李欣然,张昌锁,谢炜,张胜利,闫鹏,裴富国,高山森

• 1:太原理工大学矿业工程学院
• 2:太原理工大学原位改性采矿教育部重点实验室
• 3:山西昔榆高速公路有限公司

摘要(Abstract)：

本研究针对隧道光面爆破中常规聚能爆破方法存在装药集中度大、装药施工困难以及底部集中装药易引起超挖和围岩损伤等问题，设计了一种PVC半管扣合结构的新型聚能管。在初步验证其效果的基础上，进一步提出针对软弱破碎围岩的可重复使用钢制切缝聚能管。通过数值模拟对比PVC聚能管与钢制切缝聚能管的聚能效应，发现钢制切缝聚能管不论是切缝处的峰值应力还是形成的裂纹长度，都明显大于PVC聚能管，钢制切缝聚能管在切缝方向与非切缝方向的峰值压力比值为5.51，远大于PVC聚能管的比值1.65，体现了更强的聚能效果与保护效果;在双孔爆破中，钢制切缝聚能管线装药密度为113 g/m即可达到PVC聚能管314 g/m的爆破效果，表现出更优的定向断裂能力和对破碎软弱围岩的保护效果。在节理裂隙较发育的隧道围岩中进行爆破试验结果表明，PVC聚能管可实现炸药在炮孔中的均匀分散与能量定向释放，提高半孔率，减小对保留围岩损伤。通过对有无钢制切缝聚能管的爆破试验前后的对比，验证了其聚能效果与可重复使用性。研究表明:所提出的钢制切缝聚能管更适用于软弱破碎围岩爆破工程，能够在低药量条件下有效控制爆破扰动，具有较好的工程应用与推广价值。

关键词(KeyWords)： 光面爆破;破碎围岩;聚能切缝爆破;钢制切缝聚能管;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(52374134);; 山西省自然科学基金资助项目(202203021221082)~~

作者(Author): 李欣然,张昌锁,谢炜,张胜利,闫鹏,裴富国,高山森

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