It is particularly suitable for assessing discharge and pollution caused by solid waste from mines: As mine solid waste has a low recycling rate compared to other solid waste (Nabavi-Pelesaraei et al., 2022a; Mostashari-Rad et al., 2020; Nabavi-Pelesaraei et al., 2017), the construction of mine tailings ponds can occupy a large …
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Attitude of Chinese public towards municipal solid waste sorting policy: A text mining study. Author links open overlay panel Zezhou Wu a b, Yan Zhang a, Qiaohui Chen c, Hao Wang d. Show more. Add to Mendeley. ... In China, Sina Weibo is the largest platform for the Chinese public to communicate with each other and provides a large …
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In the terms of phase behavior, solid fluidization inherits certain mining characteristics of coal and petroleum, transferring the dissociation reaction from the porous medium to the artificial container, ... China not only listed NGH as an independent mineral in 2017, but also made the exploration and commercial trial exploitation of gas ...
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Although coal has made a great contribution to China's economic and social development, the traditional mining methods of coal resources have caused many problems (Ahern and Hendryx 2012; Adibee et al. 2013; Bernhardt et al. 2012; Chen et al. 2014; Hussain et al. 2016; Kurth et al. 2015; Song and Wang. 2019), such as the …
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Characterisation of coal-mine waste in solid backfill mining in China: Mining Technology: Vol 124, No 1 - Get Access. Mining Technology. Transactions of the Institutions of …
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In China, the main sources of soil heavy metal pollution are sewage irrigation, sludge application, and metal ore mining and smelting operations (Chen et al., 1999). A six-year soil pollution study conducted by the Chinese government found that the country's soil has been severely polluted by human activities in the industrial, mining, …
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The production and utilization properties of industrial solid waste are shown in Fig. 9, according to the statistical data from the Ministry of Ecology and Environment of the People’s Republic of China in 2015. Mine solid waste is a major kind of industrial solid waste produced in the ore mining, mineral processing and associated ...
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China's total coal production in 2021 exceeded 4.13 billion tons, 52% of the world's total. Coal gangue, a solid waste of coal mining accounts for 15–20% of coal production, when directly ...
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Although landfill mining has been encouraged in accordance with current municipal solid waste (MSW) management policies in China, the material stocks in landfills and their recycling potentials for the whole nation still remain nebulous, and the lack of high-resolution data hinders the formulation of evidence-based landfill mining policies.
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In 1980, Xinjin County in Sichuan, China, completed a glauberite mine with an annual output of 100,000 tons with chamber solution mining method. In 1981, China and the United States tried to mine natural alkali ore in Wucheng, Henan Province, and in the Green River Basin by soluble mining method, respectively. The solution mining …
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The purpose of this paper is to present the state of the art of backfill mining in China coal mines. It begins with brief review on the developing history of backfill coal …
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Professor Xu [116] at China University of Mining & Technology made a newly solid oxide fuel cell with symmetric electrode in which the electrodes are designed by a La 0.4 Sr 0.6 Co 0.2 Fe 0.7 Nb 0.1 O 3-δ Gd 0.1 Ce 0.9 O 2-δ and the electrolyte is developed by Zirconia.
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Data of the solid waste discharges and their mining-associated constituents were from the China Environment Yearbook Editorial Commitee (2003).Data of the accumulated solid waste storage and land take were from the China Environment Yearbook 2001 (China Environment Yearbook Editorial Committee, 2001) because …
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World's top 50 mining companies end 2022 rock solid but Chinese stocks slide down the rankings despite surging coal and lithium prices, and Russian miners trading in Moscow finally succumb.
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The ongoing progress and improvement of filling mining technology have provided significant advantages, such as "green mining, safe, efficient, and low-carbon …
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Abstract and Figures. As an important component of green mining techniques, backfill mining has experienced great development in China coal mines in recent 10 years. The purpose of this paper is ...
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(china nonferrous Metals industry association, 2020, p. 14; national Bureau of Statistics of china, 2020b). in 2019, china invested about $14.4 billion1 in geologic exploration and $173 billion in mining activities (development and production of fuel and nonfuel minerals), representing a year-on-year increase of 23% and 24%, respectively. in
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Among them, the total accumulation of CSW exceeds 4.5 billion tons, with an additional emission of 795 million tons per year ( Tao, 2023 ). Fig. 2 shows the basic situation of …
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Transporting gangues vertically from surface to underground is a new technology in solid backfill mining, which has been widely used in China. However, the dynamic impact induced by the falling gangues could be a threat to the underground equipment, bringing about serious problems such as abrasion, dynamic impact, air …
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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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The first half of 2023 has witnessed a 17.2% and 7.5% increase in the investment amount of prospecting of solid minerals and "oil & gas" respectively; and 242 new prospecting rights have been granted, a 25.4% increase compared with that in the first half of 2022. ... In China, mining rights are divided into prospection rights and extraction ...
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Moreover, China has made progress in solid mining method and proposed hydraulic lifting method . Figure 5 illustrates the system structure of hydraulic lifting method of mining natural gas hydrate in the South China Sea. 3. Development Potential Analysis 3.1. Strengths Weaknesses Opportunities Threats and Polictics Economics Society …
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In China, solution mining is mainly adopted for underground well salt mining. Solution mining is subdivided into many specific technologies, and the underground space formed by them is quite different in shape, as shown in Fig. 2 a, these spaces are called salt caverns or mined-out areas of salt mines. Download : Download …
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China's total coal production in 2021 exceeded 4.13 billion tons, 52% of the world's total. Coal gangue, a solid waste of coal mining accounts for 15–20% of coal production, when directly discharged on …
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Recent estimates suggest that as much as 5·5 billion tonnes of coal-mine waste are produced and disposed of on the surface in China annually, with this rate …
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Section snippets Coal gangue. Fly-ash and coal gangue are the two main industrial solid waste in China. The chemical compositions (shown in Table 1) were SiO 2, Al 2 O 3, Fe 2 O 3 and some impurities. As the coal gangue is main solid waste for coal mining, one of the most common approaches to waste rock is to stack construction that …
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Dexing City is a large mining city located in Jiangxi Province (24°29′14″ N to 30°04′41″ N; 113°34′36″ E to 118°28′58″ E), China (as shown in Fig. 1), whose proven reserves and developed minerals amount to more than 30 kinds, abounding in gold, silver, copper and other non-ferrous metals, including over 9 million tonnes of copper reserves …
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The copper price rose on Thursday as hopes for improved demand in China offset fears about the pace of interest rate rises and slowing economic growth. China's central bank is easing monetary ...
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Solid/solution partition coefficient (K d) and speciation of soil heavy metals can be used for predicting their environmental risks.The K d values and solution speciation of soil Cu, Cd and Zn were analyzed in 40 samples of contaminated agricultural soils around Jiuhua copper mine in eastern Nanjing city, China. The K d ranges (and mean …
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Characterisation of coal-mine waste in solid backfill mining in China. H. Jiang Key Laboratory of Deep Coal Resource MiningMinistry of Education of China, Xuzhou221116, China;School of Mines, China University of Mining and Technology, Xuzhou221116, China Correspondence hqjiang2007@126,
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Despite China's position as a global mining powerhouse, tens of thousands of small- and medium-sized mines (SM mines) within the country continue to pose potential safety hazards and environmental …
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Mining is the foundation of modern industrial development. In the context of the "carbon peaking and carbon neutrality" era, countries have put forward the development strategy of "adhering to the harmonious coexistence of humans and nature." The ongoing progress and improvement of filling mining technology have provided significant …
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