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在冲击矿压危险的煤矿巷道掘进施工中,爆破作业是冲击矿压的主要诱发因素。通过对爆破诱发冲击矿压的原因进行分析并结合微震监测到的爆破诱发冲击矿压的事件对微震波形进行的频谱分析。认为对冲击起主要诱发因素的是爆破产生的应力波和地震波,其增加煤体的动应力和破裂面的应力反射诱发了冲击。爆破震动波相对于冲击矿压产生的震动波是高频、低能量、作用时间短的事件。爆破震动波本身不能产生冲击矿压,而是使处于极限应力平衡状态下的煤体发生了突变。
Blasting operation is the main inducing factor of rock burst in mine roadway construction with danger of rock burst. By analyzing the causes of blasting induced rock pressure and combining with the burst induced rock burst induced by microseism, the spectral analysis of the microseismic waveform was carried out. It is considered that the main inducing factors for the impact are the stress waves and seismic waves generated by the blasting, which increase the dynamic stress of the coal body and the stress reflections of the rupture surface to induce the impact. The vibration wave generated by blasting vibration wave relative to rockburst is high frequency, low energy and short acting time. Blasting shock wave itself can not produce rockburst, but to make the coal under the ultimate stress equilibrium change suddenly.