The mine adopts the shaft mining mode and its coal reserve is approximately Mt A comprehensive mechanised coal mining method with a production capacity of Mt /a and gangue rate of 15% is adopted It is estimated that the absolute gas emission is approximately m 3 /min Supplies are purchased from a neighbouring city
Coal mining requires a significant amount of water in China accounting for approximately 73% of the nation s total energy related water withdrawal Lin et al 2020 and there are notable regional disparities in water usage for coal addition the process of coal extraction generates a large volume of wastewater which has a detrimental impact on
The destruction of arable land caused by coal mining in coal grain compound areas is a major bottleneck restricting grain production increase The spatiotemporal correlation between the decline in cultivated land quality and crop growth deterioration due to mining subsidence still needs to be clarified This study employed the CDR AVHRR NDVI dataset and
The coal production the in situ virgin methane content methane content of coal seam at the beginning of mining and the residual methane content basically can be collected from the China coal industry yearbook released to the public and the methane geological map of the coal mines In general the coal reserves of every pre drainage block in
The proposed method was successfully applied in the Huainan coal mining area in China The method proposed in this study with its universal applicability provides a new conceptual and technical approach for researchers in the field In addition it can provide measured data for research of mining subsidence in areas covered with thick
In the 1960s Prof Minggao Qian proposed the masonry beam theory MBT Qian 1981 Qian 1982 for the first time in China and presented a full discussion on the transmission and equilibrium method of overburden pressure in mined out areas by using reserved coal this basis the 121 mining method was established namely one
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
2 Coal mine water treatment in China Coal mine water CMW is the groundwater around the mining area and roadways sometimes it contains a small amount of infiltrated surface water As the country with the highest coal mine output China also has a higher produc tion of coal mine water to be dealt with There are mainly
COAL MINING IN INDIA TECHNOLOGY CHALLENGES AND WAY FORWARD B P Singh Abstract Though India is the 3rd largest producer of coal next to China and USA 96% of the production comes from opencast mines but hardly 4% from underground methods is the only option left to the mine planners to make a coal mining project economically
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 backfill mining In order to provide a better reference for further research and development of backfill mining the experience and research achievements are reviewed in this
Aiming at the problem of difficult mining of coal resources under buildings railroads and water bodies in northern Shaanxi China a narrow strip filling mining NSFM method is proposed
In recent years the development of coal mining technology has not only improved the coal mining efficiency and recovery rate but also promoted the economic development Wolde Rufael 2010; Bhattacharya et al 2015 Due to the negative externalities of coal mining Bai et al 2019a on the basis of green coal mining many scholars have put
In mining of inclined coal seams in Tangshan coal mine of Kailuan group gateways on either end of a panel were both typically located along the floor and a gateway pillar between adjoining panels was left unmined between adjacent panels to ensure stability thus forming a planar mining system According to the practice however it turned out that this conventional mining system
The evolution of thick coal seams mining methods in China Qiao Jianyong1 2 Wang Zhiqiang 1 Zhao Jingli1 1China University of Mining and Technology Beijing Ding Xueyuan Road Haidian District Beijing China 100083 2Beijing University of Posts and Telecommunications 10 Xitucheng Road Beijing China 100876 article is shown that the main methods
During the past 20 years due to the rapid development of China s economy the amount of coal mining activities has rapidly increased which has led to a large increase in the number of mined out areas and electromagnetic methods have become the main means of hydrogeological investigations and deep explorations in mine out coal areas During the past 20 years due to
For coal mines located in water starved western regions of China this jeopardizes the sustainable coal mining development local eco environment and agricultural production
Now China has stepped up efforts to protect the environment which has led to the closure of coal mines in overlapping areas Xiao et al 2021a In addition in some resource based cities disorderly UCM has also triggered the resource curse and dutch disease Khan et al 2020 For example surface ponding caused by mining induced subsidence leads to
During the past 20 years due to the rapid development of China s economy the amount of coal mining activities has rapidly increased which has led to a large increase in the number of mined out
Spectroscopy has been extensive used in coal identification and analyses Zeng et al [17] [18] used computer and spectral data to monitor and control the coal moisture of power station boilers and obtained good control effects Hu et al [19] based on spectroscopy and a least squares support vector machine designed a coal quality analysis method They firstly
