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©Encyclopedia of Life Support Systems (EOLSS) COAL, OIL SHALE, NATURAL BITUMEN, HEAVY OIL AND PEAT – Vol. I - Coal Exploration and Mining - Lixun Kang 1.3.2 Field mapping techniques Geological mapping is a necessary starting point for the fieldwork of coal exploration.
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©Encyclopedia of Life Support Systems (EOLSS) COAL, OIL SHALE, NATURAL BITUMEN, HEAVY OIL AND PEAT – Vol. II - Mining of Oil Shale - Ingo Valgma and Jialin L. Qian About 85% of oil shale mined is used for burning in oil shale power stations; 12% for retorting for obtaining shale oil; about 3% for cement factories.
©Encyclopedia of Life Support Systems (EOLSS) Figure 2. Change in production and productivity of US coal mines The higher productivity for open pit mining equipment also lowers costs. The necessary underground equipment for maintaining productivity is more expensive on a unit basis capacity than corresponding open pit equipment.
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CIVIL ENGINEERING – Vol. II - Underground Mining Methods and Equipment - S. Okubo and J. Yamatomi ©Encyclopedia of Life Support Systems (EOLSS) 2. Strength of the hanging wall, footwall, and ore body. 3. Economic value of the ore and grade distribution within the deposit.
Jul 21, 2016· Underground mining is the process of extracting minerals and ores that are located too far underground to be mined efficiently using surface mining methods. The primary objective of underground mining is to extract ore safely and economically while minimizing handling of waste rock.
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In every underground mining facility, each component of the shaft must be able to carry out its respective functions efficiently for the whole operation to succeed. Among the components of note are the skips.
Mining is an industry that pushes the envelope in engineering, and things get even more extreme when it comes to underground mining. The use of underground mines is necessary for excavating at depths greater than 60 metres (the point where surface mining turns inefficient).
Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds. Soft rock mining refers to excavation …
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