【摘要】 许疃煤矿3222工作面采用深孔松动爆破技术过断层,通过现场实测数据分析了炮孔周围巷道围岩爆破振动衰减规律,建立了巷道松动圈受柱状装药爆破振动影响的力学模型,得出围岩动态松动圈半径的计算公式,并阐述了爆破的累积损伤效应,为巷道安全支护设计提供了依据。更多还原

【Abstract】 The deep-hole loose blasting has been used to pass through the fault in No.3222 face in Xutuan coal mine.With the field measured data,the paper has analyzed the vibration attenuation law in surrounding rock around the blasting holes and established the mechanical model to explain the impact of vibration from column blasting on roadway loose circle,and obtained the formula of dynamic loose circle radius in surrounding rock,and also described the effect of cumulative damage of blasting,which have provided foundation for roadway supporting design.更多还原