BLAST VIBRATIONS IN OIL-SHALE SURFACE MINING

The blast vibrations were studied in the soil of quaternary sediments and in Ordovician limestone in mining area. The measurements were perf ormed by seismograph DS-277 Blast-Mate Series II of Instanter Inc. and seismograph UVS-1500 of ABEM Instruments AB. The analysis of measured data pointed at a good correlation between vibration velocity and sca led distance from charges. The formulas for prediction of vibration ve locity and far maximum charge weights were elaborated for both vibrati on media - soil and limestone.