was introduced in the 1960s.

Longwall mining is used wherever coal is present in thick, level seams deep under the ground.

In this interview, Jim Mitchell provides a comprehensive overview of the longwall mining process.

Downtime is a costly aspect of longwall mining.

Longwall mining has been extensively used as the final stage in mining old room and pillar mines.

Safer is longwall mining, in which operators are protected by roof supports that are part of the machine.

Current experience in the current longwall mining supports an average seam thickness of 11 feet 4 inches (3.5m).

A number of specific mining terminology is used in describing certain aspects of longwall mining.