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28.10.2010· The mining industry has grown strongly in China in recent decades, resulting in large amounts of coal gangues, which cause water and soil pollution, soil erosion, and various other environmental problems. They are often used in reclamation projects in attempts to restore land damaged by mining, hence they are frequently present (in widely varying proportions) in the topsoil in areas
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The accumulated coal gangue without appropriate utilization has resulted in a squander of resources, waste disposal and environmental pollution issues. Over the past few decades, there has been
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01.05.2020· To date, gangue and fly ash are not utilised on a large scale, and the comprehensive rate of utilisation remains low, so environmental pollution problems caused by coal gangue and fly ash are a pressing issue (Xu et al., 2017). To dispose of such solid wastes more efficiently, scholars have proposed methods that involve backfill such wastes into an underground goaf. In the method of backfill mining
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01.03.2018· The coal mine wastewater and coal gangue leachate can discharge harmful heavy metals, radioactive elements, polycyclic aromatic hydrocarbons and other organic pollutants, which may cause hydrogeochemical reactions and consequently significant increase of TDS and hardness in groundwater, pollution of soil and deterioration of ecological environment (Sydnor and Redente,
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pollution at coal gangues, several coal gangues in Guizhou Province, China that had undergone natural recovery via native plants for 8 years were investigated in summer 2019. Three plots (2 m × 2 m) from the coal gangue area were selected for the treatment (GP). Control plots that were 100 m away from GP were also investigated in contrast (CK-near). In addition, plots from forest, farmland
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Coal gangue governance easing orefield ecological environment destruction pressure, promote the economic development, and promote the regional sustainable development. This paper first analyzes the effect of coal gangue accumulation on sustainable development of orefield, the influence of coal gangue accumulation that seriously prevent the regional sustainable development.
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soil pollution [1]. As an alternative solution, foundation backfi lled with coal gangue can make the best use of a large amount of coal gangue, consequently reducing environmental pollution [2]. Furthermore, backfi ll engineering would help mining areas dispose of coal Original Research Comprehensive Landscape Ecology Stability Assessment of a Coal Gangue Backfi ll Reclamation Area Liu
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A large number of stacked coal gangue, not only pressure occupied land, ecological impacts, waste rock leaching water surrounding soil and groundwater pollution, and coal gangue contains some combustible material, spontaneous combustion occurs under suitable conditions, emissions of sulfur dioxide, nitrogen oxides, carbon oxides and soot and other harmful gases pollute the atmosphere, affect
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02.01.2021· Online detection of coal and gangue is the key to intelligent separation of coal and gangue which is significant for improving coal mining efficiency and deducing environmental pollution. To improve the detection of coal and gangue under complex conditions, we proposed a cascade network that consists of detector and discriminator.
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Coal mining and washing are the main process of coal gangue production. It accounts for 10%‒15% of the coal composition. In China, coal gangue discharge was about 300 million t/a, causing pollution of water, soil, and so on. 2-5 In addition to some organic compounds and metal oxides, there is a large amount of SiO 2 and Al 2 O 3.
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soil pollution [1]. As an alternative solution, foundation backfi lled with coal gangue can make the best use of a large amount of coal gangue, consequently reducing environmental pollution [2]. Furthermore, backfi ll engineering would help mining areas dispose of coal Original Research Comprehensive Landscape Ecology Stability Assessment of a Coal Gangue Backfi ll Reclamation Area Liu
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Coal gangue governance easing orefield ecological environment destruction pressure, promote the economic development, and promote the regional sustainable development. This paper first analyzes the effect of coal gangue accumulation on sustainable development of orefield, the influence of coal gangue accumulation that seriously prevent the regional sustainable development.
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In this paper, we discussed the gangue on the mining area that have bad economic and environmental impact. It has been shown that the coal gangue accumulation could seriously prevent the regional ecological and economic sustainable development. Pollution control technology is the key to solve this problem. So we analyzed it and divided it into three categories: coal gangue prophylaxis and
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Coal gangue is the left solid waste in the process of coal mining, which is all kinds of rocks and residual abandoned coal and washing in machining coal, its composition is very complicated, and
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Coal gangue is the left solid waste in the process of coal mining, which is all kinds of rocks and residual abandoned coal and washing in machining coal, its composition is very complicated, and
Get PriceCoal gangue is a kind of black gray rock with lower carbon content and harder than coal in the process of coal formation, which is produced in the process of tunneling, mining and coal washing [19]. Coal gangue production accounts for about 10%–15% of raw coal production, but the utilization rate of coal gangue is low and needs to be further improved [20,21]. It is found that coal gangue
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Screening of the Potential Water Pollution Component in Coal Gangue. The quality assessment criteria for water quality involve pollutant limits, which are a key indicator of whether coal gangue has an impact on the water quality. According to the status quo of groundwater quality in China, the standard of human health, and environmental protection target of groundwater quality and based on the
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Results showed that compared with pure coal gangue, co-combustion with low-quality coal lowered ignition and burnout temperature, but only slightly decreased the activation energy. In regard to pollution emissions, the coal addition contributed to the tailing peak of SO2 emission during co-combustion, which may influence the desulfurization process. The co-combustion elevated the NO yield due
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The results indicate that the coal gangues contain abundant harmful organic substances like polycyclic aromatic hydrocarbons. The TOC and sulfur contents of the samples are much higher than those of the background sample except Sample JL7. The contents of organic bulk parameters are relatively high. Ten carcinogenic PAHs were identified and these harmful organic substances have
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the main process of coal gangue production. It accounts for 10%‒15% of the coal composition. In China, coal gangue dis- charge was about 300 million t/a, causing pollution of water, soil, and so on.2‒5 In addition to some organic compounds and metal oxides, there is a large amount of SiO 2 and Al 2O 3. Therefore, it could be used as an important raw mineral ma-terial in the industries of
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