Information Circular1943 - Mines and mineral resources |
Common terms and phrases
amorphous anthracite assignor average barite bituminous coal blasting caps borehole brick brucite Bureau of Mines burning calcined carbon caused caustic-calcined circuit Claims allowed coal mines coke combustion commercial consumption containing crew Crucible deposits determined detonators developed device diatomite dolomite drilling dust electrical engineer equipment explosions feet fire fiscal flake flame safety lamps fluorescent fresh-air base fuel furnace gases gasoline Geol geological Geophys geophysical graphite gravity hazards heat ignition increase indicate industry INFORMATION CIRCULAR insulation langbeinite light logging magnesia magnesium magnetic manufacture material means mechanical method mica mineral wool minerals natural gas occurred Okla operation oxide oxygen breathing apparatus paint percent periclase petroleum pipe placed present production properties quantities radioactive rocks safety lamps samples seismic Short tons silicate storage structure sulfate surface Survey talc temperature tests tube Tulsa U. S. Patent underground United ventilation vermiculite wires
Popular passages
Page 6 - The early completion of the general magnetic survey of the globe, as undertaken by the Department of Terrestrial Magnetism of the Carnegie Institution of Washington and cooperating countries, will afford the necessary data for the investigation of some of the so-called "greater problems of the earth's magnetism.
Page 36 - Electric drills or other electrically operated rotating tools intended to be held in the hands and post drills shall have the electric switch constructed so as to break the circuit when the hand releases the switch or shall be equipped with friction or safety clutches.
Page 10 - Smoking, carrying smokers' articles, or open flame shall be prohibited in or near any magazine. SEC. 2. Cardox charging station, (a) A Cardox charging station shall: 1. Be in a fireproof structure on the surface or isolated from other operations in the same building by a substantial fireproof partition. 2. Be provided with at least two methods of relieving; excess pressure in the storage tank. If one of these methods is a valve, the valve shall be tested monthly.
Page 20 - Auxiliary or blower fans with tubing may be used to ventilate shaft and slope-sinking operations and their underground connections, the faces of rock tunnels being driven between two coal beds or through faults and wants, If they are powered with permissible driving units, operated continuously, inspected at least twice during each shift, and so placed that recirculation of air is not possible. (See article V, section 10a.) c.
Page 30 - Shelter holes made after the effective date of this section shall be at least 5 feet in depth, not more than 4 feet in width, and 6 feet in height or as high as the traveling space, if the traveling space is less than 6 feet high. Room necks and crosscuts may be used as shelter holes even though their width exceeds 4 feet.
Page 46 - Each mine shall have a check-in and check-out system that will provide positive identification upon the person of every individual underground. An accurate record of the men in the mine, which shall consist of a written record...
Page 35 - ... to 0.44 percent. All samples, collected on both inspections, contained some methane. It was recommended that the mine be classed as a gassy mine and be operated as such, on both inspections. Moreover, on page 23 of the reinspection report, the following recommendation is found : "When electrical equipment is used in face regions, tests for methane should be made at least every 30 minutes by a certified official or other competent person.
Page 21 - NY Goodyear Tire & Rubber Co., 1144 E. Market St., Akron 16, Ohio.
Page 18 - In lieu of requirements for the location of the fan and the pressure-relief or explosion doors, the fan may be directly in front of, or over, the mine opening, provided the opening is not in direct line with possible forces coming out of the mine if an explosion occurs, and provided further that there is another opening having a weak-wall stopping or explosion doors that would be in direct line with the forces coming out of the mine if an explosion occurs, such opening to be not less than 15 feet...