复杂环境下爆破降振的微差时间优选  

Delayed Time Optimization of Blasting Vibration Reduction in Complex Environment

作　　者：林飞 LIN Fei(CCTEG Huaibei Blasting Technology and Engineering Institute Co.,Ltd.,Huaibei 235000,China;School of Resoures and Safety Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]中煤科工集团淮北爆破技术研究院有限公司,安徽淮北235000 [2]重庆大学资源与安全学院,重庆400044

出　　处：《金属矿山》2021年第4期59-63,共5页Metal Mine

基　　金：中煤科工集团科技创新创业资金专项重点项目(编号:2019-TD-ZD010)。

摘　　要：为了控制爆破振动强度,降低爆破振动对建筑物的危害,基于数码电子雷管对爆破网路孔、排间采用(17 ms、75 ms)、(22 ms、75 ms)、(27 ms、75 ms)、(32 ms、75 ms)的微差时间进行控制爆破对比试验。试验结果表明,孔、排间采用(17 ms、75 ms)的微差时间达到良好的降振效果,在爆心距41 m处,最大降振比例达到54.13%;实测的爆破振动数据可以依据萨道夫斯基经验公式建立爆破地震波质点振动速度的回归预测模型,模型参数K为148.509 3~274.053 2,α为1.568 5~1.865 6。In order to control the intensity of blasting vibration and reduce the damage of blasting vibration to build⁃ings.Based on the digital electronic detonator,the controlled blasting comparison test was carried out on the delayed time of blasting network holes and rows using(17 ms,75 ms),(22 ms,75 ms),(27 ms,75 ms),(32 ms,75 ms).The test re⁃sults show that the slight delayed time between the holes and rows(17 ms,75 ms)can achieve good vibration reduction ef⁃fect,and the maximum vibration reduction ratio can reach 54.13%at the detonation center distance of 41 m.The measured blasting vibration data can be used to establish a regression prediction model for the vibration velocity of blasting seismic wave particle based on Sadolsky′s empirical formula.The model parameter K is 148.5093~274.0532,and the parameterαis 1.5685~1.8656.

关 键 词：爆破振动 数码电子雷管 降振 微差时间 

分 类 号：TD235[矿业工程—矿井建设]