The investigation of ground vibration measurements at an agregate quarry in Istanbul-Turkey

Abstract

In this study, the vibration and air shock measurement results are given in order to evaluate the environmental results of excavation works with explosions executed in the agrega quarry by İlkdal Mining Industry Ltd. Corp. which is working in the borders of Kemerburgaz region of Eyüp county in İstanbul city on producing agrega. The blasting pattern, explosive material charge parameters and vibration measurement results of each blastings are recorded. In the research, the frequency and particle velocity quantities of 31 events of overall 6 different blastings which are take place all in the area which is in question in different times are determined with recording devices. Then, in order to determine particle velocity, scaled distance and particle velocity data are analysed fort he area in question. During this analysis, distance equality with square root and scale which is widely used in literature is used. In the end of evaluation, for the area in question, between the scaled distance and particle velocity, with a prediction tolerance of 95%, an empirical connection with a good correlation (r=0,75) is obtained and recommended. By using this connection, the highest particle velocity, tables which cotain the prediction of the maximum charge quantities per delay are given and some suggestions which should be taken in care in the next works are put forward and these will provide practical easines in usage in future blastings. To compare and estimate the impact levels of the results obtained from the area in question on the surrounding buildings and institutions; with taking frequencies of particle velocity components in consideration, are evaluated according to universally accepted German DIN 4150 Norm, USBM Norm and T.C. Ministry of Environment and Forest's Regulation of Management and Evaluation of Noise.