BLAST VIBRATIONS
IN OIL SHALE SURFACE MINING
A. TOOMIK
Institute of Ecology
North-East Estonian Department
Pargi 15, Jõhvi EE2045, Estonia
T. TOMBERG
Tallinn Technical University
Mining Institute
Kopli 82, Tallinn EE0004, Estonia
| The blast vibrations were studied in the soil of quaternary sediments and in Ordovician limestone in mining area. The measurements were performed by seismograph DS-277 Blast-Mate Series II of Instantel Inc. and seismograph UVS-1500 of ABEM Instruments AB. The analysis of measured data pointed at a good correlation between vibration velocity and scaled distance from charges. The formulas for prediction of vibration velocity and for maximum charge weights were elaborated for both vibration media - soil and limestone. |