摘要
以新风平岭2号隧道复线隧道进口开挖为研究对象,通过在隧道施工爆破过程中对邻近隧道进行现场的振动监测,应用萨道夫斯基经验公式对现场监测数据进行回归分析,控制不同目标、不同间距情况下最大起爆药量,炮眼布置方案等。既有隧道和新开发隧道间采用超前锚杆加固,增强稳定性。通过对振速波形图的分析,找到延时爆破最大振速的段位,降低该段位最大装药量以便降低最大振速,保证邻近隧道振动速度控制在安全范围内,指导后续施工。
Taking the entrance excavation of Xinfengpingling No. 2 double-track railway tunnel as a research goal, and through the on-site monitoring on adjacent tunnel vibration blasting process in tunnel construction, Sadaovski formula is ap- plied to making the regression analysis of the field monitoring data, and controlling maximum detonation quantity under dif- ferent objective and different spacing, and hole arrangement etc.. The forepoling bolts are adopted between the existing tun- nel and newly-developed tunnel to enhance the stability. Through the analysis on the waveform of the vibration velocity, the maximum velocity section of delay blasting is found out. Reducing the maximum charge quantity can lower the maximum vi- bration velocity and control the vibration velocity of adjacent tunnel within a safe range, thus guiding the follow-on construc- tion.
出处
《金属矿山》
CAS
北大核心
2013年第10期32-35,39,共5页
Metal Mine
关键词
复线隧道上下分阶爆破爆破震动
萨道夫斯基经验公式
注浆锚杆加固
Double-track tunnel, Sublevel blasting, Blasting vibration, Sadaovski formula, Grouting and anchoring rein-forcement
