BLASTING VIBRATION ANALYSIS FOR VARIATION OF ROCK STRENGTH AT PT AMMAN MINERAL NUSA TENGGARA

• Main Author: Rapi, Muhammad
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/86374
• Institution: Institut Teknologi Bandung

PT Amman Mineral Nusa Tenggara operates a mine in Batu Hijau Pit, Sumbawa Island, which is one of the largest mining companies in Indonesia with copper and gold as the main commodities. In order to support mining activities, one of the mining processes is blasting. One of the negative impacts resulting from blasting activities is the resulting ground vibration. Based on the characteristics of material hardness, it can be divided into several domains including soft, moderate, and hard. To measure the level of ground vibration, one parameter that is often used is Peak Particle Velocity (PPV). Some empirical equations used are USBM, Langefors- Kihlstrom, Ambraseys-Hendron, Indian Standard, and CMRI. To get a prediction equation from each empirical equation, the relationship between PPV and scaled distance from 70% of the data is determined. Then, the results of the prediction model from several empirical equations were evaluated by considering the values of R2, MAE, and RMSE. Based on the values of R2, MAE and RMSE, the most accurate prediction equations are Langefors-Kihlstrom, Indian Standard, Ambraseys Hendron, CMRI, and USBM, respectively. Then the constant K is determined for each domain. Furthermore, in order to provide a measure of accuracy in predicting, a 95% confidence level is used, then 30% data testing is carried out, if there is error data, data retraining is carried out. So as to obtain the latest most accurate equation that can be used to predict ground vibration from blasting in each domain.