Experimental Study on Rock Bench Blasting Excavation in Underground Workshop of Xiluodu Hydropower Station

The rock bench excavation of rock-bolt crane beam is the key and difficult step in the construction of underground workshop of Xiluodu Hydropower Station.The technology requirements and the quality controls are rigid for boring and blasting.For desired blasting effects,different blasting parameters are adopted in the experiments of vertical holes and acclivitous holes smooth blasting in integrated and broken zones.A set of optimized construction procedure and blasting parameters are set down by comparison of different experiments and analysis of blasting vibration monitoring and broken rock zone tests.