A new type of dry ice powder expansion green construction technology for rock-breaking in tunnels is proposed.Field tests are carried out in open-cut tunnels,and vibration and noise data during rock-breaking are measured at the same time.The test results show that:the maximum vibration velocity of dry ice powder thermal shock rock breaking is attenuated to about 50 mm/s at the vibration source distance of 3.91 m,which meets the requirements of safe particle vibration velocity;the noise is only 80 dB at the vibration source distance of 3.91 m,which has a relatively small impact on the surrounding envi-ronment;the frequency of vibration energy is mainly 1～120 Hz.Dry ice powder expansion rock breaking is a new type of green rock breaking technology,which with broad application prospects in tunnel excavation projects.
关键词
干冰粉膨胀破岩/振动测量/快速傅里叶变换/明挖隧道
Key words
dry ice powder expansion rock breaking/vibration measurement/fast Fourier transform/open-cut tunnel
维普
万方数据