Ebook- the Effects of Mining on Human Health.Pdf
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The Effects of Mining on Human Health Different Sources of Dust Particles The collapse of underground mines, perhaps due to Dust particles can be produced through a range of heavy rainfall or poor construction, are some of the activities involved in the extraction of different rock and most common causes of underground mining accidents. mineral products on surface and underground mining Air pollution is also a major cause, with high levels of sites. Activities such as excavation, blasting and drilling of flammable methane gas and coal dust being the cause of rocks release different forms of dust particles, including: some of the most serious mining accidents in history. • Dust containing crystalline silica Underground air pollution can also have a serious effect • Coal dust on human health, the effects of which can sometimes take decades to be detected. There are now more high- • Asbestos tech methods of revealing the different forms of air • Metals, including lead, mercury, and uranium pollution present and then to substitute them for another particles substance, or even remove them completely. It is still important that workers are all aware of the different forms of air pollution in the mine they’re working in from the time that work begins. Forms of Underground Air Pollution The main causes of air pollution on mining sites are particulate matter (dust particles) and gases including radon (RN), methane (CH4) and carbon monoxide (CO). Underground mining sites that are not well ventilated are highly risky and respiratory problems such as black lung disease and silicosis are two of the most severe results of long-term dust exposure. Lung cancer and tuberculosis could even be a result of long-term exposure to dust particles or a toxic gas, such as radon. Request a Demo 2 The form and quantity of particles released, depends on the Effects of Dust Particles on Human Health geology of the rock involved and the different activities that are included in the mining process. Over time, the lungs could be badly affected by regular exposure to mining dust and hazardous gases. If too much dust is inhaled, the lungs could swell up, leading to breathing The effects that dust can have on human health, depend on: difficulties. Other effects include: • The size of dust particles. • Coughing • The structure of dust particles and their effect on the • Sore throat body. • Fever • The intensity of dust particles, compared to the size of • Chest pain the workers breathing zone. • Nausea • How often the dust is inhaled over a period of time. • Tiredness Black lung disease and silicosis are Smaller respirable particles may be invisible to the naked eye two of the most serious respiratory and able to reach deep down into the lungs. Lung scarring, problems caused by dust exposure and fibrosis are some of the effects of respirable quartz and can even be the cause of (crystalline silica) dust. Other respirable particles can even be diseases such as heart disease and the cause of cancer. Black lung disease and silicosis are two lung cancer. of the most dangerous respiratory problems, but luckily new methods of protection and stricter laws on the intensity of dust particles are making them less common. Request a Demo 3 Black Lung Disease Symptoms include: Black lung disease, or coal workers’ pneumoconiosis, is • Shortness of breath the result of inhaling too much coal dust, a highly explosive • Strong coughing powdered form of coal particles. Coal dust accumulates in the lungs until it can’t be removed, giving patients similar • Fever symptoms to the long term effects of tobacco smoking. This • Night Sweats can lead to inflammation, fibrosis and in some cases necrosis (premature death of cells in living tissue). Early stages of • Weight loss black lung disease could have no symptoms. Later symptoms include: • Respiratory failure • Chest pains • Chronic coughing • Shortness of breath Since these symptoms may not be noticed for 15 to 20 years, it is most important to make sure that workers are not at risk • Pain breathing from inhaling silica or coal dust. Suffering from black lung • Increase in mucus (sometimes turning black) disease and silicosis can increase the risk of other miner’s health problems occurring, such as: • Coughing up blood • Chronic bronchitis • Heart disease Modern safeguards such as respirators and ventilation systems are effective methods of prevention, which are also • Lung cancer commonly used for the prevention of silicosis. • Pneumonia Silicosis • Asthma Silica dust is frequently released from soil and rocks being • Sclerosis grinded or broken up on mining sites. These small particles of dust can also be inhaled and trapped in the lungs. Silicosis is Other dusts, containing heavy metals can also have serious also a serious lung disease that could be fatal. effects. Request a Demo 4 Mercury