ESTIMATION OF FACTORS INFLUENCING THE PRODUCTIVITY OF LHD MACHINES INESTONIAN OIL-SHALE MINES

Since the end of the 1980's LHD vehicles are the most widely used mach ines for loading and transportation in Estonian oil shale mines with r oom-and-pillar mining. This paper presents a simple method based on th e use of valuation points for the quick estimation of the job efficien cy of LHDs in Estonian oil shale mines. Due to a more correct definiti on of the job conditions and their intensity we think that this system of assessment also enables to show more objectively and correctly the actual productivity of the machines. So the factors influencing the w ork of the LHDs in oil shale mines are given in points of assessment p roceeding from relevant research and expertise.