隧道爆破近区爆破振动测试研究

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Abstract When a tunnel is constructed by blasting，the stability of surrounding rock near tunnel face is important for safety of builders and tunnel itself. It is testified that the blasting vibration rule obtained from area remote blasting source is not suitable for the area near tunnel blasting source. So it is necessary to test blasting vibration of the surrounding rock near tunnel blasting source and to study the blasting vibration rule. Based on Qipanshan tunnel of Guiyang—Guangzhou railway，the tailor-made blasting vibration sensors are disposed in the arch crown surrounding rock within the range of 5 m to test the blasting vibration velocity. Taking advantage of middle drift excavation，the tailor-made blasting vibration sensors are disposed in upper and side surrounding rocks within the range of 2 m to test blasting vibration velocity. The blasting vibration rules of arch crown and upper and side surrounding rocks behind tunnel face are studied. The study results can provide references for tunnel blasting construction.

Key words： tunnel engineering blasting test vibration rule area near blasting source

Received: 24 August 2010

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https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I2/335

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