刘博,苟永刚,叶明珠,潘懿,拾立振

• 1:长沙矿山研究院有限责任公司
• 2:湖南省矿山地质灾害防治与环境再造工程技术研究中心
• 3:河海大学土木与交通学院
• 4:南通河海大学海洋与近海工程研究院

摘要(Abstract)：

相比常规岩体，高寒区冻融环境下岩体的力学参数及破碎特征均存在显著变化，其矿岩爆破开挖也难以直接应用传统设计参数，开展冻融环境下的爆破工艺参数研究具有重要意义。研究以巨龙铜矿为依托，在分析冻融循环对岩石力学特性影响的基础上，开展了冻融环境下矿岩的单孔和双孔同段爆破漏斗试验，测定了爆破漏斗几何参数和块度分布，采用拟合方法确定了爆破设计的合理参数，并对比分析了该矿山四种不同岩性条件下的爆破漏斗参数变化。结果表明：冻融循环作用下岩体力学特性显著衰减，单轴抗压强度和弹性模量下降幅度可达40.6%、54.0%;不同岩性条件下冻融矿岩的单孔爆破最佳埋深比为0.678～0.789,最佳药包埋深与漏斗半径比值分布在0.875～1.076范围内。针对知不拉矿区炮孔孔径152 mm,矽卡岩孔网参数为4.5 m×3 m,炸药单耗0.56 kg/m~3;凝灰岩孔网参数为5 m×4 m,炸药单耗0.63 kg/m~3;针对巨龙矿区孔径310 mm,凝灰岩爆破孔网参数为7 m×5 m,炸药单耗0.61 kg/m~3;花岗斑岩孔网参数为8 m×5 m,炸药单耗0.64 kg/m~3。

关键词(KeyWords)： 高寒地区;冻融环境;岩体爆破;爆破设计参数;物理力学特性;爆破漏斗试验

Abstract:

Keywords:

基金项目(Foundation): 江苏省青年自科基金（编号BK20220975）;; 南通市基础科学研究＿青年科技人才创新专项（项目编号JC12022097）~~

作者(Author): 刘博,苟永刚,叶明珠,潘懿,拾立振

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