hypothesis on coal mining

Biotechnology of Microorganisms from Coal …

Abstract. Simple Summary. Despite the wide perception that coal environments are extreme habitats, they harbor resident microbial communities. Coal …

An Overview of Carbon Footprint of Coal Mining to Curtail

Despite the trend of a transition to "clean" energy, the coal industry still plays a significant role in the global economy. The constant need for raw materials and energy for production leads to an environmental crisis—an increase in the content of greenhouse gases in the atmosphere, especially in the mining regions. The purpose of this study was …

In Australia's coal country, the mines are booming …

The mine has drawn closer ever since. It now stands about 2.5 miles away, close enough to taste the dust blown off its ever-growing piles of overburden, the earth excavated in pursuit of coal.

Mechanism of Rock Bursts Induced by the Synthetic Action …

When studying the rock burst mechanism in subvertical extra-thick coal seams in the Wudong coal mine in Xinjiang, China, most studies focus on rock pillars, while the effect of the roof on rock bursts is usually ignored. In this paper, a rock burst mechanism in subvertical extra-thick coal seams under the control of a "roof-rock pillar" is proposed. …

Special Issue "Process Safety in Coal Mining"

This Special Issue of Processes, titled "Process Safety in Coal Mining", collects the latest work of the main researchers in this field, covering the theory and technology behind coal mine disaster prevention and control, safety management and control in the process of coal mining, mineral processing and green-mining engineering, …

Working in a Coal Mine

The walls of a coal mine aren't black—they're white, covered with many layers of crushed powdered limestone called rock dust, required by law to suppress the omnipresent coal dust. The mine is a very cold, wet and dark place. Ground water leaks through the rock, and pumps run continually to remove the water. Large ventilation fans …

Impact of the Coal Mining on the Spatial Distribution …

32 Citations. 1 Altmetric. Metrics. Abstract. Coal mining areas are prone to hazardous element contamination because of mining activities and the resulting wastes, …

Mortality in Appalachian Coal Mining Regions: The …

Recent empirical studies have indeed confirmed that health disparities exist in coal mining regions of Appalachia compared with other areas of the region or the nation, including …

Investigation of respirable coal mine dust (RCMD) and …

Hypothesis 3 on the relationship between mine size and respirable dust concentration showed higher RCMD concentrations in large mine sizes (only large vs. small mine sizes) in underground and ...

Study on Rheological Properties of Coal Rock Containing …

In view of the dynamic phenomenon that coal and rock are susceptible to external impact disturbance in the mining process, combined with the rheological hypothesis mechanism of coal and gas ...

Study on Rheological Properties of Coal Rock Containing …

Abstract. In view of the dynamic phenomenon that coal and rock are susceptible to external impact disturbance in the mining process, combined with the rheological hypothesis mechanism of coal and gas outburst, the RLSS-II-type triaxial loading creep test system of gas-containing coal and rock developed by ourselves is …

Coal Price and Profitability: Evidence of Coal Mining …

that coal prices can increase the profitability performance of coal mining companies. The increase in coal prices can increase the total profit which will have an impact on the increase in the equity market value of mining companies (Koerner et al., 1995). The profitability of a coal mining company is very elastic, the HBA has

Gastric cancer in coal miners: an hypothesis of coal mine …

An hypothesis is proposed to explain the elevated incidence of gastric cancer among coal miners. Inhaled coal mine dust, especially the larger particles, is cleared from the lung and tracheobronchial tree by mucociliary function, swallowed, and introduced into the stomach. Organic and/or inorganic materials in the dust can undergo intra-gastric ...

A time function-based prediction model of mining …

Mining condition of Mumba coal mine. The mine is located in the northwest of Dhaka 26, the capital of Bangladesh, with a geographical location of 25°31′–25°34′ N and 88°57′–88°59 ...

