solution for coal mining in water areas

Abstract. A substantial reduction in groundwater level, exacerbated by coal mining activities, is intensifying water scarcity in Western China's ecologically fragile coal mining areas. China's national strategic goal of achieving a carbon peak and carbon …

Mine wastewater drained from coal mines pollutes the surface and groundwater and endangers water and soil around the mining areas (Zipper et al. 1997;Peksezer-Sayit et al. 2015; Zhengfu et al ...

The present research makes an effort towards awareness of the impact of underground coal mining on water environment around the Barapukuria coal mining area, Dinajpur by direct field investigation, questionnaire survey and laboratory analysis. For this research, the three foremost errands have been mulled over which are the water …

It is of great practical significance to explore the efficient water resources allocation model based on ecological environment priority in coal mine areas. In this paper, an open-well coal mining area is …

In order to explore the effective method for the comprehensive evaluation of ecological environment quality of environmental pollution governance in China's coal mining areas, based on the review of domestic and foreign research literature and the requirements and actual situation of environmental pollution control in China's coal …

Therefore, how to reduce the dust concentration generated in coal mining and ensure the safe coal production and the health of personnel has attracted the attentions of scholars. Many dust removal techniques for coal mining, such as ventilation, water spray, dust collector, wet dust collector, personal protection and so on, have been …

The U.S. Energy Information Administration estimates (as of October 2022) that in 2021, CO 2 emissions from burning coal for energy accounted for about 20% of total U.S. energy-related CO 2 emissions and for nearly 60% of total CO 2 emissions from the electric power sector. In the past, fly ash was released into the air through the smokestack ...

Zhang et al. [19] analyzed the annual runoff time series of Kuye River in Shenfu mining area by using a statistical method and discovered that the average annual runoff in the coal mining area was ...

Credit: C. Alpers and D.K. Nordstrom, USGS. In a U.S. Geological Survey (USGS) study, the most acidic waters ever measured are percolating through an underground mine near Redding, Calif. Hot acid solutions, more concentrated than battery acid, are dripping off colorful mineral stalactites in the abandoned copper and zinc mine …

Most of Colorado's mineral mining activity predates the passing of current environmental regulations in the 1970s and 1980s. Before this time, many mining companies did not sufficiently restore mined areas, leaving physical hazards and environmental impacts. High levels of metals released to streams from acid mine drainage can harm fish and ...

The surface water bodies are mainly transit rivers and coal-mining collapse water in the area, and the cross rivers in the area are mainly Huihe. Linhuan coal-mining subsidence area is formed by coal-mining collapse, and its shape is irregular. ... The completely dissolved solution of BaSO 4 was filtered through a 0.22-μm filter, and …

Coal has long occupied the dominant status in the energy consumption structure of China, a series of water environmental issues have been caused from mines construction, coal mining, washing ...

The Cl – in the water increased by 83.5 mg/L (dosage: 10 g/L) after adsorption, namely, ∼42.6% of chloride on C-PACl was dissolved into the solution, this would cause less chloride release into the coal mining water. In addition, aluminum dissolved into the solution was 0.12 mg/L, means that 0.13% of aluminum was dissolved …

On the premise of analyzing and studying the stratigraphic sedimentary environment in the mining area in detail, it is of great significance for the realization of "coal water" dual resource mining in the mining area to divide the types of roof water disaster in the mining area and study the formation mechanism of mine water disaster caused by ...

The study area has a large number of coal and coal chemical enterprises, mainly concentrated above the midstream area, with a total of 18 coal mines and a total wellfield area of 343.43 km 2. Due to coal mining activities, water pollution in CRB has become increasingly serious in recent years.

the study suggests that mining areas need to be recl aimed r ight after mining. According to Jagwan i et al ., (2016) land degrad ation due to coal mining operation is perhap s the most serious ...

Under the exploitation of high-intensity coal resources, approximately 31 million tons of mine water are produced annually in the Shendong mining area, of which only about 25% is utilized [20,21].

