실측에 의한 영남지역의 발파진동상수(K,n)와 표준품셈과의 비교 연구

Abstract

This study has been carried out with the actual calculation in the Young-nam area for the past couple of years in 5 places in order to understand the blasting vibration constant and the decrement constant and its results had been analyzed through the recurrence analysis method by way of minimum squaring method. Based on this calculation, the distance for maintaining a specific vibration speed as per each blasting patterns was calculated and compared with the standard calculation table. 1. Blasting vibration constant and decrement constant for each sites 2. Comparison with standard calculation table Blasting vibration constant K had shown 105.75-146.6% of the standard calculation table value. Decrement constant n had shown 96.25-100% of the standard calculation table value. 3. The distance required for obtaining the same blasting vibration speed needs more distance by min. 11.5% and max. 50.% than the value suggested by the standard calculation table value. This means more higher value than the expected blasting vibration speed when the blasting work is taken place with the standard calculation value in the Young-nam area and in order to obtain the expected blasting vibration speed, the distance should be increased by up to 11.5-50.4% and accordingly work volume becomes differed as per each work patterns and the construction cost is made to be increased. 4. In places where the blasting vibration constant is calculated to be high considerably comparing with the standard calculation table, we can find the base rock intensity to be generally high, which shows regional characteristics as it is. If the location of the site where calculation is carried out is neighboring with or near to the seashore, the base rock intensity around this location is generally high.