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Coal refuse, also known as coal waste, rock, slag, coal tailings, waste material, rock bank, culm, boney, or gob, is the material left over from coal mining, usually as tailings piles or spoil tips. For every tonne of hard coal generated by mining, 400 kg (880 lb) of waste material remains, which includes some lost coal that is partially ...
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This list of mines in Indonesia is subsidiary to the list of mines article and lists working, defunct and future mines in the country and is organised by the primary mineral output. For practical purposes stone, marble and other quarries may be included in this list.
The History of coal mining goes back thousands of years, with early mines documented in ancient China, the Roman Empire and other early historical economies. It became important in the Industrial Revolution of the 19th and 20th centuries, when it was primarily used to power steam engines, heat buildings and generate electricity.
The Indonesian coal industry is rather fragmented. Output is supplied by a few large producers and a large number of small firms. Top 10 Coal Companies in Indonesia in the industry include the following: [23] [24] PT Bumi Resources Tbk (BUMI) Sinar Mas Mining Group; PT Adaro Energy Tbk (ADRO) PT Indika Energy Tbk (INDY) PT Bayan Resources Tbk ...
The Ombilin Coal Mining Museum at Ombilin Coal Mine Complex presents the history of the company and the tools that were used for mining. Original relics such as the Mbah Soero tunnel, workers and mine workers housing (Tangsi Baru and Field Land), coal filtering, railway factories, government offices, settlements, municipal government are preserved.
The company is an Indonesian energy group that focuses on coal mining through subsidiaries. [2] The principal location is at Tabalong district in South Kalimantan, where the subsidiary PT Adaro Indonesia operates the largest single-site coal mine in the southern hemisphere (roughly 110,000 tons of coal per day). [3]
By 1800, the Dutch East Indies colonial state had emerged and benefited from cash crop trades of coffee, tea, quinine, rubber and palm oil from the colony, also from the mining sector: oil, coal, tin and copper.