The reclamation of surface (opencast) coal mines is not always successful; there remains a legacy of degraded land that burdens local communities. This article evaluates a communityoriented, lowcost means of geoecological regeneration, the "Cradle for Nature" strategy, which uses mosaic tree planting to foster positive natural ecological processes. Results show that, while the ...
The opencast mining process mainly entails topsoil stripping, coal mining, coal transportation, solid waste disposal, and land reclamation (Fig. 3). First, the topsoil and rock are stripped from the surface covering the ore body. Then, the exposed ore body is mined directly.
Methods of extraction Coal extraction methods vary depending on whether the mine is an underground mine or a surface (also called open cast) mine. Additionally, coal seam thickness and geology are factors in the selection of a mining method. The most economical method of coal extraction for surface mines is the electric shovel or drag line.
The mining company tried to open another opencast the same size as FfosyFran, which was successfully shut down as well." But, despite their best efforts, mining at FfosyFran continued. There ...
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 ...
Openpit mining technology. Openpit mining clearly offers a number of economic advantages over underground mining, especially now that mineralprocessing technology has advanced to the stage where very lowgrade ores can be treated profitably. 100 to 150 years ago, this was not the case, and mining was still much more selective.
The last operating opencast mine in the UK, which produces around twothirds of the country's coal, has closed amid concerns that it could be left abandoned. The FfosyFran pit in Merthyr Tydfil has produced nearly million tonnes of coal since opening in 2008, and is responsible for 86% of the UK's total coal output.
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 ...
But open cast coal production moved in an increasing scale for development of higher capacity Heavy Earth Moving Machinery (HEMM) in the globe and its adoption in Indian Coal Mining Industry. In ...
Coal mining process in Pingshuo opencast mine involves clearing the aboveground vegetation, removing the topsoil and overburden to access coal seams. The overburden, consisting of soils and rocks with large diameter, is transported and piled to form largescale dumps in Pingshuo mine with the application of topsoil that is characterized by ...
The triangulated irregular network (TIN) clipping algorithm is one of the vital algorithms for the digital mining design of opencast coal mines based on the geological digital elevation model (DEM) described by TIN. This paper gives a precise TIN clipping algorithm applied in the digital mining design of the opencast coal mine. To improve the algorithm's efficiency, a spatial grid index is ...
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.
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
The excavation and backfilling of opencast coal mines in permafrost regions inevitably changes the geothermal state and degenerates surrounding permafrost, causing severe engineering and environmental problems—thaw slumping, ground fissures, vegetation degradation and desertification. Therefore, it is desirable to investigate the thermal regime evolution within the mining area during the ...
The Piparwar opencast mine in Jharkhand was once the largest coalproducing mine in the state and had damaged the local ecology. Now, after about 30 years of mining operations being started, the staterun Central Coalfields Limited (CCL), is carrying out reclamation and restoration in a part of the original mining area, to make it suitable for public use.
The mineable and partially mineable seams in the mining area are 5 #, 6 #, and 9 #. Of the three coal seams, 5 # is partially mineable. As for 9 # coal seam, its mining authority is restricted within the scope of mineral rights. Therefore, 6 # composite seam is the main mining area with an average thickness of m.
Opencast coal mining causes serious damage to the natural landscape, resulting in the depletion of the carbon sequestration capacity in the mining activity. There are few studies on the variation of carbon sequestration capabilities caused by land use changes in opencast mining areas.
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.
The Yimin opencast coal mine was selected to conduct a case study. The production of 100 tons of coal was used as the functional unit to evaluate the environmental risks in the stages of stripping, mining, transportation, processing, and reclamation. A total of six environmental impact categories,, resource consumption, acidification ...
Large amounts of waste can be produced in the process. Surface mining also can cause noise and disturbance, leave scars on the landscape and may pollute the air with dust (Bell and Donnelly ... Environmental impacts of opencast coal mining have been thoroughly investigated by many researchers and defined for the various stages of the coal fuel ...
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 ...
In order to improve dust pollution control in opencast coal mines, this study combines prospect theory with evolutionary game theory, analyzing the evolutionary game process of coordinated governance activities of coal mining enterprises, local regulators, and social camps in the management of dust pollution against the backdrop of national supe...
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.
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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