Which boards are needed for prevention and control of coal mine rockburst?

Warning, limited personnel, split the board. An early warning device for preventing and controlling coal mine rockburst comprises a first fixed plate, a second fixed plate, a third fixed plate, a guide sleeve, a pipe body and a sleeve, warning signs for areas needing to be impacted, management boards for areas with limited personnel and division boards for impact dangerous areas. Among the monitoring and early warning methods for preventing and controlling rockburst in coal mines, the drilling cuttings method is one of the most economical and effective methods for predicting rockburst in coal mines. According to the amount of coal powder at different drilling depths and the macro-dynamic phenomenon during drilling, the stress state in coal rock mass is evaluated.