五角空心掏槽技术在巷道掘进中的应用

Application of the technique of pentagon hollow cutting-in in tunneling

文中详细介绍了五角空心掏槽技术的参数布置及技术要求，通过采用此技术在硬岩石中进行掘进实践，使爆破效率提高，对提高硬岩石的掘进效率具有一定的参考价值。

The parameter layout and requirement of the technique of pentagon hollow cutting-in are introduced. Through application of this technique in tunneling of hard rock, the blasting efficiency is improved. This technique is of great reference to the improvement of tunneling efficiency of hard rock.