Water resources protection and management are. urgently needed for dealing with the contradiction between wat er supply and demand in coal mines in northern. China 19–22. Protection of water ...

Maps are presented showing areas in the eastern United States where concentrations of chemical constituents in water affected by coal mining (pH, dissolved sulfate, total iron, total manganese ...

Coal mining. Mining operations can negatively impact water supplies, often with long-lasting effects. The fundamental issue involves contamination of nearby rivers, lakes, and aquifers by what comes out of …

In high groundwater level mining areas, subsidence resulting from mining can lead to waterlogging in farmland, causing damage to crops and affecting their growth and development, thereby affecting regional food security. Therefore, it is necessary to restore agricultural production in the coal mining subsidence water areas in the densely …

Revealing the water use pattern of plants influenced by coal-mining-caused land subsidence is crucial to understand plant–water interactions and guide ecological restoration. However, available information on herbaceous plants, the dominant species in most arid and semi-arid regions with abundant coal resources, remains inadequate. We …

The model is calibrated with reference to the mining period of stable mine water inflows (steady-state solution). To calibrate the storage coefficients that determine the course of the transient process of pit flooding, we imitated the flooding period from 2010 to 2021 in the model. ... (2022) Triggered seismicity in a flooded former coal ...

Assuming that the original rock stress is γH, then the peak value of the abutment pressure in the upper and lower coal bodies along the goaf's inclination direction can be expressed as k 1 γH and k 2 γH.The load in the rising area of the abutment pressure (l 2, l 3) can be equivalent to the triangular linear load F 2 (x), F 4 (x) from the coal wall …

The mine water has low pH (acidic) and high amount of turbidity, iron, sulfate, and total hardness. This water is capable of dissolving metals, such as copper, aluminum, cadmium, arsenic, lead, and mercury in the active mining areas. Similarly, it also leaches these metalliferous constituents from the mineralized rocks.

Poland still relies largely on coal for energy generation, which creates environmental problems connected to the mining process, particularly the issue of saline waste water discharge. Membrane-based zero liquid discharge systems can be employed to recover important resources from coal mine waste waters, such as demineralized …

The number 50 denotes the total volume of chromogenic solution. ... M. F. Coal mining impacts on water environs around the Barapukuria coal mining area, …

Water quality and risks of multi-ions in waters at the river catchment scale in Yulin were investigated. • The dominant anions in waters were HCO 3 −, SO 4 2−, Cl −, and cations were Ca 2+, Na +, Mg 2+.. The anthropogenic toxic metals in waters were strongly associated with coal mining and coal combustion activities.

The study reveals the impact of coal mining on hydrochemical. It provides a scientific basis for the protection and management of water resources under coal …

Analysing the annual average values of the water budget of the GBGQ, the recharge component from water surface precipitation accounts for 86.6%, runoff from no …

Its devastating impact is visible worldwide. 1. Toxic water. Coal mining, washing and burning all release toxic chemicals and heavy metals into the environment, by the truckload. For every tonne of coal mined, between 1 and 2.5 cubic meters of groundwater is made unusable. A Greenpeace investigation found that almost half of the …

Study area. The study region, Dongsheng mining area, has an area of over 500 square kilometers (Fig. 1), where three kinds of water resources are available, including surface water, groundwater ...

Pumping water from rivers is a method being used more frequently in coal-mining areas, despite its shortcomings. Women fetch water from an opening made by residents at a dried-up lake near …

In this study, a groundwater management model of a coal mining area is developed to optimize mine drainage, water supply and environmental protection. The …

Protection of water resources in the processes of coal mining includes mainly three methods for achieving effective utilization of mine water: water …

East China is a highly aggregated coal–grain composite area where coal mining and agricultural production activities are both flourishing. At present, the geochemical characteristics of dissolved inorganic carbon (DIC) in groundwater in coal mining areas are still unclear. This study combined hydrochemical and carbon isotope …