Air Pollution Emissions 2008–2018 from Australian Coal Mining
— 1. Introduction. Coal mining is a hazardous occupation, with high risks for both accidents [] and occupational diseases, especially respiratory disease [2,3], compared to other types of work.Occupational disease risks are not restricted to underground miners but extend to surface mining workers as well [4,5].Surface mining workers are exposed …
Coal mining
— Coal mining - Underground, Surface, & Drilling: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in …
Experimental and numerical simulation study on forced …
— In recent years, the mechanization level of coal mining has been greatly improved, and the safe and efficient coal mining is becoming mature (Ji et al. 2023; Wang et al. 2020; Yu et al. 2023).However, high concentration dust, which affects the safety of coal mine production and threatens the occupational health of coal mine employees for a …
Research on coal mine safety management based on digital …
— According to Fig. 3, among all types of coal mine accidents, roof accidents and gas accidents cause the largest number of deaths. Although the number of deaths in roof and gas accidents has decreased significantly in recent years, they still account for the highest proportion of safety accidents in all types of coal mine accidents.
A systematic review of occupational exposure to respirable coal mine …
— Respirable coal mine dust (RCMD) is a mixture of more than 50 elements and their oxides. It is estimated that 40%–95% of respirable dust in the underground coal mine is pure coal, and the rest contains particles originated from cutting roof and floor rock, diesel exhaust from equipment, and rock dusting (Walton et al. 1977; NIOSH …
Coal Mining: How Is Coal Mined?
— Coal obtained in different places is not the same and varies widely depending on the nature of the soil and geographic conditions. There are two major types of coal mining: underground mining and surface mining. Coal mining satiates roughly 1/4 of our global energy demands, and it is coal that has powered America's power needs for …
Coal Mining: How Is Coal Mined?
— Coal mining (also called colliery) is the process of extracting coal from the ground's surface or from deep underground. Coal miners literally raze entire mountain …
Coal Mining and Processing
The overall coal mining process consists of several sequential stages: (1) exploration of a potentially economic coal seam to assess minable reserves, environmental issues, marketable reserves, potential markets, …
Coal
Coal Mining Underground Coal Mining This drawing depicts the room and pillar method of underground mining. Most underground coal is mined by the room and pillar method, whereby rooms are cut into the coal bed leaving a series of pillars, or columns of coal, to help support the mine roof and control the flow of air. Generally, rooms are 630 ...
Mining
— Mining is the process of extracting useful materials from the earth. Some examples of substances that are mined include coal, gold, or iron ore.Iron . ore is the material from which the metal iron is produced.. The process of mining dates back to prehistoric times.. Prehistoric people first mined flint, which was ideal for tools and …
Coal mining in northeast India: an overview of …
— Northeast India has a good deposit of sub-bituminous tertiary coal. The northeast Indian coals have unusual physico-chemical characteristics such as high sulfur, volatile matter and vitrinite content, and low ash content. In addition, many environmental sensitive organic and mineral bound elements such as Fe, Mg, Bi, Al, V, Cu, Cd, Ni, Pb, …
Coal as an energy source and its impacts on human health
— Coal mine workers smoke and consume more alcohol than non-occupationally exposed subjects, ... Geochemistry of trace elements in Chinese coals: a review of abundances, genetic types, impacts on human health, and industrial utilization. Int. J. Coal Geol., 94 ... Elsevier Science (2014), 10.1016/B978-0-12-396972-9.00005-7. Coal and …
Home | International Journal of Coal Science & Technology
The International Journal of Coal Science & Technology is a peer-reviewed open access journal. It focuses on key topics of coal scientific research and mining development, …
The Challenges of Reusing Mining and Mineral-Processing Wastes
— Mining and mineral-processing wastes—the solid and liquid materials generated after mining and ore processing at or near mine sites ()—have no current economic use.A number of environmental problems are associated with the disposal of this waste, including contamination of streams and lakes and pronounced landscape …
Advancing respirable coal mine dust source apportionment: …
— Exposure to respirable coal mine dust (RCMD) can cause chronic and debilitating lung diseases. Real-time monitoring capabilities are sought which can enable a better understanding of dust components and sources. In many underground mines, RCMD includes three primary components which can be loosely associated with three major …
What We Know About Deep-sea Mining — and What We …
— Mineral nodules on the seafloor in the Clarion-Clipperton Zone, a key area of interest for deep-sea mining. Photo by ROV KIEL 6000/GEOMAR. In the case of polymetallic nodules — which are currently the primary focus for deep-sea mining — mining vehicles would collect mineral deposits from the surface of the seabed, not unlike a …
Spatial variability of soil moisture in a mining subsidence …
— The current study investigated the impact of coal mining on deep soil moisture from the perspective of the absolute value of soil moisture. A combined classical statistics and multi-dimensional geo-statistics approach was employed to analyze the temporal and spatial changes in soil moisture from 0 to 10 m in the mining face of the …
Coal mining
— Coal mining - Underground mining: In underground coal mining, the working environment is completely enclosed by the geologic medium, which consists of the coal seam and the overlying and underlying strata. Access to the coal seam is gained by suitable openings from the surface, and a network of roadways driven in the seam then facilitates …
India's coal mining plan undermines climate goals | Science
— To protect the environment and foster a healthier planet, the Indian government should abandon its underground coal mining plan. India must uphold its …
Mines and Mining
— Let's Talk Science. December 7, 2022. 6.18. ... Left: Coal mine in use. Right: Coal mine after land reclamation (Source: ... in mining. Canadian mines produce more than 60 different minerals and metals. …
Effects of multi-factors on the spatiotemporal variations of …
— Effects of multi-factors on the spatiotemporal variations of deep confined groundwater in coal mining regions, North China. Author links open overlay ... Using δ34S–SO4 and δ18O–SO4 to trace the sources of sulfate in different types of surface water from the Linhuan coal-mining subsidence area of Huaibei, China ... Procedia Earth and ...
