STUDY OF ROCKBURST DAMAGE POTENTIAL BY USING MICROSEISMIC DATA ON DIORITE ROCKS AT PRODUCTION LEVEL OF BLOCK CAVING MINE XYZ

• Main Author: KHARISMA (NIM : 12114008), PANDU
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/29902
• Institution: Institut Teknologi Bandung

Underground mining activities can have a direct impact on rock mass stability. Block caving underground mining methods may pose a risk to workers working around the area. The main concern in this mining system is its relation to dynamic rock mass failure, often called mining induced seismicity. When higher voltage conditions are encountered (usually at depth), or in unfavorable geological conditions, rock mass is likely to produce larger seismic events. When the failure of rock mass results in great damage to the opening opening, it may be indicated as rockburst (Ortlepp, 1997). Rockbursting is one of the greatest dangers present in an underground mine environment and poses significant risks to workers, mining equipment, and openings. In this study selected research sites at level produksi located at Level 2590 masl which is the production area of the block caving mine XYZ PT ABC, with Diorit homogeneous homogeneous lithology. Microseismic data can provide insight into changes in local geology and stress conditions in rock mass. Identifying conditions that tend to produce large (hazardous) seismic events prior to the occurrence of failure in rock mass is the key to minimizing risk. The main objectives of seismic monitoring in the mine are, among others, to indicate the potential location for the damage caused by rockburst. The relationship between the largest rock mass movement (PPV) with potential excavation vulnerability (EVP) on the Rockburst Damage Scale (RDS) recommended by Kaiser et al. (1992) can show the range of PPV (m / s) values for each damage scale. In the drift and drawpoint panels: the PPV value for R1 = 0 m / s - 0.857 m / s; R2 = 0.857 m / s - 2.25 m / s; R3 = 2.25 m / s - 2.97 m / s; R4 = 2.97 m / s - 3.97 m / s; R5 = 3.97 m / s - undefined. At the intersection: the value of PPV for R1 = 0 m / s - 0.285 m / s; R2 = 0.285 m / s - 0.75 m / s; R3 = 0.75 m / s - 1 m / s; R4 = 1 m / s - 1.35 m / s; R5 = 1.35 m / s - undefined.