Miners' Circular, Utgaver 1-40U.S. Government Printing Office, 1913 |
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Side 3
... hole .__ . Regulating length of drill holes_ Poorly balanced shots___ A well - balanced shot .. Holes drilled into the solid . Stuck cartridges_____ Tampers and needles_ . Tamping Limit charge_ . Shale - dust cloud_ Water cartridge_ ...
... hole .__ . Regulating length of drill holes_ Poorly balanced shots___ A well - balanced shot .. Holes drilled into the solid . Stuck cartridges_____ Tampers and needles_ . Tamping Limit charge_ . Shale - dust cloud_ Water cartridge_ ...
Side 4
... hole ---- Firing a double charge of permissible explosive in the same hole___ Making charges --- . Size of cartridges- Placing the detonator__ Detonator should fit tightly in cartridge . Detonation___ Imperfect detonation by using laced ...
... hole ---- Firing a double charge of permissible explosive in the same hole___ Making charges --- . Size of cartridges- Placing the detonator__ Detonator should fit tightly in cartridge . Detonation___ Imperfect detonation by using laced ...
Side 8
... holes in screens Diameter of round holes in screens through which grains on which pass . grains collect . CCC inch ... hole to expend their explosive energy on the atmosphere of the mine , thus causing a windy shot . All black powder ...
... holes in screens Diameter of round holes in screens through which grains on which pass . grains collect . CCC inch ... hole to expend their explosive energy on the atmosphere of the mine , thus causing a windy shot . All black powder ...
Side 9
... hole , and loose powder is put into this cavity with a tin scoop fastened on the end of a broom handle . This powder is apt to run into any cracks or crevices in the coal , and all of it is not confined to the drill hole , as is powder ...
... hole , and loose powder is put into this cavity with a tin scoop fastened on the end of a broom handle . This powder is apt to run into any cracks or crevices in the coal , and all of it is not confined to the drill hole , as is powder ...
Side 10
... hole , the solid particles of the powder are suddenly transformed into highly heated gases , which , by reason of their tendency to expand , exert pressure on the sides of the drill hole and do useful work in rending the coal or rock ...
... hole , the solid particles of the powder are suddenly transformed into highly heated gases , which , by reason of their tendency to expand , exert pressure on the sides of the drill hole and do useful work in rending the coal or rock ...
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accidents acetylene afterdamp amount analysis aspirator bulb atmosphere bandage battery black damp blasting blood bottle brattice BULLETIN Bureau of Mines burette burning canaries carbide carbide lamp carbon dioxide carbon monoxide carbon monoxide detector cars cartridge cause cent CIRCULAR Clarence Hall coal dust coal mines color combustion concentrations cubic dangerous detecting determination detonator device drill hole dynamite electric equipment explosive mixture falls feet figs FIGURE filament fire fire damp first-aid flame safety lamp fuse G. S. Rice gases gauze glass H. H. Clark heat hoolamite hydrogen sulphide ignited inches indicator light meter methane detector method miners minutes operations oxygen breathing apparatus percent percentage permissible explosives pipette poisoning powder precautions present pressure procedure props removed rescue station rheostat roof rubber sample container seal shot firer solution stopcock sulphur dioxide TECHNICAL PAPER temperature timber tion tube underground usually valve vapor ventilation volume wire
Populære avsnitt
Side 8 - Resuscitation, composed of authorized representatives of The American Medical Association, The National Electric Light Association and The American Institute of Electrical Engineers.
Side 21 - It is about 4£ inches long and is lined with mucous membrane, which is continuous with that of the nose and mouth.
Side 23 - The patient must be watched, and, if natural breathing stops, artificial respiration should be resumed at once. 11. In carrying out resuscitation, it may be necessary to change the operator. This change must be made without losing the rhythm of respiration. By this procedure, no confusion results at the time of change of operator, and a regular rhythm is kept up.
Side 23 - Not infrequently the patient, after a temporary recovery of respiration, stops breathing again. The patient must be watched, and, if natural breathing stops, artificial respiration should be resumed at once.
Side 21 - Mining and treatment of feldspar and kaolin in the southern Appalachian region, by AS Watts. 1913. 170 pp., 16 pis., 12 figs. BULLETIN 56.
Side 62 - When the methane content of air in face operations exceeds 1 percent at any point not less than 12 inches from the roof, face, or rib, as determined by a permissible methane detector, a permissible flame safety lamp, or chemical analysis, this condition shall be corrected by improving the ventilation promptly.
Side 21 - BULLETIN 17. A primer on explosives for coal miners, by CE Munroe and Clarence Hall. 61 pp., 10 pis., 12 figs. Reprint of United States Geological Survey Bulletin 423. BULLETIN 20. The explosibility of coal dust, by GS Rice, with chapters by JCW Frazier, Axel Larsen, Frank Haas, and Carl Scholz.
Side 9 - ... 6. Continue artificial respiration without interruption until natural breathing is restored, if necessary, four hours or longer, or until a physician declares the patient is dead. 7. As soon as this artificial respiration has been started and while it is being continued, an assistant should loosen any tight clothing about the patient's neck, chest or waist.
Side 14 - BULLETIN 15. Investigations of explosives used in coal mines, by Clarence Hall, WO Snelling, and SP Howell, with a chapter on the natural gas used at Pittsburgh, by GA Burrell, and an introduction by CE Munroe.
Side 60 - BULLETIN 44. First national mine-safety demonstration, Pittsburgh, Pa., October 30 and 31, 1911, by HM Wilson and AH Fay; with a chapter on the explosion at the experimental mine, by GS Rice.