coal exploitation

The impact of high-intensity coal mining on water resources has drastically affected the local environment in the Yushenfu mining area, Northwest China. Many studies have ascertained that coal mining has caused reduction of the phreatic water level and vegetation death, which has deteriorated the fragile arid and semiarid ecosystems. …

Thus, China’s coal exploitation has the problem of water resource shortage generally. 2552 Guiyu Yang et al. / Energy Procedia 75 ( 2015 ) 2548 â€" 2555 Table 3 the average water resources condition in main coal production provinces unit: 10^8t, % zone The surface water resources No-over groundwater Resources The total …

In research conducted by Dunmade et al. (2019) for South Africa, it is determined that the country's coal consumption has a 95% potential to contribute to global warming. Additionally, Wang et al ...

Coalbed methane (CBM) in the overlying strata of coal mines is recognized as an important alternative clean energy source. Under constant and cyclic loading of overlying strata, the mechanical response of sandstone is vital in determining the best stress-relief CBM exploitation position. In this paper, cyclic uniaxial compression tests …

The demand to abandon coal mining is increasing worldwide, and the need for efficient, safe, and environmentally acceptable coal exploitation and utilization has garnered widespread attention. We propose a novel unmanned automatic machine-based mining and in situ conversion method for the safe and clean exploitation and utilization …

Environment cumulative effects characteristics, sources, approaches and types aroused by coal exploitation are discussed. Based on studies in Lu'an, Pingdingshan, Yanzhou mining areas and so on ...

Practice of methane and coal exploitation in the Luling coal mine. The Luling coal mine is 8.2 km along the strike and 3.6 km along the strip, with an area of 29.52 km 2. There are three main production seams, Nos. 8, 9 and 10 seams from top to bottom, and all of these seams have an outburst tendency (Fig. 4). The average thicknesses of the ...

Coal-measure gas co-exploration and co-exploitation are deemed as an optimum development scheme under certain conditions, and the successful combined production of coalbed methane and tight ...

Coalbed methane (CBM) drilling and completion technologies (DCTs) are significant basis for achieving efficient CBM exploration and exploitation. Characteristics of CBM reservoirs vary in different regions around the world, thereby, it is crucial to develop, select and apply the optimum DCTs for each different CBM reservoir. This paper firstly …

Abstract. Coal resources have always been an important driving force for macroeconomic growth and GDP growth in resource-rich regions. However, this growth …

The global inventory of methane emissions from fuel exploitation (GFEI) was created for the NASA Carbon Monitoring System (CMS). The map shows methane emissions from oil, coal, and gas …

The exploitation and use of coal becomes economically unviable because the market price is not enough to cover the repair of the damage caused. The most serious aspect is that since the companies in the industry do not assume these costs, they are left in the hands of States, communities and ecosystems. ...

Adversely, the ecological environment problem and the high subsidy for coal mining caused by the exploitation of coal resources have aggravated the inequality of income in the sample areas. Additionally, the development of coal resources attracted youth labor from agriculture to the coal industry, which exacerbated the lack of …

The main reason is that continuous large-scale exploitation of coal resources seriously resulted in ground subsidence, damage and loss of arable land, vegetation field reduction and landscape ...

Taking the long view of coal in the United States, one is struck by the steady expansion of output since World War II. Figure 1 shows U.S. coal production since 1949, separating the West (the region west of the Mississippi River) from the East (the region east of the Mississippi). The East is the … See more

Our results transform the knowledge of energy history by extending the upper limit of the systematic exploitation of coal for fuel by approximately a millen-nium, and …

The development of geothermal energy in coalfield can not only improve the temperature environment of coal mining, but also turn waste into treasure through the clean utilization of geothermal energy. Especially, it is of great prospect to store energy in the mined-out area of coalfield under the "dual carbon" goal at present. Herein, in this paper, it was …

Coal mining can be done by two methods, open-pit and underground, where each one has a list of environmental impacts. First, open-pit mining involves digging for coal near the ground surface. ... EO components (local employment and mine income), with a score of +D, followed by the sociological/cultural components (exploitation of the mine …

Introduction. Coal mining in Poland is confined to three coal basins: the Upper Silesian Basin (USB) where coal exploitation has lasted for 250 years, the Lower Silesian Basin (LSB) around Nowa Ruda and Wałbrzych, and the Lublin Basin (LB). Poland is the biggest producer of hard coal in the European Union.

