光面爆破技术在隧道Ⅲ级水平围岩中的应用

Smooth Blasting Technique in Tunnel Ⅲ-grade Horizontal Surrounding Rocks

以包西铁路洞子崖隧道掘进开挖为例,介绍了光面爆破技术在隧道Ⅲ级水平围岩施工中的应用。通过实践和多次参数调整,对光面爆破的参数设计、遵循的原则及参数的选择、调整、优化等进行了论述,并提出了施工建议及技术控制措施及要点,为以后类似地质情况下的隧道爆破开挖提供理论依据和数据参考。

This paper, using advancing and excavation in Dongziya Tunnel of Baotou-Xi＇ an Railway as example, which is constructed by our company, introduces the application of smooth blasting technique in the construction of tunnel Ⅲ grade horizontal surrounding rocks. Through practice and several parameter adjustments, parameters design and principles of the smooth blasting, choice, adjustment, optimization of parameters are elaborated, with construction suggestions and technical controls and key points put forward, which can be theoretical and data reference for tunnel blasting and excavation in similar geographical conditions.