液态CO2气爆破岩振动衰减规律试验研究

Experimental Study on Vibration Attenuation Law of Liquid CO2 Gas Blasting Rock

为研究CO2爆破振动衰减规律,依托青藏高原公路路基改建工程,开展了CO2爆破试验,测试了CO2爆破振动信号,分析了振动速度衰减规律,并与《爆破安全规程》规定的安全允许质点振速进行了对比分析。研究结果表明:CO2爆破振动速度随爆源距增加迅速衰减,振动速度与装药量和距离的比值成指数函数关系。

In order to study the vibration attenuation law of CO2 blasting,the experiment of CO2 blasting was carried out based on the subgrade reconstruction project of Qinghai—Tibet plateau highway,the vibration signal of CO2 blasting was tested,the attenuation law of vibration velocity was analyzed,and the results were compared with the vibration velocity of safety allowed particle specified in the Blasting Safety Regulations.The results show that the vibration velocity of CO2 blasting decays rapidly with the increase of the distance between explosion sources,and the ratio of the vibration velocity to the charge quantity and distance is an exponential function.