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The Qinghai-Tibet Plateau (QTP) is the largest mid-to low latitude and high-altitude permafrost. Open-pit coal mining and other activities have caused serious damage to the alpine ecological environment and have accelerated the degradation of permafrost on the QTP. In this study, the influence of open-pit coal mining on the time series ground …
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Coal mining subsidence wetlands, as important supplementary resources for wetlands, are of great significance for regulating climate change. This study investigated the distribution and influencing factors of carbon in the overlying water and sediment of coal mining subsidence wetlands in Xuzhou, China, during low-water, high-water, and dry …
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The influence of structural characteristics of coal seam overlying strata on the horizontal movement of loess slope is the same as that of subsidence, that is, the horizontal movement of loess slope is stronger after coal mining subsidence under any surface slope shape and when the sand coefficient of coal seam overlying strata is …
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In the process of coal seam mining, because of the influence of mining pressure, the floor of coal seam will be damaged in varying degrees. When the supporting pressure of the floor strata of coal seam reaches the critical value of rock yield, the rock mass will begin to break and deform, forming the pre-mining stress concentration region.
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Gas is one of the main factors causing coal mine accidents in China. Understanding the mechanism of the influence of mine pressure on coal seam gas emission has important theoretical guiding significance for coal mine enterprises to be able to control gas. This paper chose the 72,909 working face in the Du'erping coal mine as …
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Rare earth elements (REEs) have been used as tracers to reveal the hydrochemical sources and processes in groundwater systems that are usually modified by anthropogenic inputs. However, the REE behaviors in groundwater affected by mining activities have yet to be fully understood. In combination of REE geochemistry with …
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At present, most of research results focus on the influence of coal mining on the development height of fissures, and there are some studies on the development law of water-conducting fissures in the karst mining area [20, 21], but there is few research on the influence of the size of karst caves in rock strata on the development height of ...
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Determining the strata and surface movement of deep mining can provide a scientific basis for wellbore protection and mine land utilization. In this paper, numerical simulation …
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In China, adjacent coal seam mining is an important method to reduce stress, which increases the permeability of the coal seam. However, in the process of mining adjacent coal seams, many coal pillars remain, which causes stress concentrations and results in a decrease in permeability. Therefore, it is important to study the …
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Using 3DEC numerical simulation software to simulate the migration of overlying strata and the conditions of rib spalling under the influence of mining, a model of 290 m in length (X-direction), 250 m in width (Y-direction), and 80 m in height (Z-direction) was established according to the mining situation of the working face, with a length of …
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Despite decades of knowledge about its contribution to climate change, coal combustion still accounts for 40% of global CO 2 emissions from energy use. The power sector must stop using coal ...
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Finally, combining the main influencing factors of surface subsidence in the overlap area and the influence on ancient wooden buildings, technical measures are proposed to reduce the influence of surface subsidence on historical buildings due to coal mining in the overlap area: (1) using the method of filling coal mining to deal with the …
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Surface mines (sometimes called strip mines) were the source of about 63% of the coal mined in the United States in 2022. These mining operations remove the soil and rock above coal deposits, or seams. The largest surface mines in the United States are in Wyoming's Powder River Basin, …
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Download Citation | Influence Mechanism of Mine Pressure on Coal Seam Gas Emission During Mining | Gas is one of the main factors causing coal mine accidents in China. Understanding the mechanism ...
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Proximity coal seams are adjacent coal seams that are so closely spaced that their fallout zones can conduct after mining and have significant influence on each other [].When the close coal seam is retrieved, the roof of its lower coal seam will be affected by repeated mining damage, resulting in changes in the structure and stress …
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In particular, the finding indicated that JI exerts a more significant impact on SP than SC, revealing that JI produces a more significant adverse effect on miners' conscious safety behaviors than skill-based safety behaviors.,This study contributes to display the influence path of JI as a stressor on miners' safety performance in the coal ...
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Section snippets The concept of WRCC in mining areas under the influence of coal mine underground reservoir. The study of WRCC in mining area is to characterize the coordinated development of water resources, coal resources and ecological environment protection and realize green mining and sustainable …
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Coal is a black or brownish-black sedimentary rock that can be burned for fuel and used to generate electricity.It is composed mostly of carbon and hydrocarbons, which contain energy that can be released through combustion (burning). Coal is the largest source of energy for generating electricity in the world, and the most abundant fossil fuel …
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coal seam mining process, there are elastic damage zones and plastic damage zones of coal seams [3, 7]. Therefore, in order to improve the efficiency of gas extraction, it is necessary to study the elastic-plastic deformation process of coal seam under the influence of mining, and to study the law of coal seam gas trans-port under this condition.
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DOI: 10.2478/GOSPO-2014-0009 Corpus ID: 140638407; The influence of thermal transformation of coal mining wastes on their petrographic and mineralogical composition @article{Nowak2014TheIO, title={The influence of thermal transformation of coal mining wastes on their petrographic and mineralogical composition}, author={Jacek S. Nowak}, …
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The Yuheng coal area is a vital coal production base in China with a shallow depth of seam and good roof integrity, which is suitable for high-intensity mining 1,2.However, this area often faces ...
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Mining activities are the inducement of rockbursts in coal mines. The mining velocity of working faces is the most important man-made control factor during the mining process, which has a non-negligible influence on rockbursts. This study proposes that the working face mining velocity impacts the specific mechanical behavior through …
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Therefore, how to solve the sharp contradiction between coal mining and soil and water conservation has become a key scientific issue to realize ecological …
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Non-pillar mining, top-coal caving and protected coal seam mining are the most popular mining methods in coal exploitation, and the different mining layouts will change the stress state and failure mechanism of coal in front of the working face. In this paper, mining-induced mechanical behaviors under three mining layouts have been …
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The ecological problems caused by coal mining in Yellow River Basin are becoming more serious. In order to explore the influence characteristics of coal mining disturbance on soil factors and microbial community in Yellow River Basin, and to clarify the differences in soil microbial communities between the marginal coal mining subsidence area and the …
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Coal mining destabilizes the geological structure, contributing to surface subsidence and causing damage to the physical structure of the soil. A range of changes in environmental elements such …
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Coal mining in different coalfields in South Africa is known for decades (≈146 years) and its economic importance to the country has recently surpassed commodities such as gold. One of the Coalfield that is well known for coal production in the Limpopo province of South Africa is Pafuri Coalfield where Tshikondeni Colliery operated for 32 years before …
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Focusing on the largest coal-mining subsidence area in Jiangsu Province of China, this study examines the spatiotemporal evolution of land use intensity, morphology, and functionality across different time periods. ... by employing the GTWR model, it quantifies the influence of key factors, unveiling the spatially varying …
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The Jurassic Coalfield in Shaanxi Province, Western China, mainly reserves shallow coal seam with thick soil layer. Recently, due to high-strength underground mining, the subsidence of ground ...
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To study the regularity of anaerobic fermentation in coal during coal crack development, a series of tests and analyses was carried out. Test objects included dynamic air percolation with crack evolution, influence of changes in specific surface area, and rate of O2 percolation on anaerobic fermentation. The key factors affecting anaerobic …
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