摘要
在赵山渡引水工程上安隧洞和许岙隧洞进口两隧洞的工程实践中，采用了"V"形掌子面，大大提高了同类围岩的炮孔利用率，使钻孔利用率达到95％～102％，增加了单循环进尺，降低了开挖成本，笔者认为这一应用值得在隧洞开挖施工中推广，并且能给施工单位带来良好的经济效益。
In the engineering practice of excavating the Shangan tunnel of ZhaoshanduDivesion Works and Xuao tunnel, a concept of V - shaped heading face was put forward. After the application of the heading face, the utilization ratio of shothole of similar surrounding rocks can be greatly improved, the utilization ratio of drilling can reach95 % ~ 105 %, the monocyclic footage is increased, and the excavation cost is decreased.The author thinks that the application of V - shaped head face in tunnel excavation isworth being spread in the course of implementation.
出处
《爆破》
CSCD
1999年第4期75-77,82,共4页
Blasting
