At last, the mechanism of blasting-dust control by prewetting demolished buildings is analyzed, that is, liquid-bridging指出水预湿被爆体降尘法的机理是:尘粒间的液桥力促使润湿尘流中的尘拉变大,变大的尘杜迅速下降,从而实现降低爆尘目的。