未确知测度模型在爆破振动安全预评价中的应用

摘要

根据当前土岩爆破振动危害效应的影响因素众多,而且各影响因素之间的综合作用不确定的特点,通过引入未确知测度模型,建立了土岩爆破振动的安全预评价模型,并结合工程实例,对某土石方开挖工程爆破振动的危害效应进行了基于未确知测度理论的安全预评价.实例分析表明:基于未确知测度的爆破振动安全预评价模型在各评价指标权重和识别准则的确定上,分别采用了信息熵和置信度识别准则,使评价结果更具客观性,将影响爆破振动安全的各影响因素的未确知程度定量化,使评价结果更具客观性,为合理有效地控制爆破振动的危害效应提供了决策依据,也为土岩爆破振动的安全预评价提供了一种新方法.%According to the uncertainty of influencing factors in rock blasting vibration, the uncertainty measurement theory was introduced to build a safety pre-evaluation model of rock blasting vibration, which would be used to pre-evaluate the harmful effects of blasting vibration in rock excavating engineering. Results show that the information entropy and confidence identifying criterion were respectively used to ascertain the evaluation index weight and i-dentifying criterion, by which the unascertainty degree of each factor was quantitative and further cause the evaluation results of this model more objective. The model will help to evaluate and control the harmful effects in the blasting vibration.