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 …
The five largest coal mines in operation in China
It is owned by Shaanxi Coal and Chemical Industry Group and produced an estimated 41.34 mtpa of coal in 2023. Buy the profile here. 2. Heidaigou Mine. Located in Inner Mongolia, the Heidaigou Mine is owned by China Shenhua Energy. The surface mine produced an estimated 33.1 mtpa of coal in 2023. The mine will operate until 2030. Buy …
Two long-runout rock avalanches in 2022 and 2020 in an …
Guizhou is one of major coal mining provinces in China, ranking fifth for coal reserves. Nine major coalfields divide the province. The Zhijin–Nayong Coalfield, …
Coal mining | Definition, History, Types, & Facts | Britannica
Coal mining, extraction of coal deposits from the surface of Earth from underground. Coal has been used since the Bronze Age, 3,000 to 4,000 years ago, and was the basic energy source that fueled the Industrial Revolution of the 18th and 19th centuries. ... Except for the Chinese, who may have mined coal underground, all the early coal seams ...
Backfilling Technology of Substituting Waste and Fly Ash for Coal
Owing to the large-scale promotion and application of the solid backfill coal mining technique in Chinese coal mines, large quantities of coal gangue and other forms of solid wastes have been ...
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 …
Application of seismic velocity tomography in underground coal …
The Yuejin coal mine, owned and operated by Yima Coal Group Company, is located in the west of Henan Province, China. Currently, mining activity at the Yuejin coal mine occurs in LW 25110 and LW 23070, as shown in Fig. 3. The panels are fairly deep at about 970 m and 760 m underground, respectively. The fully-mechanized top coal …
Research and practice of intelligent coal mine technology …
Given the coal resources in China, underground mining is the main method of extraction, with open-pit mining accounting for less than 15% of coal production. …
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 …
Investing $300 Million, China's Qinfa Group Starts Underground Coal …
Today, we are introducing a paradigm shift in the Indonesian mining sector by operating our underground coal mine with the latest technology. Committed to setting new standards in responsible mining practices "We are committed to improving and having a positive impact on economic growth both locally and nationally," said Xu Da.
Impacts of underground coal mining on phreatic water …
Underground coal mining destroys overlying strata, and phreatic aquifer above the panel is destabilized, causing phreatic water level (PWL) variation. On-site monitoring of the PWL variation throughout the mining period is of great significance to the management and conservation of groundwater resources in arid and semiarid mining …
Comparison of Underground Coal Mining …
Coal is China's main source of energy, and its production causes a certain degree of air, water, and land resource pollution. Therefore, it is necessary to compare environmental pollution caused by …
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 …
Advances in coal mining technology and sustainable mining …
There are around 20 different underground coal mining methods utilized in China. Most of them are longwall systems. 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.
Innovation for sustainable mining: Integrated planning of …
Coal is the primary energy, generating 37% of the global electricity and more than 70% of steel (WCA, 2020).In China, ∼56% of energy and over 70% of electricity …
A new indicator for estimating the degree of mining-induced …
Underground longwall coal mining alters the initial stress regime of overlying rock strata (overburden), leads to the collapse of highly jointed rock mass or the bending …
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 …
Effect of Underground Coal Mining on the Regional Soil Organic Carbon
In China, coal production was 3.45 × 10 9 tonnes in 2017, which accounted for 45.6% of the total world coal production [].Coal mining and especially underground coal mining has destroyed a huge number of land resources, and most of the coal-mining subsidence land is farmland [], including agricultural regions in the North China Plain, …
Coal mining
Coal mining - Underground mining: In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata. Access to the coal seam is gained by suitable openings from the surface, and a network of roadways driven in the seam then …
Five largest coal mines in China in 2020
The Bulianta Mine, owned by China Shenhua Energy, is an underground mine located in Inner Mongolia. The mine produced an estimated 29.718 MTPA of coal in 2020. The mine will operate until 2034. 5. Haerwusu Mine. Owned by China Shenhua Energy, the Haerwusu Mine is a surface mine located in Inner Mongolia.
Main geological and mining factors affecting …
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 …
Effects of Underground Coal Mining on Soil Spatial Water …
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 remain unclear in sandy land. We investigated the effects of land subsidence induced by underground mining on the soil quality ...
A novel method for estimating methane emissions from underground coal
The Mafangquan (MFQ) fault zone, transecting a coal seam in Jiulishan coal mine in Jiaozuo coalfield, Henan Province, China, was investigated in detail in view of coal mining safety, including its architecture, stress and permeability features and implication for coal and gas outburst. 10 boreholes have been drilled for formation testing as ...
Underground Disposal of Coal Gangue Backfill in China
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 the ground surface as waste heaps, it occupies large areas of land and cause environmental pollution. This paper summarizes the …
Research and practice of intelligent coal mine technology systems in China
Given the coal resources in China, underground mining is the main method of extraction, with open-pit mining accounting for less than 15% of coal production. Scientific research has enabled underground mining to shift from mechanized mining to automated and intelligent mining. Coal mine intelligence is the core technical support …
Mercury emission from underground coal fires in the mining …
1. Introduction. Underground coal fires refer to the burning or smoldering of coal seams, which commonly occur when the underground coal seams are exposed to the air and then ignited by accumulated heats due to exothermic reactions between coal components and oxygen (Stracher, 2004; Wang et al., 2003).With the increase of coal …
Characteristics of coal resources in China and statistical …
2.1 Coal resource storage characteristics. Coal is the most abundant fossil energy source in the world, and about 80 countries in the world have coal resources (Zhang et al. 2021c).China is not only the largest coal producer in the world, but also the largest coal consumer and importer (Jia et al. 2021).However, the coal reserves suitable for …
Microbial Community Structure, Metabolic …
Long-term coal mining has created unique microbial communities in deep coal mines. Revealing the microbial community structure and metabolic functions in the underground environment can …
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 …
Response and prediction of ecosystem service values to land …
However, the mechanism of how land use changes resulting from underground coal mining affect ecosystem service remains unclear, especially in areas with high groundwater levels. To address this issue, we studied the spatiotemporal in land use change in Jining City from 2000 to 2020 and employed Markov-PIM (probability …