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202333 · Surface/open cast mining and deep underground mining are considered two basic methods for coal extraction globally. The rising trend of coal mining activities has resulted in the accumulation of mining and processing wastes with low carbon levels over the past few decades [6]. Fig. 1 presents different life cycle stages of coal with details of …
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20211125 · India’s semi-planned economy led the prime minister Indira Gandhi to nationalize its coal industry in stages between 1971 and 1973, giving state-owned Coal India Limited and its subsidiaries a monopoly on coal mining until 1993 when the Nationalization Act was amended to allow private companies to undertake coalmining for their own use in ...
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2024312 · Box 9 -- Documents, mine reports and maps, mostly in Colorado (1918-1981). Includes: King Coal Mine. La Plata County, Colorado; and other properties; La Plata Gold Corporation; documents on the civil action Elgin Gas & Oil vs. La Plata Gold Corporation (1961); Bessie G Mine; Fairchild Minerals Inc. Maps, including Liberian …
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202311 · Abstract. The technology of coal mining has gone through continual evolutions and several revolutionary changes which transformed the methods, equipment, and productivity over the decades. In recent years, advances in technology focused more on the use of communication systems, automation, and data sciences for the health and …
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2022119 · In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and overlying and underlying strata. Depillaring is one of the most dangerous phases of underground coal mining. Even after centuries of experience in underground coal mining, there is no well …
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202091 · Also, the coal mining sector could benefit from remote and ground sensing techniques, including the use of unmanned aerial vehicles and hyperspectral imaging for hydrogeochemical investigations. Effective treatment of acid drainage from mine areas reduces material damage, allows resource reuse and recovery, and enables successful …
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2024117 · The Xinjing Open-Pit Coal Mine landslide is situated in the southern region of Helan Mountain (Fig. 1a). This region under experienced aulacogen deposition from the middle-late Proterozoic and to early Paleozoic periods, with the reactivation of ancient faults and rift development in the late Paleozoic, and reverse thrusting and folding uplift since …
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20141010 · Fully mechanized mining (FMM) technology has been applied in Chinese coal mines for more than 40 years. At present, the output of a FMM face has reached 10-million tons with Chinese-made equipment. In this study, the new developments in FMM technology and equipment in Chinese coal mines during past decades are introduced. …
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20231019 · Coal Mining Coal can be extracted from the earth either by surface mining or underground mining. Once coal has been extracted, it can be used directly (for heating and industrial processes) or to fuel power plants for electricity. Surface Mining If coal is less than 61 meters (200 feet) underground, it can be extracted through surface mining.
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