Report of InvestigationsU.S. Department of the Interior, Bureau of Mines, 1919 - Mineral industries |
From inside the book
Results 1-5 of 55
Page 7
... bolt , which projected 7 inches from the roof of the wooden mine model entry directly into the contact area of the stopping . In a first trial , the stopping was inflated to 32 inches water gage and left for 1 day . A 1 / 2 - inch cut ...
... bolt , which projected 7 inches from the roof of the wooden mine model entry directly into the contact area of the stopping . In a first trial , the stopping was inflated to 32 inches water gage and left for 1 day . A 1 / 2 - inch cut ...
Page 8
... bolt or some similar projection ( fig . 5 ) . Trials conducted in the Safety Research Coal Mine with stoppings having straps attached showed that inflation was much easier . However , subsequent tests showed that the straps were not ...
... bolt or some similar projection ( fig . 5 ) . Trials conducted in the Safety Research Coal Mine with stoppings having straps attached showed that inflation was much easier . However , subsequent tests showed that the straps were not ...
Page 16
... Bolt ( 3 ) , the incident and reflected waves inside a cavity combine to form a standing wave with pressure maxima spaced at half wavelength . Depending on the direction of travel ( from the unburned to the burned or vice versa ) , the ...
... Bolt ( 3 ) , the incident and reflected waves inside a cavity combine to form a standing wave with pressure maxima spaced at half wavelength . Depending on the direction of travel ( from the unburned to the burned or vice versa ) , the ...
Page 17
... Bolt. PARTICLE , VELOCITY , m sec - l 100 O -100 100 ΟΙ -100 B Crtrt 100г -ISS theory www 1.2 FLAME RADIUS , m FLAME SPEED , m sec - l 50 ISS theory Unburned zone D .6 25 1.2 ∞ .6 FLAME RADIUS , m - FIGURE 11. Velocity histories at 0 ...
... Bolt. PARTICLE , VELOCITY , m sec - l 100 O -100 100 ΟΙ -100 B Crtrt 100г -ISS theory www 1.2 FLAME RADIUS , m FLAME SPEED , m sec - l 50 ISS theory Unburned zone D .6 25 1.2 ∞ .6 FLAME RADIUS , m - FIGURE 11. Velocity histories at 0 ...
Page 18
Following the same arguments as those of Hueter and Bolt ( 3 ) , the follow- ing coefficients of reflectivity and transmissivity can be obtained : and P2 ( 1 + Zu / Z ) + Pu Su ( E - 1 ) ( Su + Cu ) P ̧ ( 1 - Za / Zь ) + Pu Su ( E - 1 ) ...
Following the same arguments as those of Hueter and Bolt ( 3 ) , the follow- ing coefficients of reflectivity and transmissivity can be obtained : and P2 ( 1 + Zu / Z ) + Pu Su ( E - 1 ) ( Su + Cu ) P ̧ ( 1 - Za / Zь ) + Pu Su ( E - 1 ) ...
Common terms and phrases
aluminum bolt BuMines RI Bureau of Mines burning velocity calculated cell chloride coal coalbed combustion composition compressive strength concentration curves degasification density depth of cut determined dicyclopentadiene drilling dump leach effect electrodes Electromotive force eluate energy Engineering Library enthalpy equation experimental explosions FeCl3 flame front flame speed flotation formation gas flow Gibbs free energy H₂SO heat hole ignition ilmenite inches increase inflatable stoppings INTERIOR investigation iron iron chloride kcal kiln kpsi loading Mary Lee MBOB measured metal methane microcline mixture modified sulfur obtained oxide particles pellets percent phase PNCL pressure radius Raney nickel ratio reaction Report resin rock sample shown in figure slimes solder solution specimens steels stope sulfur concretes surface synthetic leach liquor temperature tests thick tion traveltimes tube U.S. Bureau unburned UNIVERSITY OF MICHIGAN Vacutainers values venting WALKER COUNTY zeta potential
Popular passages
Page 3 - An acid plant was installed in 1929 to treat •Underlined numbers in parentheses refer to items in the list of references at the end of this report.
Page 3 - Needless to say, this contractor did not submit a bid. "(10) (Reference to specific trade names is made for identification only and does not imply endorsement by the Bureau of Mines...
Page 10 - API, is pumped to storage. 3Reference to specific makes or models of equipment is made to facilitate understanding and does not imply endorsement by the Bureau of Mines.
Page 11 - Haynes, WP, JJ Elliott, AJ Youngblood, and AJ Forney. Operation of a Sprayed Raney Nickel Tube-wall Reactor for Production of a High-Btu Gas.
Page 34 - Prediction of Laminar Flow and Heat Transfer in Helically Coiled Pipes,
Page 9 - Kissell, FN. CM McCulloch, and CH Elder. The Direct Method of Determining Methane Content of Coalbeds for Ventilation Design.