基于FLAC2D的岩质单面边坡爆破响应规律研究

基于FLAC2D程序,建立了二维岩质单面边坡在爆破荷载作用下的数值模型,并对模型建模中发现的一些问题进行讨论,揭示了边坡的自振频率随着坡高的变大而减小的趋势。在此基础上,通过改变边坡的坡高和坡角,以系统的速度峰值为边坡动力响应评判标准,验证了在动荷载作用下,边坡不但会出现边坡放大效应,而且随着坡高的增大,速度值有先增大,后减小的趋势。当边坡坡角为同一角度时,随着坡高的逐渐增大,质点的最大速度极值存在逐渐变大的趋势。

Research on Dynamic Response of Rock Single-free-surface Slope under Explosion Based on Flac2D

Based on flac2D,a numerical model of rock single-free-surface slope under explosion is established.And some problems found during the procedure of modeling are discussed,which reveals that the frequency of vibration becomes lower with the increase of the slope height.Peak particle velocity is applied as the judgment standard of slope dynamic response.Then through changing the height and obliquity of the slope,some results are obtained,which confirms that,under dynamic loading,slopes will not only appear magnifying effect,but also with the increase of slope,the velocity first increases and then decreases and the peek velocity increases if the obliquity is constant.