This study considered the role of coal as China's basic energy source and examines the development of the coal industry. We focused on the intelligent development of coal mines, and introduced the "Chinese mode" of intelligent mining in underground coal mines, which uses complete sets of technical equipment to propose classification …
We explored the impact of coal mining on grain production from the standpoint of energy-food trade-offs in eastern China, aiming to:1) identify the boundary of underground coal mining impact on farmland; 2) construct a spatial gradient model to assess the disturbance of coal mining on crop yield; 3) assess the grain production reduction caused ...
China's total CMM emissions from underground and surface mining, post mining and abandoned mines were 26.81 Tg in the baseline year 2021 (Fig. 2). As half of the CH 4 emissions from coal mining were utilized in 2021 [32], the rest are fugitive …
Large scale underground mining of coal resources in China using longwall mining has resulted in ecological and environment problems, including surface …
But underground tunnel mining, which remains common in countries including China and Australia, has declined sharply in recent decades due to higher costs and risks.
To provide a solution to this problem, the Mining and Designing Branch of the China Coal Research Institute has developed a full set of in-situ stress measurement equipment which includes a small diameter hydraulic fracturing rig that can be easily used in underground coal mines (Kang and Lin, 2007, Kang et al., 2009).
Coal mining safety has been compromised with water inrushes from aquifers either overlying or underlying the coal seams. Detailed studies of the associated hydrogeological conditions in China have led to different approaches to mitigate the water inrush risks from these two types of aquifers—the 'three diagram method' for overlying …
Striking a balance between high-intensity coal mining and environmental protection has been a challenge in the Yushen mining area, which is an important coal production base in China located in an arid and semi-arid ecologically fragile environment. The 122,109 working face of the Caojiatan coal mine was used as a model to …
In this paper the researcher has focused on the comparative study of the underground mines and open cast mines. The data shows that in India the open cast coal mining has dictate very much of 93.26%, nevertheless only 6.74% are underground mines. Apart from India 60% of the other countries have their underground coal …
2. Determinations of strata failure for mining under surface- and groundwater2.1.. In situ borehole observation of strata failureChina has developed some specific methods of coal mining and experimental techniques under aquifers and surface water [2].Over the last 40 years, about 1000 long-wall faces were extracted under …
As the main energy source in China, coal is the main driving force of China's economic development. As shown in Fig. 1, under the influence of relevant policies such as "Replacing coal with gas" and "Replacing coal with electricity", China's coal consumption and production began to decline gradually from 2013 to 2016.However, in …
For example, we estimate that China – where around 90% of coal production comes from underground mines – could reduce its CMM emissions by close to 65% with existing technologies. In Indonesia – where around 90% of coal production comes from surface mines – measures are available to reduce its CMM by only about 25%.
wo separate coal mine accidents have killed 12 people in China over the last 24 hours, state broadcaster CCTV reported, the latest incidents to plague the industry after the government recently ...
Its potential economic benefits are mainly reflected in the saving of environmental costs and the utilization of underground space, which usually cannot be directly expressed as currency. ... Roadway backfill method to prevent geohazards induced by room and pillar mining: a case study in Changxing coal mine, China. Nat Hazard …
The use of underground space energy storage in coal development should be based on the comprehensive consideration of mine well type, space depth, geological structure, lithology characteristics, goaf treatment methods, mining area traffic convenience, and other conditions, systematically analyze the transformability of …
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 …
The Huanghuai Plain coalfield is one of China's major coal resource regions. In 2016, the raw coal production was 329.9 million tons. The Huanghuai Plain mining area features a high ground-water level and is located in high-quality farmland on the eastern plains of China.
China is the number one coal production and consumption country. The coal outputs exceeded 3 billion tons in 2010, accounting for 42 % of the global production (Wang 2009).However, mining and utilization of coal may cause serious environmental impacts such as coal waste disposal, poisonous gas emissions, land subsidence, landscape …
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, …
The study area is in Ili Kazak Autonomous Prefecture, Xinjiang Province, China. As shown in Fig. 1, the area spans 31.1–50.0 km longitudinally and 5.6–11.1 km latitudinally, with a total area ...
