Opencast coal mining activities result in severe degradation of land resources and ecological environment (Wang et al. 2016).In the process of opencast mining, topsoil overlying the coal are stripped and deposited on damlike dump with largescale heavy machinery (Krummelbein et al. 2010).The compaction effects are intensified by the large tires of crawlers and dump trucks going back and forth.
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Opencast coal mining in India: Analyzing and addressing the air environmental impacts Mrinal K. Ghose First published: 04 April 2007 https://// Citations: 8 PDF Tools Share References Citing Literature Volume 16, Issue 3 Spring 2007 Pages 7187 References Information
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The technology for opencast lignite mining is noted for its high production efficiency, high level of recovery and lower risk as regards the safety of workers when compared with underground mining systems. ... The authors concluded that mined land reclamation is an important process in opencast coal mine production; however, it was rarely ...
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Open Cast Mining. Open cast mining is usually associated with coal or other tabular deposits that are more or less flatlying. A significant difference between open pit and open cast mining methods is that in open cast mining, overburden that is removed to gain access to the ore is immediately placed in the previously mined cut.
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Opencast mining or quarrying of minerals is easier than mining by underground methods. During quarrying the alluvium and rocks below which the minerals lie, are removed and dumped, in the initial stages, in a place which is not required in future for quarrying, residential or other purposes. The mineral exposed is completely extracted. Opencast ...
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Coal is one of the most essential resources of a country. It is widely used for power generation and as a raw material in the industries. India ranks third in coal production. However, the country has to import coal in order to meet the rising demand for coal. In India, coal mining is conducted using two methods: underground and opencast methods.
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Such work provides a theoretical foundation and technical support for systematic research on the process of land reclamation in large opencast coal mines (Song et al., 2020). In general, the important roles of monitoring and evaluating the land reclamation effects at different stages in guiding the ecological restoration of degraded mining ...
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This study therefore investigated the pollution of surface soils surrounding 135 large opencast coal mining pits in China. A total of 1772 surface soil samples were collected, and the concentrations of eight major HMs were determined. The HM concentrations in this study were relatively lower than the published HM concentrations of coal mine ...
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1. Introduction. Seventyfive percent of the added value of coal production worldwide originates from opencast coal mining, and, in China, opencast coal production occupies 15% of the total coal production [].Opencast coal mine areas currently represent the most typically degraded ecosystem [].In recent years, the development of coal resources in China gradually moved toward the western semi ...
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The opencast coal mining complex extends. over two mines within the Witbank Coalfield, ... These sumps required a mud loading process prior to mining the coal below the sequence. The mud loading ...
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Openpit mining, also known as opencast mining, is a surface mining technique that extracts minerals from an open pit in the ground. Openpit mining is the most common method used throughout the world for mineral mining and does not require extractive methods or tunnels. This surface mining technique is used when mineral or ore deposits are ...
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opencast mining Stripping surface layers from the Earth's crust to obtain coal, ores or other valuable minerals. Dragline excavators strip away surface layers and mechanical shovels distribute minerals and spoil. The minerals are carried away for grading and processing. In some countries, owners of opencast mines are required to restore the environmental quality of the land after mining has ...
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This process is experimental and the keywords may be updated as the learning algorithm improves. Chapter PDF. Download to read the full chapter text References 'Opencast Coal Mining in Great Britain', W. G. Martin, Opencast Mining, Quarrying and Alluvial Mining, Institution of Mining and Metallurgy, 1965, p. 617. Google Scholar ...
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The research object of this paper is road dust in opencast coal mines. International Organization for Standardization (ISO) regulations, dust is suspended solids with particle size less than 75μm, including and PM10. During the mining process of openpit coal mines, various techniques can generate dust.
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The opencast mining actions are the main reasons for forest cover reduction and forest fragmentation since most of the mining sites are found inside the dense, interior, and biodiversityrich areas of the forests (Sonter et al., 2017). ... Land Restoration / Reclamation Monitoring of 51 Opencast Coal Mines Projects of CIL Producing more than 5 ...
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Openpit mining, also known as opencast or opencut mining and in larger contexts megamining, [1] is a surface mining technique of extracting rock or minerals from the earth from an openair 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.
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In particular, we analyzed the dynamic change process of land use in typical openpit coal mines from 2001 to 2020, identified the reasons for the spatial changes in land use, and put forward policy recommendations for the optimization of land mining and reclamation in mining areas. ... Mukherjee S., Pahari Underground and Opencast Coal ...
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Openpit mining. Some 53% of South Africa's coal is produced from surface mining, via opencast or openpit mines. This is because the coal is less than 60 metres below the surface. Openpit mines use draglines, as well as truck and shovel operations to extract coal. A dragline excavator uses a dragline to pull a bucket by a wire cable.
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Opencast mining production is affected by many factors such as internal and external structures of the slope, soil softening, seepage, stress redistribution, rainfall pattern and erosion (Wu et al 2015; Zhou et al 2009).Of all these factors, rainfall infiltration has been described as the major cause of slope failure that can result in harmful incidents in open pit mining operation and loss of ...
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Opencast mining operations involve the removal of huge quantities of overburden, dumping, and backfilling of the excavated area. These overburden deposits of waste material containing lowgrade ores are represented as mine spoil dumps.
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