桩井爆破振动在边坡的传播规律及预测分析  

Propagation and Predictive Analysis of Pile-well Blasting Vibration in Slope

作　　者：蒲传金[1,2] 廖涛[1,2] 肖定军[1,2] 肖正学[1,2] 

机构地区：[1]西南科技大学环境与资源学院,绵阳621010 [2]非煤矿山安全技术四川省高等学校重点实验室,绵阳621010

出　　处：《爆破》2017年第1期77-84,共8页Blasting

基　　金：四川省教育厅青年基金项目(项目编号:10zd1011)

摘　　要：为研究桩井爆破地震波在邻近边坡传播规律,提高预测精度,对桩井爆破振动速度进行了现场测试。现场测试结果表明:(1)切向平均衰减速率最大,径向其次;(2)爆破地震波在边坡存在坡面效应,且其具有区域性和方向性,在台阶上部边缘以垂向振速放大为主,在台阶坡面以径向振速放大为主;(3)岩土介质性质变化对爆破振动速度影响较大。提出了利用桩井开挖深度H预测K、α值的桩井深度预测公式,对比萨道夫斯基公式、高程修正公式及该预测公式,该式预测精度最高,平均误差为18.4%。To study the propagation of blast seismic wave caused by pile-well blasting on the slope nearby and to improve the prediction accuracy,the test of vibration is carried out in pile-well blasting. The field test results show that the average attenuation rate of tangential is the biggest and rate of the radial came second; the blast seismic wave produces slope effect,where,the amplification of vertical direction velocity is based on the upper edge of the step and radial direction is based on the slope surface; the change of rock media properties makes large effect on blasting vibration velocity. A new method is proposed to forecast the values of K and α by the pile-well excavation depth H,compared with Sadaovsk formula and altitude correction formulas,which improves prediction accuracy with average error 18. 4%.

关 键 词：爆破振动 坡面效应 振动测试 桩井深度 萨道夫斯基公式 高程修正公式 

分 类 号：O382.2[理学—流体力学] U443.158[理学—力学]