Deaths associated with pollution from coal power …

Coal-burning power plants are a major source of fine particulate matter (PM 2.5) air pollution.Exposure to PM 2.5 is associated with increased risk of death. To judge …

THE HEALTH IMPACT OF COAL MINING: A REGRESSION …

Coal mining and coal related industries play an important role in the economy of the United States. While total levels of coal production have decreased over the past decade, the reserves left for exploitation are expected to last for the foreseeable future (Kecojevic & Grayson, 2008). Against the backdrop of these potentially long-lasting coal

The economic and social benefit of coal mining: the …

Three main distinguishing features of this research are a) the analysis through the mining boom and bust cycle, b) a focus on small regional areas within one …

Mechanisms of Coal and Gas Outburst Experiments

Coal and gas outbursts in underground mines are the result of dynamic rupture propagation along coal seams, starting from localized instability caused by the sudden release of gas and strain energies. Although physical simulations have facilitated quantitative studies of outbursts, and rupture processes have been investigated both …

Mechanism investigation on coal and gas outburst: An …

Coal and gas outburst is a frequent dynamic disaster during underground coal mining activities. After about 150 years of exploration, the mechanisms of outbursts remain unclear to date. Studies on outburst mechanisms worldwide focused on the physicochemical and mechanical properties of outburst-prone coal, laboratory-scale …

Research on the Influence of the Key Stratum Position on the

In recent years, in order to increase the coal recovery rate, the large mining height fully mechanized top-coal caving mining has been widely used because it has the advantages of both fully mechanized mining method and large mining height mining method. When this mining technology is used to exploit thick coal seam under upper …

This Mine Fire Has Been Burning For Over 50 Years | HISTORY

Coal seam fires are nothing new, but Centralia's is the United States' worst and one of history's most devastating. Before the 1962 fire, Centralia had been a mining center for over a century.

A systematic review of occupational exposure to coal dust …

Follow-up mortality study 1969–2007, underground coal mine workers. Mean follow-up time 20.8 years: 8829/0* Mean 45 at start of follow-up. Mine safety and health administration compliance data from 1982–2002. Gravimetric sampling. Average level by occupational group times duration within each group. Mean coal dust 64.6 mg m –3 year

Gastric cancer in coal miners: An hypothesis of coal mine dust

An hypothesis is proposed to explain the elevated incidence of gastric cancer among coal miners. Inhaled coal mine dust, especially the larger particles, is cleared from the lung and tracheobronchial tree by mucociliary function, swallowed, and introduced into the stomach.

(PDF) Experimental investigation on stress distribution and …

Coal mining has a significant impact on the movement of the overburden, leading to potential safety hazards in the working face. In this paper, a similarity simulation experiment was conducted to ...

Relation analysis of bacterial community in soils of coal …

The networks for coal mine CM1 had higher numbers of edges and graph density and lower average path length than that for the mine CM2. The positive/negative link ratio for coal mines CM1 (P/N = 2.94) was almost two times higher than that observed for the mine CM2 (P/N = 1.68), indicating more positive interactions between bacterial …

THE HEALTH IMPACT OF COAL MINING: A …

Coal mining has a well-established detrimental effect on the health of coal miners who work in the mines or in direct vicinity to the coal mines. However, it is less clear how mining affects the communities living around the mining area. Recent research has …

Investigation on the Fragmentation and Outburst …

Coal is a critical natural resource in the world, which provides large amounts of energy and raw materials for meeting industrial demands in China, America, India, Indonesia, etc. [1,2].With mining depth …

Geochemical characterization of mine overburden strata for …

1. Introduction. Coal has been being used for a long time as an energy source throughout the globe, and about 40% of the total world's electricity production still relies on coal alone (Carbon Brief, 2020).The power generation from coal in the world has almost doubled since the year 2000 to approximately 2000 GW which has been contributed from …

Study of the Dynamic Development Law of Overburden Breakage on Mining

The average thickness of the main mining 15# coal seam is 5.4 m, the average dip angle is 4°, and the average buried depth is 480 m. The daily mining distance of this working face is 6.4 m.

Identification of Ground Deformation Patterns in Coal Mining …

Coal mining inevitably brings some negative impacts, such as surface subsidence, aquifer breakage, and land degradation, to the eco-geological environment in the mining area. Among these impacts, coal mining-induced ground deformation is the most serious and has threatened the geological, ecological, and human settlement …