Analysis of Influence of Free Surface and Minimum  Resistance Line on Blasting Vibration

doi:10.3973/j.issn.2096-4498.2018.01.006

Tunnel Construction ›› 2018, Vol. 38 ›› Issue (1): 50-56.DOI: 10.3973/j.issn.2096-4498.2018.01.006

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Analysis of Influence of Free Surface and Minimum  Resistance Line on Blasting Vibration

HE Chuang¹, YIN Dongmei², WANG Hailiang³, YAN Honghao¹

（1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology,  Dalian 116023, Liaoning, China； 2. Civil Engineering Department, School of Architecture and Civil Engineering,  Hebei University of Science and Technology， Shijiazhuang 050000， Hebei， China； 3. Key Laboratory of Mine Disaster  Prevention and Control of Ministrg of Education, Shandong University of Science & Technology, Qingdao 266590, Shandong, China）

Received:2016-06-16 Revised:2017-02-20 Online:2018-01-20 Published:2018-02-01

Abstract

Abstract:

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.

Key words: metro tunnel, wedge cutting, blasting vibration, free surface, minimum resistance line, blasting parameters

CLC Number:

U 455.6

HE Chuang, YIN Dongmei, WANG Hailiang, YAN Honghao. Analysis of Influence of Free Surface and Minimum  Resistance Line on Blasting Vibration[J]. Tunnel Construction, 2018, 38(1): 50-56.

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Analysis of Influence of Free Surface and Minimum  Resistance Line on Blasting Vibration

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