25.1 Exploration: Finding minerals | Mining of mineral …
One of the methods used in underground mining is called room and pillar, and is often used for mining coal. Part of the mine is open to the surface and part of it is underground. The coal face is dug out, but pillars of coal are left behind to keep the tunnels open and support the roof. Machines called continuous miners are used to remove the coal.
Advances in coal mining technology and sustainable mining …
— The RNP (board-and-pillar) mining method with partial pillar extraction using four CMs was applied to extract coal (Mining Technology, n.d.). Other active coal mining operations in Canada are Cardinal river operations producing around 2 Mt of coal/year, coal valley mine of Edson Alberta has a production of approximately 3 Mt coal/year, etc. The ...
Understanding the impact of coal blending decisions on the prediction
— Coal rank is a prevalent feature in both coke quality prediction models and coal blending decisions, particularly in the form of the mean maximum vitrinite reflectance (R v,max; North et al. 2018b). This prevalence is likely due to the relationship between coal rank and other key coal properties such as fluidity (Coin and Broome 1997 ; Ryan et ...
[INFOGRAPHIC] 3 Types of Coal Mining
— In addition, nearly 60 percent of all electricity in the United States is generated from coal. • [VIDEO] What Coal Mining Looks Like Today • [SLIDESHOW] The Life of an Iranian Coal Miner. The methods for mining coal depends on the location of the deposit. The three primary types are surface, room & pillar and longwall mining.
Digging deeper: Mining methods explained
The underground mining methods we use include room and pillar, narrow vein stoping and large-scale mechanised mining. Room and pillar mining is a style of mining where tunnels are driven in a chess board pattern with …
Coal Resources, Production and Use in China
— The distribution of China's coal resources is very uneven, with over 80% located in the north and north west of the country. However, the main consumption areas are in the east and south, meaning there is great discord between production location and area of demand. Table 10.1 shows the distribution of different types of coal resources …
India's coal mining plan undermines climate goals
— Carbon neutrality depends on the reduction of fossil fuel usage and the development of renewable energy (1, 2). At the 2021 United Nations Climate Change Conference (COP26), India signed an agreement to reduce coal and enhance its renewable energy capacity to 500 GW by 2030, with the goal of achieving net-zero carbon …
Coal | U.S. Geological Survey
— The gas emission zone liberates and accumulates significant amounts of coal mine methane as a by-product of active mining. In most active mines, coal mine methane is controlled by wellbores, called gob gas ventholes. Despite the presence of these wellbores, it is not possible to capture all of the methane generated within the gas …
What are the main methods of mining? | American …
There are four main mining methods: underground, open surface (pit), placer, and in-situ mining. Underground mines are more expensive and are often used to reach deeper deposits. Surface mines are typically used for more shallow and less valuable deposits. Placer mining is used to sift out valuable metals from sediments in river channels, beach …
Coal and Coal Mining
Coal Mining Methods (cont.) Underground mining methods: room and pillar mining – coal is extracted by driving a series of entries (rooms) that are connected periodically by …
Dynamics of carbon sequestration in vegetation affected by …
— Surface coal development activities include mining and ecological restoration, which significantly impact regional carbon sinks. Quantifying the dynamic impacts on carbon sequestration in ...
Mining Basics | American Geosciences Institute
The mining process is used to separate rock or ore from surrounding rock. There are four main mining methods: underground, open surface (pit), placer, and in-situ mining.The method used depends on the type of mineral resource that is mined, its location beneath the surface, and whether the resource is worth enough money to justify extracting it.
Methane production from coal by a single methanogen | Science
— Coal-bed methane (CBM), a form of natural gas distributed in coal seams or adjacent sandstones, is a relatively untapped energy source with a large potential: The global reserves in 2014 were estimated at 50 trillion m 3, equivalent to 11% of conventional natural gas resources ().Large-scale CBM production has been implemented in the …
Innovation in the Mining Industry: Technological Trends and …
— Innovation plays a critical role in the mining industry as a tool to improve the efficiency of its processes, to reduce costs, but also to meet the increasing social and environmental concerns among communities and authorities. Technological progress has also been crucial to allow the exploitation of new deposits in more complex scenarios: …