List of Articles Mining activities

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  1 - The novel disposal methods of solid wastes of a mining and milling operation with emphasise on Codisposal technology
  Ali Behnamfard Salman Ghasemi
  The solid waste materials produced during mining activities can be divided into two categoriesof waste rock and tailing. The waste rock must be removed and placed in a dump to mine the ore. The waste rock dump is heterogeneous in terms of structure and grain size. The w More

  The solid waste materials produced during mining activities can be divided into two categoriesof waste rock and tailing. The waste rock must be removed and placed in a dump to mine the ore. The waste rock dump is heterogeneous in terms of structure and grain size. The waste rock may range in size from less than 0.1 mm to greater than 1 m in diameter. Tailing is said to the material which is discarded after ore processing. The tailing has usually a small particle size distribution and high water content which results in a poor mechanical stability. It may also contains heavy metals and different process reagents which probably toxic to biota in an ecosystem. Hence, they must be disposed of in certain locations with implementing safety issues. In this article, the conventional and novel disposal methods including tailing dam disposal, backfilling, in-pit disposal and submarine disposal have been introduced. Furthermore, the novel codisposal method which uses the open void space in waste rock for disposal of the tailing has been introduced and its advantages have been listed. Then, the relevant parameters for the evaluation of the applicability of this method have been introduced and different techniques for mixing of two solid wastes in this method have been mentioned and a case study has been reported. Considering to the high benefits, codisposal method can be applied in different mine sites in our country. Manuscript profile
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  2 - Ancient Gold Mining Activities in India - An Overview
  A.K. Grover M.K. Pandit
  Gold was obtained through washing or panning of the river sands during initial periods of civilisation. With the advent of knowledge of metallurgical processing of ores it was recovered through mining of in-situ quartz reefs, and then from auriferous sulphide ores. The More

  Gold was obtained through washing or panning of the river sands during initial periods of civilisation. With the advent of knowledge of metallurgical processing of ores it was recovered through mining of in-situ quartz reefs, and then from auriferous sulphide ores. The metal mining activities are evidenced in the form of large number of ‘ancient metal mines’ or ‘old workings’ and ‘placer mining sites’ almost in all the States of India. Gold artefacts have been found in Early Harappan sites. Some of the ancient gold mines are found to be more than 200 metres deep, probably the deepest of that period in the world. Geological surveys, investigations and explorations initiated during nineteenth century, are being continued mainly by the field officers of Geological Survey of India in different parts of the country to locate the gold prospects i.e. past and the future. Ground geological and archaeological findings related to gold have been brought out by several workers. The voluminous data existing on the ancient gold mining activities has been synthesized here for an overview. Manuscript profile
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  3 - Assessment of Environmental Effects due to Mining Activities and Examining Solutions to Exposure with it
  Somayeh Baharlouei Yancheshmeh
  Mining activities lead to the production of large amounts of heavy metals such as lead (Pb), zinc (Zn), arsenic (As), cadmium (Cd) and nickel (Ni). Concentrations higher than the standard values will have harmful effects on the environment and the normal functioning of More

  Mining activities lead to the production of large amounts of heavy metals such as lead (Pb), zinc (Zn), arsenic (As), cadmium (Cd) and nickel (Ni). Concentrations higher than the standard values will have harmful effects on the environment and the normal functioning of systems and organisms where these elements accumulate. One of the major destructive results of these activities is the contamination of underground water due to the accumulation of mine tailings. If the tailings are not properly controlled and managed, their harmful substances enter the surface and underground waters and pollute the area. In last years, the use of biotechnology achievements and especially microorganisms in order to remove heavy metals and their compounds has been very effective. Depending on the intensity of pollution, the cell structure of these microorganisms may be changed to the extent that they can tolerate higher concentrations of heavy metals. In other words, they can adapt to higher concentrations. Manuscript profile