埋深对小净距隧道中夹岩爆破振速的影响

Study on impact of buried depth to blasting vibration velocity of inter-space rock of small interval tunnle

通过数值模拟,分别对1.0D,2.0D,3.0D和5.0D埋深下中夹岩的振动特性进行了分析,并与实际埋深5.8D进行了对比,结果表明,埋深越大,中夹岩的振动速度越小,但超过3D时,埋深对振速的影响可忽略不计,不论是水平并平行隧道轴线方向或垂直方向上,Z方向的振动速度对埋深的影响都较为敏感。

Based on the numerical simulation, the vibration characteristics of the inter-space rock under the depth of 1.0D, 2. OD, 3. 0D and 5.0D were analyzed and compared with the actual depth of 5.8D. The results show that the greater the depth, the smaller the vibration velocity clip rocks, but more than 3D, the depth on the impact velocity is negligible, whether horizontal and parallel to the tunnel axis direction or the vertical direction, Z direction vibration the impact of speed on the depth is more sensitive.