含水和不含水岩体隧洞群爆破开挖的震动比较

一般地下岩体中都含有孔隙水，孔隙水的存在对于隧洞爆破工程有着重要影响。多条隧洞爆破开挖时，含水隧洞围岩在爆破激励作用下，巷道之间也会互相影响。采用现场爆破监测和数值计算相结合的方法，对含水、不含水2种不同的工况进行了计算研究：对隧洞群的爆破开挖进行了监测，提取其中较强的震动信号，根据最不利工况的选择，把它加载到根据实际情形建立的地下隧洞群模型上，模拟某次实际的爆破过程。提取计算时程中不同巷道部位较危险位置围岩点的震动数据加以分析，得到饱和水围岩在爆破震动下的变化规律，对含水围岩的安全趋势做出研判，对同类工程的安全施工作业具有参考价值。

Comparison of Vibration in Excavation Blasting of Tunnels in Saturated and Drained Rock Mass

Pore water in underground rock mass plays an important role in tunnel blasting engineering. When several tunnels are excavated together,the tunnels may interact with each other due to the surrounding rock blasting process. Combined with in-situ monitoring and numerical computation,the cases in the saturated and drained rock mass were performed respectively. The excavation blasting of tunnels was monitored and a tunnel excavation simula-tion model was established according to the actual conditions under the worst circumstances by loading strong blasting vibrating. The vibrating characteristic of saturated rock mass blasting was obtained by extracting and analyzing the vi-brating data of surrounding rock at different parts of tunnels. The study helps to identify the security of saturated rock as a reference to safe blasting operation in similar blasting project.