岩溶区隧道爆破开挖地震危害控制的研究

隧道爆破开挖是爆破安全工程问题 ,也是工程质量安全问题 ,从长远考虑更是安全及环保问题 ,因震害的潜隐性和危害性 ,必须对其从宏观与微观、工程及周边环境全面考虑。笔者结合爆破作用下微裂纹扩展机理的分析 ,将爆破震速耦合到裂纹损伤断裂条件中 ,得到爆破震动的安全控制标准计算公式 ,结合工程实例 ,给出了不同条件下岩溶区隧道爆破开挖安全控制的建议标准 ,并且提出了爆破地震危害的控制措施 ,为类似工程提供参考。

Study on Controlling Vibration Hazard of Tunnel Cave Blasting in Karst Area

Tunnel blasting is not only a problem of safety and quality of the tunnel engineering, but also a problem of environment protection. Due to the hidden and latent property of vibration hazard produced, it is necessary to study both from micro and macro points of view and from engineering project itself and its surroundings. Based on the analysis of the extension regularities of micro-crack under blasting, and by coupling the blasting vibration velocity into micro-crack damage, an equation for calculating the safe control of blasting vibration velocity is obtained. Combining with real project case, a tentative standard for safe control of blasting vibration velocity is suggested, which could be referred by other similar project.