Risk Assessment of Blast Wave in Tunnel Based on FAHP-GRA Theory

The theoretical research of blast wave is complex and uncertain. In order to reduce the damage of blast wave to personnel and equipments, it is necessary to evaluate the safety risk of tunnel blast wave. Based on a highway tunnel in Fujian, the blast wave risk was effectively identified by combining relevant specifications and literature, and a blast wave risk evaluation index system of tunnel drilling and blasting method construction was established. Combining Grey Relational Analysis with Fuzzy Analytic Hierarchy Process, a tunnel blast wave risk assessment model was established. According to the analysis of quantitative calculation results, the corresponding risk grade of tunnel blast wave in the evaluation set could be obtained. Depending on the correlation degree of each index obtained from the evaluation results, corresponding measures could be taken to reduce the risk of the tunnel blast wave. The evaluation system and model can be used as reference in similar projects.