大断面岩巷掘进爆破参数优化试验

Experiment on Blasting Parameters Optimization in Roadway Excavation with Large Section

针对新集二矿岩巷掘进施工中存在岩石硬度大、炮眼利用率低、单循环进尺低等情况,通过利用岩体的物理力学性能参数来分析研究高应力条件下的岩体爆破破裂机理,以此优化巷道掘进过程中使用的爆破参数,提高炮眼利用率和单循环进度,实现巷道的优质高效掘进。

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.