巷道围岩爆破地震效应的模拟和解析对比分析  

Comparison of Numerical Simulations and Analytic Solutions about Blasting Seismic Effects in Surrounding Rock

作　　者：吴建[1] 陈士海[1,2] 

机构地区：[1]华侨大学土木工程学院,福建厦门361000 [2]山东科技大学土木建筑学院,山东青岛266510

出　　处：《地下空间与工程学报》2014年第5期1217-1222,共6页Chinese Journal of Underground Space and Engineering

基　　金：高等学校博士学科点专项科研基金(20113718110002);爆炸冲击防灾减灾国家重点实验室开放课题(DPMEIKF201307);华侨大学科研基金项目(13BS402)

摘　　要：对某巷道围岩爆破工程进行数值模拟来分析爆破地震波在围岩中的传播规律,通过数值模拟分析结果与解析解进行对比,发现两者得出的结论类似。在爆破地震波的影响下围岩质点的峰值速度变化呈一定规律,对不同径向距离和轴向距离条件下质点峰值速度的变化规律进行比较,可以发现围岩中质点的峰值速度随着径向距离呈现正负号交互的波浪式衰减,即围岩可能出现交替拉压状态以及分区破裂现象,而质点峰值速度随着轴向距离的变化相对简单,主要表现为非线性的快速衰减。The propagation law of blasting seismic waves in the surrounding rock is discussed in this paper through numerical simulations method. A similar result was found after comparing numerical simulations with analytic solutions. The particle peak velocity in surrounding rock showed a certain law under the influence of seismic waves. By comparing the peak velocities of rock particle in different radial and axial distance we can find some laws which are displayed below. The particle peak velocity in the surrounding rock shows attenuation in form of wave with the increasing of radial distance, namely in alternating tension and compression state and zonal disintegration phenomenon appear. Besides, the particle peak velocity in surrounding rock attenuates quickly in the form of non-linear with change of axial distance.

关 键 词：巷道围岩 爆破地震波 数值模拟 速度场 

分 类 号：O382.2[理学—流体力学]