Abstract:In order to ensure the safety of underground corridor blasting, this work proposes a scheme that mechanical excavation of inclined corridor is first conducted to create free surface, followed by millisecond blasting of deep-hole bench. In order to avoid the damage caused by the flying objects from blasting to the adjacent board house and derrick equipment, a double-layer isolation rack is set up for protection. One row of vibration reduction holes is arranged on both sides of the corridor. The distance between the vibration reduction hole and the edge blasting hole is set to 2.5m, the distance between the vibration reduction holes is set to 0.6m, and the depth is set to 10m, so as to reduce the possible damage caused by blasting vibration waves to temporary buildings and equipment units. The results show that the blasting fragmentation of the corridor foundation pit is good, the excavation is smooth, the double-deck house and nearby buildings are less affected, indicating the proposed blasting scheme can provide reference for similar projects.