The results show that mighty compound cutting can give a good effect of sinking and blasting in hard rock shaft, and sinking velocity adopted for 2.
试验表明：强力复合掏槽在特硬岩立井掘进爆破中应用效果良好；2。
The results show that mighty compound cutting can give a good effect of sinking and blasting in hard rock shaft, and sinking velocity adopted for 2.
试验表明：强力复合掏槽在特硬岩立井掘进爆破中应用效果良好；2。
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