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自由面与最小抵抗线对爆破振动的影响分析
收稿日期: 2016-06-16
修回日期: 2017-02-20
网络出版日期: 2018-02-01
Analysis of Influence of Free Surface and Minimum Resistance Line on Blasting Vibration
Received date: 2016-06-16
Revised date: 2017-02-20
Online published: 2018-02-01
何闯 , 尹冬梅 , 王海亮 , 闫鸿浩 . 自由面与最小抵抗线对爆破振动的影响分析[J]. 隧道建设, 2018 , 38(1) : 50 -56 . DOI: 10.3973/j.issn.2096-4498.2018.01.006
The vibration velocity of ground surface is monitored during blasting construction of TBM launching adit on right line of Yan′anlu Station on Qingdao Metro Line No. 2 adjacent to buildings; the site coefficient and the attenuation coefficient of different blasting zones of adit top heading are regressed; and the influence of free surface and minimum resistance line on blasting vibration are obtained, according to which the original blasting parameters are optimized. Finally, remarkable economic and technical benefits have been achieved. The results show that: 1) The blasting vibration is affected by free surface and the minimum resistance line. 2) The site coefficient and the attenuation coefficient of the different blasting zones of top heading are different; and those of cutting zones are the largest.
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