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underground coal mining in china
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Emission factors of fugitive methane from underground coal mines …
Compared to other countries, China has more underground coal mines. Although the United States is the second largest producer of coal in the world, the number of underground coal mines in China is more than 10 times that of the United States [41], [42].The large workload has made it difficult for China to carry out Tier 3 to calculate …
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Quantify the extensive crop damage and grain losses caused …
Here, we presented a remote sensing and spatial gradient model to quantitatively evaluate grain production caused by underground coal mining in eastern China. The results show that more than 80103.15 ha of land has been impacted by coal mining subsidence by 2020, with 28417.86 ha (35.48%) directly turned into water or wetland, and 51685.29 ha ...
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Implementation of underground longhole directional drilling technology
1. Introduction. Coal and Coalbed Methane (CBM) are rich in resources and complex in geological conditions in Chinese underground coal mines. Exploration results show that CBM resources in China occurring within explored coal areas to a depth of 2000 m, are estimated at 36.8 × 10 12 m 3, over 60.7% of the proven CBM reserves occur at …
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Coal-mining technology in China
The coal reserves of this mine are 1.3 billion tons; the average stripping ratio is about 1:5. UNDERGROUND MINING China's output of coal from underground mining amounted to about 700 million tons in 1983, the largest output in the world. Mining methods vary according to the geological structure of a particular coal seam.
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Advances in coal mining technology and sustainable mining …
China mines coal resources in regions (Shandong, Henan, Anhui, Hebei, and Jiangsu Province) where mining, water resources, ... Dr. Syd S. Peng has classified underground coal mining method in China depending upon the height of seam to be dealt, into the following six major types (Peng, 2010): 1. Thin seams 0.4–1.3 ...
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Research progress of monitoring, forecasting, and prevention of
As one of the dynamic disasters of coal mines, rockburst seriously affects underground safe coal mining. Based on the laboratory test, field test, and theoretical analysis, this study proposed the principle of the rock burst induced by the combination of dynamic and static stresses and divided such rock burst into three types, including …
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Changes of Land use and environment in underground coal mining …
Mining subsidence is a direct source of environmental geological disaster in coal mine. In eastern China, lots of land submerged into water or became polder land, because of underground mining and ...
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Concurrent mining and reclamation for underground coal …
Large scale underground mining of coal resources in China using longwall mining has resulted in ecological and environment problems, including surface …
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Underground space utilization of coalmines in China: A …
The main underground space for UWRs in China is the caving zone formed by longwall mining. Compared with previous UWRs that utilized the tunnel as the main …
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Frontiers | Underground Hydro-Pumped Energy Storage Using Coal Mine
Many underground mine reservoirs using coal goafs from Shennan coal mine district, northwest China, have been constructed. The quality analysis shows that the original well water is weakly alkaline (pH = 7.1–7.8) and there is any substantial difference from natural water, except some obvious increases in permanent hardness and sulfate …
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Soil properties in reclaimed farmland by filling subsidence …
Trans. Nonferrous Met. Soc. China 24(2014) 2627âˆ'2635 Soil properties in reclaimed farmland by filling subsidence basin due to underground coal mining with mineral wastes in China Wei CHENG, Zheng-fu BIAN, Ji-hong DONG, Shao-gang LEI College of Environment and Spatial Informatics, China University of Mining and …
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Life cycle assessment of underground coal mining in China
This study performs an in-depth analysis of the environmental impacts of underground coal mining in China. Some technical measures are proposed based on the LCA results to realise clean and efficient coal production and build a green and …
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In-situ stress measurements and stress distribution characteristics …
In most of the underground coal mines in China the overcoring method is applied to measure in-situ stresses with hydraulic fracturing being used in very few mines. Due to the special working conditions in Chinese underground coal mines, such as methane problems and damp and narrow working spaces, stringent requirements are …
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Innovation for sustainable mining: Integrated planning of …
In China, ∼56% of energy and over 70% of electricity are produced by coal (Xie et al., 2019; Xu et al., 2017), with 85% of coal from underground coal mining …
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Two long-runout rock avalanches in 2022 and 2020 in an underground coal …
On 8 May 2022 and 12 April 2020, two large rock avalanches occurred in Zhijin County, China, in the villages of Baiyan and Baiwu, respectively. These long-runout rock avalanches had the same geological, hydrological, and topographical settings and similar triggering factors but different mobility, and this inspired a research interest in the failure …
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Effects of Underground Coal Mining on Soil …
Underground coal mining in western China causes heavy land subsidence and alters the soil ecol. However, the effects of land subsidence on soil fertility are not currently known, and the key factors governing its impact …
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Insight into the water–rock interaction process and …
The buried depth of 5 −2 coal seam in the second level is 162.9 ~ 280.0 m, and the main mining area of Daliuta Mine is 5 −2 coal Sanpan area. The goaf formed after mining of 5 −2 coal seam has built two water recycling chambers, and the No. 4 underground reservoir is under construction. There are three kinds of water sources in …
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Life cycle assessment of underground coal mining in China
Coal is not only the main fossil fuel in China but also a pollution source. To evaluate the impact of coal production on the environment, a life cycle assessment (LCA) was conducted on the mining process of a typical coal mine in China by using the SimaPro 9.0.0 software. The Ecoinvent v3 database w …
