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The original mission of the USBM was to provide the mining industry with information on blasting materials and techniques that could be used safely in the presence of flammable mine gases and dust. This meant identifying the chemical and physical characteristics that allowed explosives to perform usefully without initiating disastrous fires and explosions. These considerations defined the two main objectives of the USBMs initial research and development - safer blasting materials for underground coal mines, and prevention of underground mine gas and dust explosions.
Although administratively headquartered in Washington, DC, the principal research activities were conducted by the Pittsburgh Mining Experiment Station under Dr. Holmes. According to the Organic Act, the USBM was, among other things, to make diligent investigation of the methods of mining, especially in relation to the safety of miners, the use of explosives, the prevention of accidents. This reflects the origin of what eventually became known as the Pittsburgh Research Center.
In establishing the USBM, Congress undoubtedly was mindful of similar test stations established earlier in England, Germany, Belgium, Austria, and France, whose work had done much to reduce the frequency and severity of coal mine accidents. Recognizing this, the Secretary of the Interior had requested a delegation of foreign experts to visit U.S. mines to make recommendations to improve safety and efficiency. Thus, the groundwork for the birth of the USBM had been laid.
Commercial coal mining commences in the eastern Cape near Molteno Early 1870s The discovery of diamonds in the Kimberley area leads to the expansion of the coal mines in order to meet growing demand for power Late 1880s Commercial coal mining in KwaZulu-Natal and on the Witwatersrand commences, following the discovery of gold on the ...
At the Experimental Mine, work focused on identifying the processes associated with initiation, growth, and eventual extinguishment of mine fires and explosions. There, under conditions similar to those of a working mine, it was learned how weak methane explosions can initiate violent coal dust explosions and how rock dust, water, and other quenching agents can be applied to arrest these explosions. Instruments were developed for the early detection of open flames and incipient fires due to spontaneous combustion.
The importance of coal mining to the culture and economy of Western Pennsylvania means that the history of mining is intimately intertwined with the history of the region itself.
Oct 28, 2020nbsp018332History of coal mining. Coal has been used for centuries for small-scale furnaces. Around 1800 it became the main energy source for the Industrial Revolution, the expanding railway system of countries being a prime user. Britain developed the main techniques of underground mining from the late 18th century onward with further progress being ...
Coal mining is a term that encompasses the various methods used to extract the carbon-containing rock called coal from the ground. Coal tends to exist in seams, which are lateral layers under the earth that may vary in depth from one or two feet to dozens of feet.
In mountainous areas, strip mining may be the first stage of a mines life. Coal is dug from the surface, resulting in ribbons of stripped land stretching around a mountain, and sometimes forming large pits. Strip mining is relatively low cost, requiring perhaps only a backhoe and a dump truck. Profits from strip mining are sometimes used to purchase equipment needed for interior mines.
Unless subject to enforced regulation by government, strip miners tend not to remediate the stripped land afterwards, resulting in long term soil erosion and landscape defacement. Remediation of a strip mine could involve removal of waste materials, restoring the original slope of the land, securing the restored contour from erosion, and replanting or reseeding of vegetation.
Drift mines may be dug horizontally into a mountain after strip mining has used up surface coal. Drift mines may be shallow, and when they are, miners may be unable to stand up and must instead lie flat on flattened vehicles moving inside the tunnel. Drift mines with a height of about 28 are typical in southwest corner of Virginia.
Rather than create drift mines and buying special equipment, mining companies sometimes remove entire mountain tops to get at a coal seam that could have, or should have, been accessed via drift mining. This is the most environmentally destructive type of strip mining.
Deep mines are similar to those for any other mineral deposit found deep enough in the earth that the cost of removing the overburden is prohibitive. Shafts are dug, and veins of coal are excavated and transported to the surface.
All coal miners are potentially subject to lung injury due to breathing coal dust too often, resulting in a dangerous medical condition known as black lung. But some special risks apply when removing underground coal.
Early mining methods led to very unsafe mines which were never adequately represented on maps, or were mapped inaccurately.1 Older mines often had irregularly spaced supporting pillars, making the tunnels more likely to cave in. Modern mines have regular pillars at safe intervals of known thickness, correctly represented on a map. Nevertheless, there is always a risk of cave-ins when mining underground.
History of Coal Mining . The Pittsburgh Coal Seam, especially the high-quality coal from the Connellsville District, had the best coal in the nation for making coke, the principal fuel for iron blast furnaces. The first use of coke in an iron furnace occurred in Fayette County, Pennsylvania, in 1817.
Coal mining, particularly in the case of open-cut mines, requires that large areas of land are temporarily disturbed, and perhaps withdrawn from other productive uses such as agriculture, while the process of coal extraction is under way.The land may, however, be returned to productive use after mining or even while mining in other parts of the area is still in progress Figure 1.2.
Jay Luke is the author of When Coal Was Queen The History of the Queen City - Olyphant, Pennsylvania Tribute Books, 2009. Mining coal has been
Jan 01, 2013nbsp018332Zhungeer Coal Mine, in Inner Mongolia China, is a lignite mine producing some 7 million tonnes of per year, with a work force of 1900. Since 1995, the mine has been using continuous mining technology bucketwheel excavators, conveyor belts and spreaders for the removal of an up to 100 m thick top soil layer.
This is good news for the unions sorely pressed coal miners, who could use the work. How long Murrays reincarnation will last, however, is anyones guess. No amount of corporate planning can negate declining demand and the rise of alternative energy sources. When it comes to career security, those facts now pose more of a threat to the countrys miners than dangers that long defined the industry.
The importance of coal mining to the culture and economy of Western Pennsylvania means that the history of mining is intimately intertwined with the history of the region itself. The resources below discuss mining and labor during the late nineteenth and early twentieth centuries, a crucial period in the history of the industry and local culture.
Then, while the 78 miners still lay entombed in the burning mine, W.A. Tony Boyle, the UMWAs ruthless president, praised the coal companys horrendous safety record even though federal and state safety inspectors had cited it for multiple safety violations that year. When consumer champion Ralph Nader subsequently exposed the fact that Boyle, his family and his cronies were using the unions treasury as their personal piggy bank, it finally pushed Joseph Jock Yablonski, a former miner and long-time union insider, over the edge.
On May 29, 1969, Yablonski kicked off his campaign for the UMWAs presidency with a press conference at Washington, D.C.s Mayflower Hotel with a ten-point program that promised a robust expansion of the unions one-man safety division, paid sick leave, and most radically, a pledge to use the UMWAs vast resourcesit was then the richest labor union in the countryto improve Central Appalachias woefully inadequate schools, expand its sparse social services, and force the coal companies to clean up the regions putrid streams and smoking slag heaps.