In the uppermost part of coalbearing series waterbearing sandstones predominates. Coal seams thickness varies from few decameters up to 20 m, but only. 19 of them are over 3 m thick and only 5 ...

Although coal has been used for making ornaments since the Late Paleolithic in Europe and the Neolithic in northern China (), the behavior of systematic exploitation of coal for fuel occurred much later.Evidence of sporadic lignite (weakly coalified coal) combustion for fuel has been found at several Late Paleolithic sites in Europe and North …

CNN —. The global energy crisis caused by Russia's war on Ukraine has pushed global demand for coal – the most polluting of all …

Request PDF | Methane and coal exploitation strategy of highly outburst-prone coal seam configurations | Outbursts are the sudden and violent releases of coal and gas from a coalface, resulting in ...

Adversely, the ecological environment problem and the high subsidy for coal mining caused by the exploitation of coal resources have aggravated the inequality of income in the sample areas.

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 …

Hence, coal permeability is an important issue for simultaneous exploitation of coal and gas. Many efforts have been made to clarify gas flow in coal masses. Coal permeability is a complex parameter affected by multiple factors. Somerton et al. analyzed the effect of loading method, stiffness, and degree of crushing on coal percolation.

The top five coal-producing states and their percentage shares of total U.S. coal production in 2022 were: 1. Wyoming 41% West ia 14% Pennsylvania 7% …

Coal miners use two primary methods to remove coal. Surface mining is often used when coal is less than 200 feet underground. In surface mining, large machines remove the topsoil and layers of rock known as overburden to expose coal seams. Mountaintop removal is a form of surface mining where the tops of mountains are …

Coal has long fueled human civilizations. The history of systematic coal fuel exploitation has been traced back to the late third millennium before present (post-2500 B.P.). Although sporadic combustion of coal for fuel was reported in some prehistoric archaeological sites, evidence for the systemat …

Although sporadic combustion of coal for fuel was reported in some prehistoric archaeological sites, evidence for the systematic exploitation of coal for fuel …

Coal exploration encompasses a broad range of activities aimed at finding coal-bearing sediments and deposits that can be exploited [].The process relies on a variety of geological techniques to determine the location and quality of coal, estimate resources, and identify geological factors that will facilitate or constrain coal exploitation and …

Global Energy Review 2021. Coal demand experienced a major decline in 2020. Global coal demand declined 4% in 2020, the biggest drop since World War II. The main driver …

The environment cumulative effects have three obvious characteristics in the coal exploitation. For example, there exits persistence in the time scale for the land subsidence leaded by coal exploitation, waste water and waste solid, etc, and every perturbations is less than the time needed by the environment system recovered from …

Emission from fossil fuel exploitation (oil, gas, and coal) is an important mitigation target because it is estimated to account for about one-third of the global anthropogenic total and could be ...

Coal has long fueled human civilizations. The history of systematic coal fuel exploitation has been traced back to the late third millennium before present (post-2500 B.P.). Although sporadic combustion of coal for fuel was reported in some prehistoric archaeological sites, evidence for the systematic exploitation of coal for fuel

Abstract. Individual countries report national emissions of methane, a potent greenhouse gas, in accordance with the United Nations Framework Convention on Climate Change (UNFCCC). We present a global inventory of methane emissions from oil, gas, and coal exploitation that spatially allocates the national emissions reported to the UNFCCC …

Coal bases are the concentration areas of coal exploitation and use in China in which the carbon emission sources are concentrated, and carbon emission reduction is challenging. However, the ...

the basis of archaeological and textual evidence, the earliest reliable. record for the systema tic exploitation of coal for fuel is from the. Chinese Han Dynasty (2152 to 1730 B.P.) ( 16 ...

Methane and coal exploitation of highly outburst-prone coal configurations are very difficult. When directly applied to such configurations, the underground methane pre-drainage methods, such as pre-working a protective seam and methane pre-drainage, cannot meet the outburst control requirements. Pre-drainage using surface vertical wells …