【摘要】 基于大型地下洞室开挖中,采用装药量较大的梯段爆破,本文探索了爆破振动传播规律及其引起的爆破振动效应;依据回归结果对爆破允许药量进行了核算,对峰值振速进行了预报,并对振动衰减规律进行了分析;引入数理统计中的置信概率,对回归分析的数据进行了可靠度的讨论,并对质点振动的主频分布进行了分析。更多还原

【Abstract】 Based on the fact that large quantity of explosive is needed in excavation of large underground tunnel by bench blasting,the paper explored the propagation regulation of blasting vibration and the resulting vibration effect,and with the regression analysis result,checked the allowed explosive charge for one blasting operation,analyzed the attenuation formula and predicted the peak particle velocity(PPV).Moreover ,the paper introduced believing probability of symbolic statistic into trustiness discussion and also analyzed the distribution of principal frequency for the particle vibration.更多还原