石硕龙,周冲,高文学,李卓,张小军

• 1:北京工业大学
• 2:中交路桥建设有限公司

摘要(Abstract)：

为了实现隧道掘进光面爆破效果的精准控制，利用LS-DYNA流固耦合算法和三项式点火增长状态方程，建立了聚能射流冲击引爆炸药模型，进行了轴向聚能装药结构中乳化炸药合理殉爆距离研究，并基于承平高速(北京段)红石门隧道爆破开挖工程，开展了轴向聚能装药结构现场试验。研究结果表明：1)采用工业上常用的轴向聚能装药结构时，在主装药起爆110μs后，聚能射流头部运动了约25 cm,此时射流与杵体分离，之后，聚能射流会在运动中被拉断成不连续的多节，从而不利于被发装药的引爆，因此，选择合理的炸药间隔，对聚能射流能否引爆被发装药至关重要；2)基于射流头部压力和炸药反应度分析，当炸药间隔超过50 cm后，射流冲击被发装药时的冲击压力小于乳化炸药的临界起爆压力。随着炸药间隔的增大，被发装药被引爆时，射流侵彻炸药的距离也逐渐增加，当炸药间隔超过90 cm后，射流不能引爆被发炸药；3)基于承平高速(北京段)隧道爆破工程，进行了炸药间隔为50 cm和70 cm的两组试验，试验结果显示炸药间隔为70 cm时超欠挖控制更好，所以，在本项工程的条件下，合理的殉爆距离为70 cm。

关键词(KeyWords)： 隧道掘进;光面爆破;聚能装药;冲击起爆;殉爆距离

Abstract:

Keywords:

基金项目(Foundation): 爆破工程湖北省重点实验室开放基金(项目编号BL2021-23)~~

作者(Author): 石硕龙,周冲,高文学,李卓,张小军

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