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A new approach to estimate fugitive methane emissions from coal mining
China is one of the few countries among the major world economies that uses coal as its primary energy source; more specifically, it produced 3.68 billion tons of coal in 2013, which represents 45.5% of total coal production throughout the world for that year (IEA, 2014) and accounts for 71.64% and 67.5% of China's total primary energy …
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Characteristics of coal resources in China and statistical …
2.2 Coal resources mining characteristics. With the active promotion of China's carbon peaking and carbon neutralization work, China's energy supply has achieved remarkable results and production has grown steadily (Zhang et al 2022; Li 2021).As shown in Fig. 2, the raw coal production of China was 4.13 billion tons in …
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Interaction analysis for CO2 geological storage and underground coal
The CO 2 geological storage in Ordos Basin and coal mining activities occurring simultaneously at the same location is a highly challenging coupled thermo-hydro-mechano-chemical (THMC) problem. To address this problem, an in-house program named "AEEA Coupler" was developed by linking two commercial software packages, Simulia …
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Wetlands Created by Underground Coal Mining in …
China is rich in coal resources, which account for 69% of its own total energy consumption (Bian et al. 2010). Coal production in 2015 was 3.75 billion tonnes, approximately 50% of the
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Spatio-temporal analysis of ground subsidence due to …
coal output in China comes from the underground coal mining (Hu et al. 1997), which plays significant roles in China's livelihood, industry and economy. Underground coal extraction inevitably causes ground subsidence, which severely disturbs the surface. This situation is even more apparent in East China, which is both the main coal and ...
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The five largest coal mines in operation in China
The following are the five largest coal mines by production in China in 2023, according to GlobalData's mining database, which tracks more than 33,000 mines and projects from early exploration to closure across more than 150 countries and over 100 commodities. ... The Bulianta Mine, owned by China Shenhua Energy, is an …
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Spatio-temporal analysis of ground subsidence due to underground coal …
China is both the world's largest coal producer and coal consumer. The total output of coal exceeds 3 billion tons, accounting for 42 % of the global production (Wang et al. 2009) and contributes over 74 % to China's domestic energy consumption (Bian et al. 2010).Over 96 % of the coal output in China comes from the underground …
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Spatio-temporal analysis of ground subsidence due to …
Over 96 % of the coal output in China comes from the underground coal mining (Hu et al. 1997), which plays significant roles in China's livelihood, industry and …
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Dynamic mechanism triggering an underground-mining …
Generally speaking, the dominant technique for coal extraction in China began to change from blasting mining to mechanized mining from 1960s for an efficient and safe operation. However, as for the extraction of thin coal seams formed in Southwest China, the blasting mining method is still widely used (Li et al. 2005 ).
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Effects of land use transitions due to underground coal mining …
1. Introduction. Coal resources play a strategic role in long-term development in China; coal outputs achieved 3.87 billion tonnes in 2014, accounting for 49% of global gross production (The National Bureau of statistics of the people's Republic of China).More than 92% of the coal produced is from underground mining, which causes severe …
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Research on prediction method of coal mining surface
Coal seam mining causes fracture and movement of overlying strata in goaf, and endangers the safety of surface structures and underground pipelines. Based on the engineering geological conditions ...
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Comparison of Underground Coal Mining Methods Based on …
Tao et al. (2021) conducted a LCA of a typical coal mine in China, which identified the main impact categories of the mine and key processes contributing to the …
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Mass Production Technologies for Underground Coal Mining …
The challenges of implementing MPTs in underground coal mines with complex geological and mining conditions are explained. To negotiate difficult geological and mining conditions and meet the CIL target of producing 100 MT coal by 2027–28, this Keynote introduces a roadmap for implementing MPTs in Indian underground coal mines.
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Development status of coal mining in China
The average mining capacity of coal mines in China is 1.05 Mt/a, with 1181 coal mines with an average capacity less than 0.3 Mt/a, accounting for 35% of the total coal mines but contributing only ...
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The Estimation of the Number of Underground Coal Miners …
Due to the improvement of production technology and the adjustment of energy structure, as well as the town-ownership and private-ownership coal mines (TPCM) were closed or merged by national policy, the number of underground miner has changed comparing with 2004 in China, so collective dose and normalization collective dose in …
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Life cycle assessment of underground coal mining in China
Complete and accurate accounting of greenhouse gas (GHG) emissions from coal mines in China is a critical basis for identifying mitigation potential and making …
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Main geological and mining factors affecting ground …
Abstract As one of the largest coal-rich provinces in China, Shanxi has extensive underground coal-mining operations. These operations have caused numerous ground cracks and substantial environmental damage. To study the main geo-logical and mining factors influencing mining-related ground cracks in Shanxi, a detailed investigation was ...
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Utilization of resources in abandoned coal mines for carbon …
Even after the abandoned coal mines are closed, a large quantity of underground resources remains undeveloped and unutilized. According to the survey, coal mines that have been closed so far contain coal resources of up to 42 billion tons, while the natural gas resources are estimated to be nearly 500 billion m 3.Moreover, there also …
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