Vibration events in underground heading face and useful index for rock burst monitoring

Microseismic (MS) monitoring is a prevailing monitoring method especially in the working face of coal mines to predict rock burst, but MS monitoring technology in heading face is not mature due to small disturbances and unclear monitoring indicators. Through field tests in heading face, a more accurate and effective monitoring index was obtained: the number and strength of large energy (three-channel and four-channel triggering) coal vibration...