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 …
This study performs an in-depth analysis of the environmental impacts of underground coal mining in China. Some technical measures are proposed based on the LCA results to realise clean and efficient coal production and build a green and sustainable energy system. ... Importantly, actual cost might be markedly underestimated without …
The 11–2 coal seam is near horizontal and is mined to a depth of 800 m with a thickness of 3.00 m. The Mining District was designed as 22 panels with an average size of 2650 m × 250 m, an area of 14.25 km 2, and a coal reserve of 42.75 million tons.Panels are mined from west to east, with working faces advancing from north to …
Hu, Z.Q., et al.: Concurrent mining and reclamation for underground coal mining. Journal of China Coal Society 38(2), 301–307 (2013) Google Scholar Huang, Q.H.: Research …
coal output in China comes from the underground coal mining (Hu et al. 1997), which plays significant roles in China's livelihood, industry and economy. Underground coal extraction inevitably causes ground subsidence, which severely disturbs the surface. This situation is even more apparent in East China, which is both the main coal and ...
1 School of Mining Engineering, Anhui University of Science and Technology, Huainan, China; 2 Coal Mine Safety Mining Equipment Innovation Center of Anhui Province, Anhui University of Science and Technology, Huainan, China; Coal is China's main source of energy, and its production causes a certain degree of air, water, …
1. Introduction. China's overall energy structure is characterized by scarcity of gas, limited oil, and relative abundance of coal. In 2022, coal accounted for 56.2% of China's primary energy consumption [1], and the external dependence on oil and natural gas reached 71.2% and 41.2%, respectively.The Chinese Academy of Engineering …
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 …
For a long time, coal has been the main energy source in China, which has occupied the main position in China's primary energy output and consumption, and has had an important impact on China's economic development and social stability (Fang et al. 2018; Song et al. 2016).China's energy occurrence is characterized by poor oil, less …
In the longwall mining method, mine development is carried out in such a manner that large blocks of coal, usually 100 to 300 metres wide and 1,000 to 3,000 metres long, are available for complete extraction (see photograph).A block of coal is extracted in slices, the dimensions of which are fixed by the height of coal extracted, the width of the longwall …
By Syd S. Peng, Huamin Li, Ying Zhou and Jingyi Cheng More Chinese mines are cutting coal from ultra-thick seams in one conventional pass as an alternative to top-coal caving techniques China is by far the largest coal producer and consumer in the world, producing 3.7 billion metric tons (mt) and consuming 3.99 billion mt in 2012, …
All the accidents in our sample occurred in underground coal mines. 2 The Chinese coal mining industry has experienced a large number of accidents. In 2004, China's fatalities amounted to 80% of the world's total, while producing 40% of the world's coal ( Nie et al., 2013 ).
These methods have been widely applied for mine water utilization in coal mines in northern China 23,24,25,26, including water conservation mining in Shennan Mining Area, Shaanxi 27, underground ...
The human cost of coal mining in China. Xiaojun "Tom" Wang grew up in the Chinese province of Shanxi, the world's largest coal producer. Each year, more than a billion …
These methods have been widely applied for mine water utilization in coal mines in northern China 23,24,25,26, including water conservation mining in Shennan …
Coal fires can self-ignite, but mining operations, which expose underground coal to oxygen and produce coal dust, create a much greater risk and are responsible for an estimated 75% of coal fires. "Every country that is coal-producing has coal fires," says Anupma Prakash, a geologist at the University of Alaska who has …
UNDERGROUND COAL MINING: FACTORS, COST, AND TIME CONSIDERATIONS Presented by: Mark A. Williams Executive Vice President – Engineering Services Harrisburg, Pennsylvania ... Number of Surface versus Underground Coal Mines 1978 Total 1,412 1,105 Mine Type No. of Mines % of Total Production (millions …
Coal prices vary by region as well as by grade and quality. The price rebound starting in 2016 ended in 2018, moving in a downward trend in 2019. After stabilisation of prices in …
In China, backfill mining has been selected as an effective approach to realize the green mining of underground coal resources, where backfill materials are the major factor in the development of …
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.