This paper selects 69 coalMine rescue accidents from 1981 to 2011 in China, focusing on direct unsafe acts and high-frequency unsafe acts that lead to coal mine rescue accidents, and finds that out of all relevant unsafe acts, nineteen categories of high- frequency unsafe acts are statistically significant. This paper selects 69 coal mine …
اقرأ المزيد
The crustal thickness in the Anyuan Coal Mine and its adjacent areas ranges from approximately 32 ∼ 35 km, with an average thickness of 33 km, which is consistent with the crustal thickness results in South China from previous studies using the receiver function method. The average Poisson's ratio of the crustal bulk composition in the study ...
اقرأ المزيد
The potential of coal mine dust to cause disabling pneumoconiosis has long been recognised, but research now suggests that pneumoconiosis is not the only respiratory hazard of coal mining. Over the last 30 years evidence has accumulated that miners also experience an excess of chronic obstructive pulmonary disease (COPD), and this has …
اقرأ المزيد
To study the importance of the adsorption mechanism of methane (CH4) and carbon dioxide (CO2) in coal for coalbed methane development, we aimed to reveal the influence mechanism of adsorption pressure, temperature, gas properties, water content, and other factors on gas molecular adsorption behavior from the molecular level. In this …
اقرأ المزيد
Revealing the microbial community structure and metabolic functions in the underground environment can contribute to a better understanding of the coal mine ecosystem. In this study, we collected …
اقرأ المزيد
The robot for coal mine automatic installation rock bolt can realize the automatic installation of anchor cable equipment in the mine. According to characteristics of robot operation in down hole, especially on its mobile function, anchor device and rack bolt operation device function was analyzed, and the crawler walking mechanism was …
اقرأ المزيد
Coal is one of the main energy sources in China. The country attaches great importance to the development of coal mining industry, and coal production is on the rise. At the same time, mine safety ...
اقرأ المزيد
This study aims to provide further understanding of physiologic and symptomatic changes and radiographic abnormalities due to exposure to silica, asbestos, and coal dusts. Questionnaires and pulmonary function tests were given to 220 silica, 277 asbestos, and 511 coal workers from three different industries in China.
اقرأ المزيد
The present study aimed to investigate the correlation of smoking with cumulative total dust exposure (CTE) and cumulative abnormal rate of pulmonary function in coal‑mine workers. A total of 376 coal‑mine workers were recruited as the observational group, while 179 healthy workers in other industries were selected as the control group. All the …
اقرأ المزيد
Every underground coal mine is designed in such a way as to enable reaching the desired coal output. The method of deposit opening, including the number of shafts and their functions or the number and depth of mining levels, but also the structure of primary excavations, depends on the positioning of the deposit in the mine area.
اقرأ المزيد
Long-term coal mining has created unique microbial communities in deep coal mines. Revealing the microbial community structure and metabolic functions in the underground environment can …
اقرأ المزيد
A time function-based prediction model of mining subsidence: application to the Barapukuria coal mine, Bangla. ... The coalfield stratum belongs to the Carboniferous-Permian, the 1210 working face is located in the south of the mine, and coal seam is horizontal with an average thickness of 5 m. The 1210 working face only laid a …
اقرأ المزيد
Dust generated from the coal production process is known to have various cytotoxic and carcinogenic contents. Prolonged exposure to coal dust can trigger health problems and affect the function of ...
اقرأ المزيد
Introduction. The rapid growth of China's economy for 10 years has brought about an increase in coal demand. After a short period of gradual increase in the number of fatalities in coal mine accidents, with the continuous increase in safety investment, China has achieved a 15-year consecutive reduction in the death rate of one million tons.
اقرأ المزيد
The present study aimed to investigate the correlation of smoking with cumulative total dust exposure (CTE) and cumulative abnormal rate of pulmonary function in coal-mine workers. A total of 376 coal-mine workers were recruited as the observational group, while 179 healthy workers in other industries were selected as the control group.
اقرأ المزيد
The presence of pneumoconiosis and abnormal lung function assessed by spirometry has been found to be associated with working in a small mine (defined as 50 or fewer employees), [14, 20] low seam height (defined as less than 43 in. ), miner age, mining tenure (Fig. 1), coal rank, and region (a surrogate for coal rank, mine size, and seam …
اقرأ المزيد
A total of 71 healthy male coal mine workers, who were machine operators, were recruited from the coal mines located at Tibet (Huatailong Mining sites, altitude about 3990–4400 m) and Tangshan (Kailun Coal Mining site, altitude about 100–120 m). ... For pulmonary function data, average ventilation (VE) at rest/work, average respiratory rate ...
اقرأ المزيد
Introduction. Coal is a main source of energy in the world. Large-scale coal mining has caused serious surface subsidence, ground fractures, and other geological …
اقرأ المزيد
Reports & Multimedia / Explainer. How Coal Works. Published Dec 15, 2017 Updated Dec 18, 2017. Table of Contents. Coal has helped power the United States for …
اقرأ المزيد
Coal Mine is one of the Buildings in Frostpunk. Coal Mine is available after finishing research Coal Mining (Technology), then it can be built from Resources tab. Produce 240 Coal/10h Allows us to build Coal Mines and employ people there who will extract Coal from underground deposits. Change the Shift Length Heater Emergency Shift Foreman Build …
اقرأ المزيد
ARTICLE. Coal is a nonrenewable fossil fuel that is combusted and used to generate electricity. Mining techniques and combustion are both dangerous to miners …
اقرأ المزيد
coal, one of the most important primary fossil fuels, a solid carbon -rich material that is usually brown or black and most often occurs in stratified sedimentary deposits. Location of the most-important coal …
اقرأ المزيد
In the process of green and smart mine construction under the context of carbon neutrality, China's coal safety situation has been continuously improved in recent years. In order to recognize the development of coal production in China and prepare for future monitoring and prevention of safety incidents, this study mainly elaborated on the basic situation of …
اقرأ المزيد
Coal mining may lead to ground subsidence in a long term and is widely distributed, which can cause environmental damage and other disasters. Predicting …
اقرأ المزيد
Despite their anthropogenic origin, the substrate of coal mine spol heaps does not contain high concentrations of heavy metals and other dioxins compared to other post-industrial sites (e.g. lead ...
اقرأ المزيد
This study used the triangular fuzzy number function to analyze the expert score on the subsystems and the first-level indexes, and then calculated their weights. ... The coal mine safety risk ...
اقرأ المزيد
With the increase of mining depth in Chinese coal mines, the entry floor heave becomes one of the major engineering problems. This paper has studied the stress and displacement distribution around an entry in Buertai coal mine, China. The mechanism of floor heave is analyzed using the method of complex variable function. The …
اقرأ المزيد
There is archaeological evidence that coal was burned in funeral pyres during the Bronze Age, 3,000 to 4,000 years ago, in Wales. Aristotle mentions coal ("combustible …
اقرأ المزيد
Section: Coal mining remains a sizable industry, with millions of working and retired coal miners worldwide. This article provides an update on recent advances in the …
اقرأ المزيد
The actual measurement of coal dust particle size is subject to a certain function of the distribution of polydisperse particle system, in which large particles of coal dust has large fluctuations in the signal, the project needs to simultaneously measure the concentration of coal dust and the average particle size at the same time, containing ...
اقرأ المزيد