The impacting test conducted indicates that free surface contributed to improve blasting effect.
冲击试验表明，自由面有利于改善爆破效果，研究结果对工程实践有一定的参考价值。
The transient release of excavation load is accompanied by the development of cracks, the outburst of detonation gases and the formation of new free surface during the rock fragmentation by blasting.
岩体爆破开挖过程中，开挖荷载瞬态卸荷伴随着爆破破岩的裂纹扩展、爆生气体逸出以及新自由面形成等过程而发生。
The transient release of excavation load is accompanied by the development of cracks, the outburst of detonation gases and the formation of new free surface during the rock fragmentation by blasting.
岩体爆破开挖过程中，开挖荷载瞬态卸荷伴随着爆破破岩的裂纹扩展、爆生气体逸出以及新自由面形成等过程而发生。
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