— A pressure-relief mining technology without advanced tunneling and coal pillars (PRMT) for longwall mining that can reduce roadway tunneling, reduce coal loss and improve roadway stability has been proposed in China (Wang et al. Citation 2020).

Coal focuses on the research and development needs and priorities in the areas of coal resource and reserve assessments, coal mining and processing, transportation of coal and coal products, and coal utilization.

In fact, reliable and robust cables are most essential for efficient coal production. Moreover, these mining cables should conform to the earthing regulations, namely, that the conductance of the earthing conductor should be at least 50 per cent of that of one of the power conductors.

 — Surface coal mining generally involves the following sequence of unit operations: (1) clearing the land of trees and vegetation, (2) removing and storing the top layers of the unconsolidated soil (topsoil), (3) drilling the hard strata over the coal seam, (4) fragmenting or blasting the hard strata with explosives, (5) removing the blasted ...

Coal Mining Methods (cont.) Underground mining methods: room and pillar mining – coal is extracted by driving a series of entries (rooms) that are connected periodically by perpendicular entries (cross-cuts). The blocks of coal that remain between the entries and cross-cuts are known as pillars.

 — Coal mining, extraction of coal deposits from the surface of Earth from underground. Coal has been used since the Bronze Age, 3,000 to 4,000 years ago, and was the basic energy source that fueled the Industrial …

 — The old Coal cableway centre (Taubanesentrale) in Longyearbyen was used to transport coal from the mines to the harbour. Today, it is a prominent landmark and an important part of Longyearbyen's local history, which is strongly connected to coal mining.

Inland, just 12 km from Sullivan mine, at the far end of the 7.7 km cableway, Coalcorp surface-mines a licence area of 2300 hectares. There, often in extreme condi­tions, miners hew at an estimated 30 million tonnes of coal.

Coal can be transported from mines and processing plants to consumers in several different ways: Conveyors, trams, and trucks move coal around mines, for short distances from mines to that are consumers close to the mines, or …

 — The Grosvenor mine produced 2.8 million metric tons of metallurgical coal in 2023, making up 17% of Anglo's coal output, according to its annual report. The company is the world's third ...