The results show that mighty compound cutting can give a good effect of sinking and blasting in hard rockshaft, 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。
2
Based on the demand of present code, using the calculation of bearing capacity of pile shaft and subgrade bearing capacity for pile, vertical experimental load of embedded rock pile is ensured.