Five persons were found dead after part of an open cast coal mine caved in, in Dhanbad district of Jharkhand. Officials said the deceased persons had illegally entered the open cast mine located at the Eastern Coalfields Limited (ECL) in Mugma.
Open cast mining is a traditional ‘cone-shaped’ excavation done for surface mining of coal that does not deep shafts.
Open-pit mining, also known as open-cast or open-cut mining and in larger contexts mega-mining, is a surface mining technique of extracting rock or minerals from the earth from an open-air pit, sometimes known as a borrow.
This form of mining differs from extractive methods that require tunnelling into the earth, such as long wall mining. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the surface.