Energy Action Mechanism of Coal and Gas Outburst Induced by Rockburst

Figure 1

Sketch map of split Hopkinson pressure bar testing system. 1: air cannon; 2: drop bar; 3: laser unit; 4: laser receiver; 5: incident bar; 6: resistance strain gage; 7: test specimen; 8: transmission bar; 9: absorbing bar; 10: bumper; 11: superdynamic strain gauge.