Advantages of Backfill Mining Method for Small and …
At present, many SM mines in China still use outdated mining methods such as the retention method, room and pillar method, and crumbling method for ore body mining [7,8]. ... Balusa, B.C. Analysing the Role of Safety Level and Capital Investment in Selection of Underground Metal Mining Method. Int. J. Min. Geo-Eng. 2021, 55, 125–131.
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Concurrent mining and reclamation for underground coal mining
Large scale underground mining of coal resources in China using longwall mining has resulted in ecological and environment problems, including surface subsidence that is considered serious due to competing interests of prime agricultural lands, food security, and regional economic development. The subsided lands must be rehabilitated soon after mining to …
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Underground Mine Development
In the thirteenth century BC, China used underground mining methods in Tonglu Mountain, Hubei Province (see mining and mineral processing techniques in ancient China). Eighteen ancient underground mining areas have been excavated all over the ore bodies in Tonglu Mountain mining area, showing the underground mining scale and various underground ...
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Research and practice of intelligent coal mine technology …
Given the coal resources in China, underground mining is the main method of extraction, with open-pit mining accounting for less than 15% of coal production. Scientific …
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Decreasing methane emissions from China's coal mining …
Coal mining in China largely explained the increasing trend in global anthropogenic CH 4 emissions from 2000 to 2012 ... In this study, Tier 2 method proposed by the IPCC is adopted to estimate emissions from underground mining and post underground mining. Tier 1 method is adopted to estimate emissions from surface mining, post surface mining ...
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Underground mining of thick coal seams
This paper reviews underground mining methods for total thickness of a thick coal seam in single lift (TTTCSSL). ... Due to different geological and techno-economical reasons, longwall route to win the roof coal band is popular in China while the Indian coal mining industry is, mainly, practicing B&P route for winning the roof coal band.
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Quantify the extensive crop damage and grain losses caused …
But 85% of coal production comes from underground mining in China. The high groundwater table areas in eastern China are important coal conserves and significant grain production areas. ... Our research proposed a reasonable framework to evaluate the farmland damage and quantify the crop loss by mining. The method is simple and remote sensing ...
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Overview of Solid Backfilling Technology Based on Coal …
China is the world's largest coal producer country. However, large-scale coal mining has led to severe environmental pollution issues such as surface subsidence and gangue piling up. The gangue discharging amount has ranked the first in the world and coal mine enterprises are facing enormous discharging reduction pressure. This paper summarizes the research …
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Life cycle assessment of underground coal mining in China
Therefore, this study aims to (1) analyse the environmental burden of a typical underground coal mine in China using the LCA method; (2) obtain quantitative results of life cycle impact assessment (LCIA), including uncertainty information; and determine the key impact categories on the environment; (3) identify the key processes that cause ...
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Intelligent Mining Technology for an Underground Metal …
Deep underground mining will become the trend of metal mining in China [1]. To overcome the disadvantages of traditional mining methods, such as excessive resource consumption, poor operating environments, ... An underground mining truck is the main transport vehicle for underground trackless mining, and has the advantages of mobility ...
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Understanding Underground Mining Methods | Value The …
Methods used in underground mining are generally classified based on the type of deposit being mined and the type of ground conditions at the site. The three main types of underground mining are room-and-pillar, cut-and-fill, and block caving. The process of underground mining is aimed at ensuring safety, economic viability, and minimal waste.
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Coal Mine Solid Waste Backfill Process in China: Current …
Coal mine solid waste backfill is a coal mining method employed to safeguard subterranean and surface geological formations, as well as water resources, against impairment. It stands as a pivotal technical approach for realizing ecologically sustainable mining endeavors, aiming to address China's predicament of 'three down' coal pressure, coal gangue emissions, …
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Engineering geology, ground surface movement and fissures induced …
As one of the advanced underground mining methods, cut-and-fill mining is increasingly applied in China and some other major mining countries owing to the following advantages: (1) it effectively controls rock pressure and ground movement; (2) it protects the ground environment and (3) disposal of a huge amount of solid wastes is thus made ...
