Coal Mining Methods Underground Mining Longwall & Room and Pillar Mining Longwall mining and room-and-pillar mining are the two basic methods of mining coal
Open cast mining is a type of , The two main methods used for coal extraction are surface mining and underground mining The methods used to extract coal .
OPEN CAST MINING METHOD Open Cast Mining Method • Open cast mining is a surface exploitation method, used mainly for coal It resembles open pit mining
When coal seams are near the surface, it may be economical to extract the coal using open cut (also referred to as open cast, open pit, mountaintop removal or strip) mining methods
Augering can be regarded as a supplementary method for open cast mining in cases when coal seams in the highwall would , Surface Mining Methods and Equipment - J .
Over 7269 million tonnes (Mt) of hard coal are currently produced worldwide and 787 Mt of lignite Coal is mined by two methods: surface or 'opencast' mining, and underground mining