非固结面裂隙深度对爆破振动影响试验研究

鉴于岩体中存在大量裂隙,为了探索非固结面裂隙对爆破振动效应的影响,通过建立波在裂隙岩体中传播的砂浆模型,对节理裂隙岩体进行模拟试验,研究分析了岩体裂隙深度对应力波传播规律的影响。研究表明：由于非固结面裂隙因素影响,裂隙深度对垂直方向质点峰值的影响较大,质点垂向振动峰值变小,裂隙深度和质点峰值大小不是反线性比例关系;裂隙深度对三个单独方向（垂向、径向和切向）主频率大小的影响并不明显,但其垂向频域分布主要集中在中高频,径向和切向主要集中在低频频域范围内。

Experimental Study on Influence of Unconsolidated Interface Fractured Depth on the Blasting Dynamic

In view of the existence of a large number of cracks in rock mass, in order to explore influence on unconsolidated surface cracks on blasting vibration effect, the mortar model of wave propagation in the fractured rock mass was established, to do simulation test to joint fractured rock mass, and the influence of rock crack depth on stress wave propagation was studied. The results indicated that because of influence of unconsolidated surface fissures, the influence of crack depth on the vertical peak particle is big, and vertical vibration peak gets smaller, the relationship between crack depth and particle peak value is not antilinear proportional. The effect of crack depth on the three separate direction （vertical, radial and tangential） main frequency is not obvious, but its vertical frequency distribution is mainly in the high -frequency, radial and tangential frequency are mainly concentrated in the low -frequent range.