城市岩体爆破方案优选的熵模糊物元决策模型

Fuzzy Matter-element Model based on Coefficients of Entropy in Scheme Optimization of Rock Blasting in Urban Area

针对城市岩体爆破方案综合评价中各指标的不相容性,从破岩效果和环境因素2个角度出发,选用根底率、价格比、耗时比、振速、声压、声持续等指标,将信息熵理论与模糊物元理论相结合,建立了基于熵权的城市岩体爆破方案优选的模糊物元评价模型。利用该模型对重庆市区中某商业城平基工程岩石爆破方案进行评价,以待选方案与最优方案间的海明贴近度来决策综合效益最优的方案,并与模糊综合评判法的评价结果进行比较。研究结果表明:该模型引用信息熵所反映数据本身的效用值来计算指标的权重系数,有效地避免了权重分配困难的问题,并可得出评价样本与评价标准之间的远近关系,与实际情况相符,进而为城市岩体爆破方案综合评价提供了一种新思路。

Focusing on the imcomplitable with each factors of comprehensive evaluation of blasting scheme in urban district, the fuzzy matter-element model of optimizing the rock blasting scheme was established from the blasting results and the environment factor with six index of toe rock rate, price ratio, time consuming ratio, vibration velocity, sound pressure and sound duration. The rock foundation blasting scheme of one commercial building in Chongqing city was evaluated by using this model. The optimalizing scheme of comprehensive benefits which determined by calculating the Simdilar appoach degree between the proposed scheme and the most optimation scheme was compared with the result of fuzzy comprehensive evaluation. The results show that the method of calculating the weighting coefficient in this model can efficiently avoid the question of weight distribution and also takes the relation of evalution sample to evaluation standard. It is a new way to evaluate the rock blasting scheme.