论文部分内容阅读
一概况露天矿采用大直径炮孔爆破,一次使用的炸药量常常达到50～100吨,甚至超过100吨。因此,伴生的爆破地震效应比较强烈。它是否对邻近的构筑物及地下巷道具有威胁?是否也影响边坡的稳定性?为了回答这些问题,必须进行现场观测,并在取得足够的爆破地震加速度和质点速度的观测资料后,确立震动传播方程式。然后,应用此方程式求出所关心区域的最大质点速度,并用此质点速度值与安全判据进行比较,来估量爆破地震对其稳定性的影响,进而指导今后的爆破作业。二爆破震动的观观测(一)观测仪器震动加速度是选用丹麦Bruel和Kzar公司的加速度计(4367型)
A general situation Large-diameter blasthole blasting using open-pit mine, a used explosives often reach 50 to 100 tons, or even more than 100 tons. Therefore, associated blasting seismic effect is relatively strong. Does it threaten neighboring structures and underground tunnels and does it affect slope stability? In order to answer these questions, it is necessary to conduct on-site observations and to establish the propagation of shocks after obtaining sufficient data of blasting seismic acceleration and particle velocity equation. Then, this equation is used to find the maximum particle velocity in the region of interest. The particle velocity value is compared with the safety criterion to estimate the impact of blasting earthquake on its stability, and then guide the future blasting operation. Second blasting vibration observation (A) of the vibration acceleration of the instrument is selected Denmark Bruel and Kzar’s accelerometer (Type 4367)