矿岩与胶结充填体异质界面爆破振动传播规律研究

Study on Blasting Vibration Propagation Law of Heterogeneous Interface Between Rock and Cemented Filling Body

为研究异质界面的爆破振动传播规律,结合矿山生产实际,采用模型实验的研究方法对不同强度的胶结充填体进行振动监测。结果表明:在异质界面中,胶结充填体的减震效果会随着其强度的增加而减小,其中强度为3.2 MPa的胶结充填体减震效果最差,减震效果最好的是强度为0.45 MPa的胶结充填体;爆破地震波在向外传播时,其传播方向和路径会发生改变,同时其波形还会相互转换;观察得知,强度为0.45 MPa的胶结充填体反射能力最强,透射能力最弱,而强度为3.2 MPa的胶结充填体反射能力最弱,透射能力最强。

In order to study the blasting vibration propagation law of heterogeneous interface,the vibration monitoring of cemented backfill with different strength was carried out by using the research method of model experiment and combining with the actual production of mine.The results show that in the heterogeneous interface,the damping effect of the cemented backfill decreases with the increase of its strength.The damping effect of the cemented backfill with a strength of 3.2 MPa is the worst,and the best damping effect is the cemented backfill with a strength of 0.45 MPa.When the blasting seismic wave propagates outward,its propagation direction and path will change,and its waveform will be converted to each other.It is observed that the cemented backfill with a strength of 0.45 MPa has the strongest reflection ability and the weakest transmission ability,while the cemented backfill with a strength of 3.2 MPa has the weakest reflection ability and the strongest transmission ability.