为利于判断巷道围岩在爆破荷载作用下的稳定性及巷道内壁混凝土衬砌的安全,采用ANSYS/LS-DYNA分析了巷道钻爆法掘进爆破荷载作用下震动区岩体的动力响应。结果表明,近区岩体内部爆破压力、单元有效应力、质点振动速度随爆心距的衰减规律基本符合萨道夫斯基经验公式,单元有效应力与质点振动速度的衰减规律具有很强的相关性;巷道围岩临空面上的质点振动速度以沿巷道方向的振动速度为主,巷道横截面内垂直临空面方向次之,横截面内沿临空面方向为最小。巷道同一横截面处各质点的振动波形基本相同,拱顶的振动速度峰值比帮部的要大10%左右,拱与帮的连接处振动速度峰值较小。巷道围岩沿巷道方向临空面上质点振动速度衰减规律也基本符合萨道夫斯基公式,以上分析结果对采用钻爆法进行岩巷施工时,控制近区震动区爆破荷载对结构的影响具有一定的指导作用。 In order to analyze the stability of roadway surrounding rock under blasting load and the safety of concrete lining in roadway, the dynamic response of rock mass in vibration zone was analyzed by ANSYS / LS-DYNA. The results show that the decrement rule of bursting pressure, effective stress and particle vibration velocity with the burst center distance in rock near the rock mass are basically consistent with the Sadowssky empirical formula, and the effective stress of the rock mass is strongly correlated with the attenuation law of particle vibration velocity. The vibration velocity of the particle on the free surface of surrounding rock of roadway is dominated by the vibration velocity in the direction of the roadway. The direction of the vertical plane of the plane in the cross section of the roadway is second, and the direction of the plane of vibration in the cross section is the smallest. The vibration waveforms of each particle at the same cross-section of the roadway are basically the same, the peak vibration velocity of the vault is about 10% larger than that of the gang part, and the peak vibration velocity at the connection of the arch and the helix is ​​smaller. The law of attenuation of the vibration velocity of the particle near the freeway along the direction of the roadway is also basically in accord with the Sadowssky formula. The above analysis shows that when the blasting method is adopted for rock roadway construction, the influence of the blasting load on the structure in the vibration zone in the vicinity has A certain guiding role.