Poisoning Different Range of Mine Gases The effects of inhaling mercury vapor Mine gases, also called ‘damps’ (Dampf is the can be serious or even fatal. This heavy German word for vapor) refers to the range of metal is found in about 25 organic mineral gases involved in mining operations. These compounds present in different mines. gases include: Mercury (Hg) can be inhaled, swallowed, or even absorbed through the skin. Results of Firedamp: highly flammable and explosive gas, mercury poisoning include: usually methane (CH₄) Whitedamp or carbon monoxide (CO): Formed in coal mines, mainly by the oxidation of coal. • Mouth ulcers Blackdamp: Any atmosphere where a fire lamp • Insomnia will not burn due to excess carbon dioxide • Nausea (CO₂), nitrogen (N₂) and/or low oxygen. • Abdominal pain Stink damp or hydrogen sulfide (H₂S): Given this name because of its’ distinctive smell of rotten • Headaches eggs • Cardiac weakness Afterdamp: Mixture of all gases left in a mine after an explosion or fire. If workers are exposed to a high level for several years, their The US Mine Safety and Health Administration insists that kidneys may be affected, potentially even leading to kidney gas detection equipment is used in all mines to detect these failure. common gases. Calculations should also be used to measure the % Lower Explosive Limit, which these hazardous gases hazardous gases can also be the cause of life-threatening must be under to prevent the risk of explosion. medical problems like lung cancer, while explosive, highly flammable gases such as methane, have been the cause of some of the most serious disasters in mining history. Request a Demo 5 Effects of Unsafe Levels of Mine Gases Ventilation fans are also used to dilute gases under their explosive level. It is a legal requirement that mining sites are Gas detectors are a crucial form of equipment to use in monitored for a dangerous level of methane concentration underground mining sites and methane is one of the most in the air. Levels must be under the important to measure. explosive range of 5%. According to the National Institute for Occupational Health and Safety (NIOSH), targets Disastrous Effects of Unsafe Methane Levels should be set to reach below 1%. In 2015, it was calculated that Methane Fire and explosion are two of the main (CH₄) makes up approximately 10% of all risks of gas exposure but, human health greenhouse gases in the US. Over a 100- can also be affected. year period, its’ impact on trapping radiation has been 25 times greater than CO₂. Along with coal dust, it is the most common cause of coal mine Effects of Radon on Human Health explosions and is more readily ignitable. These explosions are Radon is an odorless, radioactive gas involved in uranium, usually caused by former methane explosions that force the coal, silver, and other forms of underground mining. The dust up into the air. When the dust is ignited, flames are more concentration of radon in mines varies a lot, but it is especially likely to spread over a long distance. common when uranium, found in rocks such as granite and limestone, is broken down to produce radium sediments. Sediments can then decay into this radioactive gas. If A high methane level lifting explosive coal dust into the air, the gas is allowed to build up it begins to decay, forming resulted in some of the largest coal mine accidents in history. solid particles which can then enter the lungs, unable to Including: escape. This is the main source of radiation in most forms of 1906: 1,099 killed in the Courrières mine disaster in North underground mining and lung cancer can be a serious result. France The results of exposure to many of these gases and dust 1913: 439 killed in a mine disaster at Senghenydd in South particles, indicates the importance of protection for mining Wales. workers. Luckily, many of these medical problems can be prevented through better ventilation systems, personal 1942: 1549 killed in a mine in Benxihu Colliery, China. Request a Demo 6 protective equipment (PPE), or even the elimination of these Alternative Safer Substance particles altogether. If there is a safer alternative for any of the dust particles or gases used, this is also recommended. For example, scientists Removal or Alteration of Unsafe Substances in Northwestern University discovered cornstarch as being an environmentally friendly alternative to the highly poisonous The most effective way of preventing miner’s health problems cyanide. This was used by almost every gold mining site to caused by substance exposure is to remove them from a separate gold from other raw materials. mining site. Changing these particles for a safer equivalent is another effective method, but workers may need to receive the proper mine safety training to notice any of the effects “The elimination of cyanide from the gold industry is of the of exposure, and provided with efficient Personal Protective utmost importance environmentally.