open pit coal mining

Open-pit mining significantly impacts land resources and the ecological environment [].The largest artificial structure in the open-pit coal mining area is the mine dump formed by stripping off the overlying topsoil and strata of the coal seam and then stratifying and stacking due to open-pit mining, which will cause land occupation, soil …

This study aims to model and map ecological security and restoration priorities in an intensive open-cut coal mining region accounting for spatio-temporal …

Baorixile open-pit coal mine is situated (as shown in Fig. 2)7,28. e mine's external perimeter spans a 50.72 km2 region, measuring 5.86 km in width from north to south and 10.98 km in length ...

Open-pit mining involves removing the cover from the ore body and obtaining the required minerals. This activity can seriously damage the surface landscape of the mining area and the ecological environment of the entire mining area. ... Liu XY, Zhou W, Bai ZK (2016) Vegetation coverage change and stability in large open-pit coal mine …

Open-pit mining, also known as opencast mining, is a surface mining technique that extracts minerals from an open pit in the ground. This surface mining technique is used when mineral or ore …

Open-pit coal mining plays an important role in supporting national economic development; however, it has caused ecological problems and even seriously impacted regional ecological stability. Given the importance of maintaining ecological stability in semi-arid coal mining areas, this study used a coupling coordination degree …

7.2.1: Open Pit Mining. Open pit mining almost always applies to non-coal materials, mostly metal and aggregate mining. However, near-surface steeply dipping coal seams are extracted using open pit mining. Reclamation, i.e., returning the land to an acceptable standard of productive use of the open pit mine is deferred until the mine closes.

Open pit mining is defined as the method of extracting any near surface ore. deposit using one or more horizontal benches to extract the ore while dumping. overburden and tailings (waste) at a ...

The Wucaiwan open-pit coal mine is located in the Western margin of Eastern Junggar Coalfield (Fig. 1 B), where the Jurassic Badaowan, Sangonghe, and Xishanyao Formations are the coal-bearing strata (Fig. 1 C).Among these, the Middle Jurassic Xishanyao Formation is the predominant coal-bearing unit, and, it is made up …

The open pit mining industry is an important basic industry related to China's economic lifeline and energy security, China's open pit coal production has …

Methane emissions from coal mining are well studied and expected to reach approximately 784 Mt ... While application of such technologies can be limited at operations such as open-pit mining, ...

Coal mining in this Canadian province began more than a century ago, though the methods changed in the 1980s, when underground mining was largely abandoned for open pits.

In the past 40 years, large-scale, open-pit mining has come to dominate the region — a technique that involves stripping away layers of rock to get at coal deposits deeper in the earth. A deformed cutthroat trout with its gill cover missing, found in the Elk River downstream of several major coal mines.

The Hongshaquan open pit coal mining area is located east of the Zhundong Economic and Technological Development Park, and east of the Junggar basin. The terrain is high in the southeast and low in the northwest . The area is a typical continental arid desert climate with an average annual temperature of 7 °C and …

the landslides at the Shengli open-pit coal mine (Zhang et al., 2010), Fuxin Haizh ou open-pit c oal mine (He et al., 2011), and the Fushun West o pen-pit c oal mine (Nie et al., 2017) are typical ...

The Manglai open-pit coal mine is located in the northern part of the Inner Mongolia Plateau, as shown in Figure 6A–C. Its northern side consists of a low mountain and hilly area, and its southern side consists of a Neogene terrace high plain. The terrain in the mining area is high in the northeast and low in the southwest, with an average ...

The open-pit coal mining has the characteristics of high recovery and high safety factors, open-pit coal mining can bring huge economic benefits to the mining …

Coal resources have always been in a very important position in the structure of nonrenewable energy in the world [1,2].China is the main coal energy consumer in the word and coal mining has made …

Open-pit mining is practical when the ore-bodies of the rock are large and located closer to the surface. Advantages of open-pit mining include: Powerful trucks and shovels can be …

However, the level of eco-environmental destruction in open-pit mining regions is ten times higher than in other mining areas (Zhou et al., 2018). According to statistics in 2018, China has 67,700 mines with an annual mining capacity of more than 30 billion tons, which destroy over 4 million hectares of land, and tailings waste rock …

An open-pit mine at Decazeville, with a coal fire that started by spontaneous combustion. Self-heating from exothermic reactions and subsequent coal combustion in open-pit mines is common, although there are many other possible causes of combustion. These include lightning strikes, people smoking, and mining accidents due to welding …

The Chenbaerhuqi coal field in Hulunbuir City, Inner Mongolia Autonomous Region of China, is where the Baorixile open-pit coal mine is situated (as shown in Fig. 2) 7,28.The mine's external ...

Therefore, two thirds of the mines are mined by the open-pit mining mode. China is the world's largest coal producer and consumer. In 2015, the coal output in China is 3.75 billion tons, accounting for 47% of the world's total. However, most of the open-pit coal mines are distributed in the ecologically fragile areas of the Loess Plateau.

Open-pit coal mining often involves dividing the mining areas into multiple horizontal layers, which results in a stepped spatial configuration that facilitates sequential extraction from top to bottom and, consequently, the generation of expansive mining faces and steeper excavation slopes (Li and Zhang 2021).This combination, together with the …

The open pit mining industry is an important basic industry related to China's economic lifeline and energy security, China's open pit coal production has been maintaining good growth momentum.

Open-pit mining, also known as opencast mining, is a surface mining technique that extracts minerals from an open pit in the ground. Open-pit mining is the most common …

1 Introduction. A prominent place is held by open-pit coal mines in the worldwide coal industry. The share of open-pit coal mining in major coal-mining nations like the United States, Australia, Russia, and India is more than 50%, and some countries reach more than 90% (He et al., 2006; Zheng et al., 2014; Wang et al., 2022).The main …

For example, open-pit coal mining generally cause great changes in the terrain. Second, this paper selected four critical ecosystem services, however, there are other services such as air quality regulation and noise regulation that are important to mining, which should be considered in future research. In addition, alternative more …

Black Thunder operates several individual open pits within its enlarged concession area, using five large draglines for overburden handling. The dragline fleet includes Ursa Major, the largest of the three, a Bucyrus-Erie (B-E) 2570WS model weighing some 6,700t. ... Processing at Black Thunder mine. Coal is hauled to a near-pit dump …