Analisis Dampak Getaran Tanah pada Kegiatan Tunneling di Batuan Breksi, Kabupaten Lombok Barat, NTB

Abstract

1. 1. Indra Karya uses the blasting method in the process of digging diversion tunnels in the meninting dam. Problems that often occur in blasting activities are rock damage outside the parameters due to uncontrolled blasting and the impact of vibration on the surrounding environment. The purpose of this study was to analyze the level of ground vibrations that meet the quality standards according to SNI 7571:2010 and the Decree of the Minister of Environment (KEPMENLH) No.49 of 1996. The method in this research is a qualitative method, in which comparative analysis is carried out between the value of ground vibrations resulting from blasting adjusted to the standards of vibration quality standards. The results showed that the resulting ground vibrations referred to KEPMENLH Number 49 of 1996 with a total of 19 blasting times, where category A totaled 15 with a percentage of 79% and category B amounted to 4 with a percentage of 21%. While referring to SNI 7571:2010 ground vibrations are in category 1. The influence or impact of ground vibrations due to blasting to the area around the blasting site is the appearance of small cracks in residents' houses, but not dangerous. Ground vibrations caused by blasting are not dangerous because the vibrations are still below the quality standard for residential areas around the blasting site.