radon underground mine Solutions Just Right For You

This paper presents an extensive literature review on the various sources of radon such as ore body backfill mill tailings broken ore and mine water in underground uranium mines This review also comprehensively investigates the influence of intrinsic factors such as ore grade 226Ra content water content porosity and surface area of the materials and the extrinsic The Free Enterprise Radon Health Mine was originally used for silver and lead mining until 1949 when the presence of radioactivity was discovered Then a miracle happened In 1951 a woman from L A visited the site with her husband and noticed her bursitis disappeared after several visits to mine

Proposed Standard for Radon

40 CFR Part 61 EPA 520/1-85-010 National Emission Standards for Hazardous Air Pollutants DRAFT BACKGROUND INFORMATION DOCUMENT PROPOSED STANDARD FOR RADON-222 EMISSIONS TO AIR FROM UNDERGROUND URANIUM MINES February 14 1985 Document No (PEI 3642-12) U S Environmental Protection Agency Office of Radiation

40 CFR Part 61 EPA 520/1-85-010 National Emission Standards for Hazardous Air Pollutants DRAFT BACKGROUND INFORMATION DOCUMENT PROPOSED STANDARD FOR RADON-222 EMISSIONS TO AIR FROM UNDERGROUND URANIUM MINES February 14 1985 Document No (PEI 3642-12) U S Environmental Protection Agency Office of Radiation

Efficient ventilation of underground mines consists in having such complete control of air currents that there is always supplied at places where men work sufficient moving air to allow working at maximum capacity without injury to health and in case of underground fire or of surface fire in the vicinity of mine openings underground air currents may be quickly reversed if desired or

Read Radon emanation from backfilled mill tailings in underground uranium mine Journal of Environmental Radioactivity on DeepDyve the largest online rental service for scholarly research with thousands of academic publications available at your fingertips

This paper presents an extensive literature review on the various sources of radon such as ore body backfill mill tailings broken ore and mine water in underground uranium mines This review also comprehensively investigates the influence of intrinsic factors such as ore grade 226Ra content water content porosity and surface area of the materials and the extrinsic

250 miners carry out maintenance at more than 40 small and frequently changing underground construction sites throughout the year Miners are protected against high radon exposure by radiation protection measures such as ventilations stoppings made of wood foil and expanding foam and staff rotations However some of them still show high annual exposure levels for

Radon progeny in underground mines: a recommended

14-4-2020The National Institute for Occupational Safety and Health (NIOSH) recommends that worker exposure to radon progeny in underground mines be controlled by compliance with the recommended standard which is designed to protect the health of underground miners over a working lifetime of 30 years Mine

14-4-2020The National Institute for Occupational Safety and Health (NIOSH) recommends that worker exposure to radon progeny in underground mines be controlled by compliance with the recommended standard which is designed to protect the health of underground miners over a working lifetime of 30 years Mine

emanation and the growth of radon daughters within the atmospheres of subsurface openings Methods of measurement will be discussed while the final sect ion is devoted to pragmatic guidelines to be followed in designing a ventilation system for a mine with high radon

|Environmental Health Engineering 5 Radon Exposures in a Granite Quarry RESULTS Literature Review Results Quarry Types and Dimensions: In general mines are typically defined as either surface or sub-surface (underground) mines as these are the most common excavation methods

Underground mine cooling Underground Mining - Ventilation and cooling systems For example radon which is often present in uranium mines is poisonous if inhaled We can help you find the right ventilation system that will keep your personnel safe and your equipment in optimal working condition

Necessity to control underground mine air radon level arises during building and operating mines as well as auto and railway tunnels including those for metros Calculation of underground mine air radon level can be fulfilled for estimation of potential radon danger of area for underground structure building In this work the new mathematical model of radon accumulation in underground

engineering approach to reducing the concentration of radon progeny in mines) is accomplished by the exchange of mine air with air from the outside environment Obviously this approach is not a viable option for the total elimination of radon progeny in underground mines because the outside air is also contaminated with radon progeny

The results of radon measurements for three underground lignite mines are given in Table 1 The given value for a particular mine is the average of the radon concentrations obtained from 50 detectors installed in a mine The arithmetic mean values were found to vary between 172 and 340 Bq m −3 while the maximum value was 587 16 Bq m −3

Indoors the concentration of radon can be higher as buildings have the effect of trapping radon Radon levels are highly variable depending on the type of house and the flow of air through the home There are places where radon levels can be very high: in some caves for example or in a poorly ventilated underground mine

Sources of Radon and its Measurement Techniques in

ABSTRACT Purpose This study aims to identify the potential sources of radon exhalation and its measurement in underground uranium mines to control the radiation levels within safe limits and protect miners from radiation hazards Methods An extensive literature review on radon exhalation in underground uranium mines from various sources such as uranium ore backfill tailings and mine

ABSTRACT Purpose This study aims to identify the potential sources of radon exhalation and its measurement in underground uranium mines to control the radiation levels within safe limits and protect miners from radiation hazards Methods An extensive literature review on radon exhalation in underground uranium mines from various sources such as uranium ore backfill tailings and mine

The results of radon measurements for three underground lignite mines are given in Table 1 The given value for a particular mine is the average of the radon concentrations obtained from 50 detectors installed in a mine The arithmetic mean values were found to vary between 172 and 340 Bq m −3 while the maximum value was 587 16 Bq m −3

ing underground construction sites throughout the year The radon potential in the Ore Mountains (Erzgebirge) and the Vogtland ishigh Radon activity concentration peaks with up to 1 MBq m−3 can occur Therefore extensive radiation pro-tection measures are necessary for miners The most important mea-sures are mine ventilation with

RADON RELEASE FROM UNDERGROUND STRATA TO THE SURFACE AND UNIAXIAL COMPRESSIVE TEST OF ROCK SAMPLES Wei ZHANG 1 2 3 4)* Dongsheng ZHANG 5) Lixin WU 3) Juanjuan LI 1) and Jixin CHENG 5) 1) IoT Perception Mine Research Center National and Local Joint Engineering Laboratory of Internet Application Technology on

Abstract This paper summarized the separation process of radon based on its geophysical-chemical properties Taking into account the geological conditions of mining the mathematical model of radon migration in underground multilayer strata (UMS) was established to investigate the distribution law of radon concentration in UMS

250 miners carry out maintenance at more than 40 small and frequently changing underground construction sites throughout the year Miners are protected against high radon exposure by radiation protection measures such as ventilations stoppings made of wood foil and expanding foam and staff rotations However some of them still show high annual exposure levels for

Radionuclides in mineral coal and related rocks are of great concern to the human health among them the radon gas as it has been considered the second largest cause of lung cancer by the World Health Organization (WHO) This paper describes a field and laboratorial study focusing this noble gas in the Amando Simes PI-08 coal mine Figueira city Paran State Brazil The

The CNSC regulates radon in Canada's nuclear facilities to protect workers members of the public and the environment Long-term exposure to elevated levels of radon increases the risk of developing lung cancer which is why the CNSC ensures that the air quality in a uranium mine is tightly controlled with good ventilation

engineering approach to reducing the concentration of radon progeny in mines) is accomplished by the exchange of mine air with air from the outside environment Obviously this approach is not a viable option for the total elimination of radon progeny in underground mines because the outside air is also contaminated with radon progeny

Information and resources about active underground mines You may need a PDF reader to view some of the files on this page See EPA's About PDF page to learn more Identifying Opportunities for Methane Recovery at U S Coal Mines: Profiles of Selected Gassy Underground Coal Mines 2002-2016 (PDF) (73 pp 2 July 2019) Coal Mine Methane

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