周海孝,高启栋,王亚琼,冷振东,陈明

• 1:长安大学公路学院
• 2:中国葛洲坝集团易普力股份有限公司重庆市民用爆破器材工程技术研究中心
• 3:武汉大学水工岩石力学教育部重点实验室

摘要(Abstract)：

依托老挝南俄1水电站扩机工程爆破开挖,选取已有典型建筑设备,开展爆破振动跟踪监测,基于统计数据对比分析了主爆孔与预裂孔诱发爆破振动的差异;借助光滑粒子流(SPH)数值计算方法,从装药结构、起爆方式及抵抗线大小三个方面,分析了造成主爆孔与预裂孔爆破振动差异的原因。结果表明:预裂孔诱发的爆破振动峰值水平普遍高于主爆孔;装药结构、起爆方式和抵抗线大小均会影响爆破加载特性和爆破近区损伤的演化与分布,进而引起爆炸能量传输与分配的不同;预裂孔一般采用不耦合装药,并通常由导爆索侧向起爆,抵抗线也较大,其炮孔壁上的爆破荷载峰值低于主爆孔,炮孔附近的粉碎区范围和裂纹数量较少,且抵抗线方向上的岩石损伤程度较低,从而消耗于岩石破碎和抛掷的能量占比更小,使得更多的能量转化为振动能,故而预裂爆破诱发的振动水平要高于主爆孔。

关键词(KeyWords)： 水电站扩机;爆破振动;预裂孔;主爆孔;振动特性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52009003、51809016);; 中央高校基本科研业务费专项基金(300102210123);; 水工岩石力学教育部重点实验室开放研究基金(EMHSE1903)

作者(Author): 周海孝,高启栋,王亚琼,冷振东,陈明

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