3 edition of Methods of Rock-Dusting American Coal Mines. found in the catalog.
Methods of Rock-Dusting American Coal Mines.
United States. Bureau of Mines.
|Series||Report of investigations (United States. Bureau of Mines) -- 3465|
This inerting technique, referred to as rock dusting, is required by law in U. In addition, transparent window 12 is preferably a 0. What are the significant findings? Government officials conferred with Mine Foreman Howard Feathers as to the expected damage to airway mechanisms, and the crew hurriedly attempted to make temporary repairs that would circulate air into the affected area. Fifty-three men had died on the working sections, and three others along the main haulageway soon suffocated in the noxious fumes created by the blast. Christopher and his managers had no way of knowing the exact location of the group.
Code of Federal Regulations see Table In practice, the dust sample is placed in a vial along with 8 to 12 mesh molecular-sieves and shaken for 2 to 3 minutes. They retraced their steps to the surface along with the crew of another section. Man and K. Informed that they would attempt an escape, the men underground ceased work on their barricade, gathered nails, brattice cloth, axes, picks, first-aid kit, and saw and hurriedly traveled along a return airway.
Therefore, it is most likely that only the VM of the coal or even only a portion of the VM can be vaporized and participated in mine explosion. In current rock dust surveillance practices, wet samples are seldom taken and when they are, chemical analysis is much longer and more involved than if the samples were dry. The throng of employee families and the curious soon exceeded two thousand, with the majority gathered on the hill directly over the mine portal. For example, in Kentucky when the abuses of strip mining were the greatest along with Virginiastate law set limits to the size of the cut that could be made into the side of the mountain, thus in theory limiting the amount of waste, rock or spoil that would be produced by the mine and thus how much of the waste would find its way onto the slope of the mountain, i. The magnitude of the financial investment and the opportunity to achieve the highest levels of profitability increases the pressure on everyone employed at the mine. Although he had not received word that the men underground had escaped, Christopher determined that enough time had elapsed for the group to do so, and because it was believed imperative to channel air into 1 Right, he ordered the ventilation system restarted.
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This compares with the national prevalence rate for CWP among active underground miners in the U. It is a chronic, fibrotic, and irreversible disease that robs miners of their breath and life. The causes of this disaster are relevant to most of the topics addressed in this blog. All Department of Mines reports are hereafter cited by year.
Other concepts have been investigated for mitigating coal dust explosions. Keith Trent and Daniel Snodgrass both said they had no degrees, only on-the-job training. Thus, even when a worthwhile requirement was passed into law over the opposition of the industry, the law went largely or, in many cases, completely unenforced.
Circuit 30 draws about 15 ma and with a suitable power pack shown, and provides about 4 hours of continuous service. Contour mining caused almost unimaginable damage to Appalachia in the s and 70s and in regions such as northern West Virginia and southeast Ohio, produced chronic acid mine drainage.
An arrangement of water sprays on the shearer is depicted in Figure F More importantly, the men underground proceeded under the false assumption that the ventilation fan would remain inoperative until contact was reestablished.
The second condition provides sufficient thermal energy to ignite the coal dust and to sustain the chain explosion process. The procedure for performing this adjustment is contained in the manufacturers' data sheets.
Obviously, the long-term effects of breathing coal dust would later produce respiratory diseases. Three died as a result of carbon monoxide poisoning, with contributory injuries caused by the blast.
The vastness of U. In addition to proper selection of equipment to match the geologic conditions, ventilation planning is critical as the high production demands large quantities of air in the working faces to keep dust and gas concentrations under mandated levels.
The main functions of rock dust in controlling mine explosions i. Coal was king, at least for a time.
O'Neill and a party of officials entered the mine while the underground group was in transit, and Frank Christopher answered when the assistant foreman telephoned to report that the workers had arrived safely.
The moisture content of the dust mixtures was also found to influence the reflectivity mesurements as was also discussed above.
Detecting the odor of burning rubber and electrical insulation, Hakin walked a few feet toward the front of the trip where he discovered the haulage locomotive on fire.
To demonstrate the heat sink effect of rock dusting, the entry is dusted with limestone powder at 0. Knowing that every pass taken on the longwall would bring it that much closer to finishing before it had a place to move to did not deter the efforts of the longwall crews.REMEMBER - The chance of propagation and risk of widespread explosion disasters in bituminous coal mines can be nearly eliminated when rock dust is applied liberally and maintained properly.
However, unless rock dusting is appropriately and properly maintained, it will almost surely fail in an emergency. Stone dusting or rock dusting to prevent coal-dust explosions, as practiced in Great Britain and France, (Washington, Govt.
print. off., ), by George Samuel Rice (page images at HathiTrust) Peak methane concentrations during coal mining: an analysis / ([Washington]: U.S. Bureau of Mines, ), by Fred N. Kissell and United States.
In academia, he has been a professor, a chair, and a dean, and has published technical articles, reports, and book chapters, including 62 articles in peer-reviewed journals.
His publications largely focus on mine health and safety, including on underground coal mines, and mine management applications. Dr. Rock dusting by hand method /, by D. Harrington, C. W. Owings, and United States. Bureau of Mines (page images at HathiTrust) State regulations governing explosion-proof type electric motors in coal mines /, by L.
C. Ilsley and United States. Bureau of Mines (page images at HathiTrust). Your Rock Dusting Solution For Mitigating Coal Dust Explosions Huber Carbonates, LLC understands the importance of underground mine safety.
Our broad line of high performing calcium carbonate MineBrite™rock dust products are mined underground in the U.S. from locations in Quincy, Illinois and Marble Hill, Georgia. We also. A staggering coal miners were killed in the Hanna Basin mines while in the process of mining the coal.
The Hanna Basin mines produced coal for years. Coal production started at Carbon in and ended in Carbon inwhich amounted to 35 years of continuous production.