Engineering Practice in Blasting Excavation of Underground Workshop′s Rock Anchor Beam in Complex Conditions

In the excavation of underground workshop′s rock anchor beam for the Bailianhe Hydropower Station,the zoning and stepping excavation to protect area was used according to the characteristics of the geological structure.The optimal excavation scheme and blasting parameters were determined through the optimal blasting parameters and the optimal excavation scheme to proceed field test of various plans.The quality of formed rock bench have been obtained.