Mine Induced Seismicity: Investigation on Post-Blast Sequences
İrem Erguncu Güçlü Savka Dineva
AbstractThe depth of the mining operation increases with time to meet the needs of the industry and the society. However, working at great depths brings extreme safety problems. One of the major problem is the stress conditions at the deeper production levels. Due to mining operations, local stress conditions are changing. In many mines the ore is fragmented by blasting. This has a great sudden impact on the stresses – dynamic or static. That is why this kind of activities may trigger seismicity. The duration, intensity and the magnitude of the seismic events in the post-blast sequence is important because the waiting time after blasting (re-entry time) is determined by these criteria. Understanding the behavior of the seismicity in the underground mines becomes vital to avoid any extreme hazard, which has to be investigated for each mine due to its unique conditions. Therefore, researchers and mining engineers spend a lot of time and effort to understand the characteristic of post-blast sequence to increase safety, especially, at the deeper level of mining. In this study, literature review is presented in situations of different underground mines with some case studies and result on post-blast seismicity problems.