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Key Engineering Technologies to Achieve Green, Intelligent, …
Common mining methods in underground metal mines are divided into three categories—namely, the open stope method, the caving method, and the filling …
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The Recent Progress China Has Made in Mining Method
The shrinkage method is one of the earliest and most widely used mining methods in underground mining in China, with the advantages of a simple structure, convenient management, small development engineering, easy to master process, and easy to acquire …
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Climate Impact of China's Promotion of the Filling Mining Method
China recently implemented a "Green Mine" policy focused on promoting the filling method, aiming to mitigate the environmental impacts of underground mining; nevertheless, quantitative ...
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The evolution of thick coal seams mining methods in …
drift and others. It is expected that this method will be widely used for underground coal mining in deep mines in China with difficult mining and geological conditions. 1 Introduction The overall balance of China's produced energy resources can be summarized as "Rich coal reserves, poor oil reserves, and rare natural gas".
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The evolution of thick coal seams mining methods in China
Underground mining accounts for about 95% of all coal production in China. At the same time, 44% of coal is extracted from thick seams. Thus, the development of thick coal seams is of …
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Life cycle assessment of underground coal mining in China
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 …
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Guidance and review: Advancing mining technology for …
This paper summarizes the current status and challenges of open-pit mining, underground mining (including deep underground mining, green underground mining of …
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Engineering Geology
The construction of the Chengchao Iron Mine (located in Ezhou City, Hubei Province, China) began in January 1958. In November 1969, construction came to an end and the large-scale excavation of the underground orebodies was started using the sublevel caving method without sill pillars (Xia et al., 2016a, Xia et al., 2016b; Cheng et al., 2017; Deng et al., …
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Underground Disposal of Coal Gangue Backfill in China
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 the ground surface as waste heaps, it occupies large areas of land and cause environmental pollution. This paper summarizes the existing gangue backfilling …
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Application of Numerical Simulation Methods in Solving …
Thus, the backfill mining method is widely used in various complex mining conditions; for example, China has advocated this mining method under these 'three mining condi-tions': mining ore bodies under water, railways, and roads and buildings [7,9]. Accordingly, at the stage of a feasibility study, it is indispensable to research mining ...
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The Recent Progress China Has Made in Mining …
The sublevel caving method is a widely used mining method in underground mines, especially in metal mines, and in practical application, the parameters required for its typical scheme design include stage height, …
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Coalbed methane emissions and drainage methods in underground mining …
Coalbed methane (CBM) drainage in underground coal mining is of significance to guarantee mining process safety and bring valuable environmental benefits, as the drainage could help to eliminate methane-related accidents, reduce greenhouse gas (GHG) emissions and provide a source of clean energy. Due to the manifold benefits, extensive investigations have …
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Underground Mine Development
In the thirteenth century BC, China used underground mining methods in Tonglu Mountain, Hubei Province (see "Ore Mining, An Introduction on" and "Mining and Mineral …
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Properties and Application of Backfill Materials in Coal Mines in China
Coal is the basic resource underpinning energy generation in China, however, constant, large-scale mining of coal results in many problems such as ecological destruction of mining areas. As a result, backfilling of solid waste underground is proposed to control strata and surface subsidence and to protect the environment. At present, these materials, such as …
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Development status of coal mining in China
The results show that 87% of China's coal is mined by underground methods, with an average production capacity of 0.93 Mt/a per mine. Open pit mining accounts for 13%, with an average mine ...
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Sustainable Development of Underground Coal Resources in …
Underground coal mining using longwall techniques is very common in China [13] and accounts for 90% of coal production [14]. Due to different geologic conditions, other major …
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Mining footprint of the underground longwall caving extraction method
The main objectives of this study were: (1) to investigate the surface subsidence law in the entire minefield of the Hengyuan Mine using a probability integral method; (2) to analyze the spatial characteristics and quantify the sources of heavy metals in mining areas using GIS and multivariate statistical analysis methods (MSAMs); and (3) to reveal the accumulation …
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