Analysis of ground vibration due to blasting using variation of scaled distance method in limestone mine

Currently, construction development is increasingly being carried out in Indonesia. In this case, PT. Indocement produces cement to meet these needs. Cement is produced from the earth’s limestone (limestone). In an effort to meet their production needs, they carry out their own limestone mining. Blasting is chosen to dismantle the limestone mass. However, blasting also has a negative impact due to the release of large amounts of energy that can damage building structures or interfere with human comfort. Based on the AMDAL’s location close to residential and office buildings, it is necessary to conduct research on the vibration and sound of the blasting. The data obtained is secondary data collected from 2017 to 2021. The method used is quantitative and comparative, namely processing using Scaled Distance theory to obtain future vibration predictions according to company standards to meet SNI 7571:2010, then compared with other Scaled Distance models. (Indian Standard, Langefors & Kiehlstrom, and Ambraseys-Hedron). The measurement results show that some exceed the set standard. The calculation results with predictions that are close to the actual value are the Scaled Distance model of the Ambraseys-Hedron equation with an average percent correction of 29,92% from the Ambraseys-Hedron equation, the constant (k) of 2811,9 & (m) - 1,503 with a determination (R2) of 0,662. The prediction of the maximum explosive material that fits the PPV standard is done with several variations of the 50-meter interval that can be adjusted to mine progress in the future with the USBM model. Then the prediction results of explosives are used to determine the SPL prediction, which is for a distance of 500 meters at 80 dB for the PPV parameter of 2,5 mm/s according to company standards from the reference of SNI 7571:2010.