Peak particle velocity of vibration events in underground coal mine and their caused stress increment

Peak particle velocity (PPV) is the most basic and direct parameter of vibration event to connect with stress increment, so they are studied in this paper through statistics and analysis. The vibration events in underground coal mine can be divided into whole mine (WM) event, working face (WF) event and heading face (HF) event, and the WM event normally has the lowest dominant frequency and maximum PPV. Rock burst may occur when PPV causes its corresponding stress increment to reach the triggering value, and PPV should be used as monitoring index, rather than the only adopted post-processing indicators like event energy. The study also discussed about the relationship between event magnitude and PPV and their caused stress increment, which has important reference significance for mechanism study and early warning of rock burst.

Automated summary

Peak particle velocity (PPV) is studied in this paper as the most basic parameter to connect with stress increment in vibration events, with focus on events in underground coal mines. Different types of events, such as whole mine (WM) event, working face (WF) event, and heading face (HF) event, are analyzed, with emphasis on the relationship between PPV, stress increment, and event magnitude for mechanism study and early warning of rock burst.