Experiment on Blasting Parameters Optimization in Roadway Excavation with Large Section

According to the situations of hard rock, the low utilization ratio of porthole and the low advance per round in the driving construction of Xinji No.2 Coal Mine. Through the use of physical and mechanical properties of rock mass parameters, we analyze the mechanism of blasting under the condition of high stress and optimize blasting parameters used in the roadway drivage, which increases the utilization factor of boreholes and advance per round, and realizes roadway excavation with quality and efficient.