Abstract: To improve drainage efficiency and ensure tunnel operational safety, an SPH-FEM(smoothed particle hydrodynamics-finite element method)coupled computational model was established based on the construction of the Qinghai Saierlong No. 2 Tunnel. A comparison was made of rock damage evolution, blast-induced cavity dimensions, and rock ejection effects under different borehole arrangements(vertical drilling and wedge-shaped drilling). The research results showed that the overall extent of rock damage was generally consistent under both drilling patterns. However, wedge-shaped drilling was more prone to overbreak or underbreak at the trench bottom, which was unfavorable for blast-induced contour control. Although the blast contours were similar under both configurations, wedge-shaped drilling resulted in a larger cavity volume and a wider cavity opening compared to vertical drilling. The wedge-shaped drilling layout was optimized considering contour quality and particle ejection efficiency. This optimization reduced the particle ejection velocity while maintaining satisfactory contour formation and particle ejection quantity, thereby providing a reference for the efficient construction of deep-buried drainage ditches.
张海兰,吴云鹏,邹仁,马晓龙,李坤泰,高启栋,牛磊,周海孝. 基于SPH-FEM耦合模拟的隧道深埋排水沟爆破技术优化研究[J]. 隧道与地下工程灾害防治, 2025, 7(3): 93-104.
ZHANG Hailan, WU Yunpeng, ZOU Ren, MA Xiaolong, LI Kuntai,GAO Qidong, NIU Lei, ZHOU Haixiao. Optimization study of blasting technology for deeply buried drainage trench in tunnel based on SPH-FEM coupled simulation. Hazard Control in Tunnelling and Underground Engineering, 2025, 7(3): 93-104.
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2025, Vol. 7 
