Modify Selection
- Document types:
- Reports of Investigations
Home Links
Results 101 - 110 of 270
-
1/1/1993 - Reports of InvestigationsThis report investigates the removal of gate road chain pillars in conjunction with longwall retreat mining. The objective was to determine how the pillars, supplemental support, and entries were affected by the longwall abutment pressure.
-
1/1/1993 - Reports of InvestigationsThe U.S. Bureau of Mines, under a Memorandum of Agreement with the American Society of Mechanical Engineers (ASME), established design criteria for a facility to melt residues from municipal waste combustion.
-
1/1/1993 - Reports of InvestigationsThe U.S. Bureau of Mines investigated a method of using inert gas to prevent the formation of explosive gas mixtures in auger highwall mining of coal. A combination of gasoline and diesel engine exhaust gases was introduced into the auger drill hole us...
-
1/1/1993 - Reports of InvestigationsThis report presents results of a U.S. Bureau of Mines study of longwall gob material. The objective of this work was to determine material stiffness properties of the gob for use in numerical models or rock mass response to longwall mining.
-
1/1/1993 - Reports of InvestigationsCatalyzed diesel particulate filters (CDPFs) reduce the concentration of diesel particulate matter (DPM) and may reduce the emissions of carbon monoxide (CO) and hydrocarbons (HC) in diesel exhaust.
-
1/1/1993 - Reports of InvestigationsThe U.S. Bureau of Mines conducted research at the Galena Mine, Wallace, ID, with the aim of mitigating the effects of rock bursting.
-
1/1/1993 - Reports of InvestigationsA prototype end-cab shuttle car (SC) design has been developed to improve protection and address ergonomic concerns of the SC operator in low coal mines. This report discusses research to modify a used 21SC JOY SC, retrofit the SC with the Bureau-devel...
-
1/1/1993 - Reports of InvestigationsThe U.S. Bureau of Mines, in conjunction with Carter Mining Co., conducted vibration tests of four off-road vehicle seats. The purpose of the tests was to determine which seat provided the best vibration attenuation under laboratory conditions.
-
1/1/1993 - Reports of InvestigationsA unique machine for inducing bending fatigue in wire ropes was built at the U.S. Bureau of Mine's Pittsburgh Research Center. This report provides an analysis of the results of the first wire rope to be fatigued on this machine.
-
1/1/1993 - Reports of InvestigationsU.S. Bureau of Mines, researchers tested ultrasonic ranging sensors for their ability to define rib line features for computer-aided navigation of underground mine mobile equipment.
Home Links
Content source: National Institute for Occupational Safety and Health, Mining Program