During tunnel blasting construction,conventional blasting methods have low explosive utilization rate,produce more dust and cause great environmental pollution.In order to improve these shortcomings,taking the Tuanshan Tunnel blasting construction as the background,a hydraulic blasting scheme is adopted.The tunnel is excavated by a single side heading method,and the blasting scheme is designed,in which the blast hole diameter is 42 mm.The single wedge cutting is adopted.The distance between peripheral holes is 40 cm and the resistance line distance is 50 cm.The distance between auxiliary holes is 100~120 cm,and the resistance line distance is 80~100 cm.The distance of holes on the tunnel floor is 60~70 cm,and the resistance line distance is 50~60 cm.The smooth surface blasting is adopted for the periphery,the smooth blasting controlled by microseismic is adopted for unfavorable geology and shallow buried sections,and the settlement and horizontal convergence of tunnel vault are monitored after blasting.Compared with conventional blasting,the results show that hydraulic blasting can increase the energy utilization rate of explosives,enhance the blasting effect,shorten the construction time,increase economic benefits,reduce dust,and protect the environment.The monitoring results show that the hydraulic blasting has less damage to the surrounding rock mass of the tunnel,which can better maintain the stability and ensure the safety of subsequent construction.