File:ExperimentalMinePA.jpg
Summary
Dedication of the <a href="https://en.wikipedia.org/wiki/Experimental_Mine,_U.S._Bureau_of_Mines" class="extiw" title="en:Experimental Mine, U.S. Bureau of Mines">Experimental Mine</a>, which opened in 1910, <a href="https://en.wikipedia.org/wiki/Bruceton,_Pennsylvania" class="extiw" title="en:Bruceton, Pennsylvania">Bruceton, Pennsylvania</a>. According to the <a href="https://en.wikipedia.org/wiki/Centers_for_Disease_Control_and_Prevention" class="extiw" title="en:Centers for Disease Control and Prevention">CDC</a>/<a href="https://en.wikipedia.org/wiki/National_Institute_for_Occupational_Safety_and_Health" class="extiw" title="en:National Institute for Occupational Safety and Health">NIOSH</a> website: "In 1910, the newly created <a href="https://en.wikipedia.org/wiki/United_States_Bureau_of_Mines" class="extiw" title="en:United States Bureau of Mines">U.S. Bureau of Mines</a> leased a 38-acre tract of land from the <a href="https://en.wikipedia.org/wiki/Pittsburgh_Coal_Company" class="extiw" title="en:Pittsburgh Coal Company">Pittsburgh Coal Co.</a> in <a href="https://en.wikipedia.org/wiki/Bruceton,_Pennsylvania" class="extiw" title="en:Bruceton, Pennsylvania">Bruceton</a>, about 13 miles south of <a href="https://en.wikipedia.org/wiki/Pittsburgh" class="extiw" title="en:Pittsburgh">Pittsburgh</a>. Here, a new mine, known as the Experimental Mine, was opened. One of the early experiments in the Experimental Mine demonstrated that <a href="https://en.wikipedia.org/wiki/Coal_dust" class="extiw" title="en:Coal dust">coal dust</a> by itself was capable of propagating an explosion even in the absence of any <a href="https://en.wikipedia.org/wiki/Methane" class="extiw" title="en:Methane">methane gas</a>. This demonstration was contrary to the old belief widely held at the time that coal dust could not explode without gas. This view had led to the very dangerous and widespread practice of using loose coal dust in mines to pack explosives in boreholes, which had cost many thousands of lives. These early experiments clearly proved that such a practice was too hazardous to continue."<a rel="nofollow" class="external autonumber" href="http://www.cdc.gov/niosh/mining/content/history.html">[1]</a>
Licensing
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:25, 13 January 2017 | | 900 × 590 (128 KB) | 127.0.0.1 (talk) | Dedication of the <a href="https://en.wikipedia.org/wiki/Experimental_Mine,_U.S._Bureau_of_Mines" class="extiw" title="en:Experimental Mine, U.S. Bureau of Mines">Experimental Mine</a>, which opened in 1910, <a href="https://en.wikipedia.org/wiki/Bruceton,_Pennsylvania" class="extiw" title="en:Bruceton, Pennsylvania">Bruceton, Pennsylvania</a>. According to the <a href="https://en.wikipedia.org/wiki/Centers_for_Disease_Control_and_Prevention" class="extiw" title="en:Centers for Disease Control and Prevention">CDC</a>/<a href="https://en.wikipedia.org/wiki/National_Institute_for_Occupational_Safety_and_Health" class="extiw" title="en:National Institute for Occupational Safety and Health">NIOSH</a> website: "In 1910, the newly created <a href="https://en.wikipedia.org/wiki/United_States_Bureau_of_Mines" class="extiw" title="en:United States Bureau of Mines">U.S. Bureau of Mines</a> leased a 38-acre tract of land from the <a href="https://en.wikipedia.org/wiki/Pittsburgh_Coal_Company" class="extiw" title="en:Pittsburgh Coal Company">Pittsburgh Coal Co.</a> in <a href="https://en.wikipedia.org/wiki/Bruceton,_Pennsylvania" class="extiw" title="en:Bruceton, Pennsylvania">Bruceton</a>, about 13 miles south of <a href="https://en.wikipedia.org/wiki/Pittsburgh" class="extiw" title="en:Pittsburgh">Pittsburgh</a>. Here, a new mine, known as the Experimental Mine, was opened. One of the early experiments in the Experimental Mine demonstrated that <a href="https://en.wikipedia.org/wiki/Coal_dust" class="extiw" title="en:Coal dust">coal dust</a> by itself was capable of propagating an explosion even in the absence of any <a href="https://en.wikipedia.org/wiki/Methane" class="extiw" title="en:Methane">methane gas</a>. This demonstration was contrary to the old belief widely held at the time that coal dust could not explode without gas. This view had led to the very dangerous and widespread practice of using loose coal dust in mines to pack explosives in boreholes, which had cost many thousands of lives. These early experiments clearly proved that such a practice was too hazardous to continue."<a rel="nofollow" class="external autonumber" href="http://www.cdc.gov/niosh/mining/content/history.html">[1]</a> |
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