摘要
针对浅地表双源微差爆破问题提出了一种实验研究方法。对地面垂直方向上的振动速度进行了测试 ,给出了微差延迟时间为 2 0、40、6 0和 80ms时距离爆破中心 10、2 0和 40m处的测试结果 ,并进行了相应的理论分析 ,得到了地面垂直方向振动速度和功率谱的分布规律。研究结果表明 ,用微差的方法降低地面振动强度存在着最佳值。
An experimental method, by which the vertical component of ground vibration velocity from a millisecond blasting with two sources near to the ground surface can be measured, is suggested. The measured results at measuring points apart 10, 20 and 40m from the blasting centre are given when the delayed time is 20, 40, 60 and 80ms. Through theoretical analysis, the distribution rules of vibration velocities in vertical direction and their power spectra are obtained. The experimental results show that the optimal delayed time exists when the millisecond blasting is used for reducing blasting seismic strength.
出处
《工程爆破》
2000年第4期1-5,共5页
Engineering Blasting
基金
国家自然科学基金!资助项目 (项目批准号 :19972 0 13
5 99740 19)
关键词
微差爆破
地面振动
爆破地震效应
随机振动
Millisecond blasting
Ground vibration
Blasting seismic effect
Random vibrat0
