刘亮,郑炳旭,陈明,宋锦泉,王高辉,严鹏

• 1:武汉大学水资源与水电工程科学国家重点实验室
• 2:武汉大学水工岩石力学教育部重点实验室
• 3:广东宏大爆破股份有限公司

摘要(Abstract)：

在台阶爆破中,根底率是评价爆破效果的一项重要指标。根据爆前、爆后岩体声波降低率,计算爆后保留岩体的损伤大小,确定临界破碎状态对应的损伤阈值。基于LS-DYNA的二次开发爆破损伤模拟技术,采用拉压损伤模型,对台阶爆破不同起爆点位置的爆破损伤效应进行数值模拟,并重点比较正向起爆和反向起爆条件下,相邻炮孔之间爆破根底的分布情况。模拟结果表明:起爆点位置能够影响能量和应力的分布状态,导致不同的爆破效果,正向起爆对孔底岩体有较好的破碎效果,能够有效地消除爆破根底,提高爆后台阶面的平整度。

关键词(KeyWords)： 爆破根底;起爆方式;数值模拟;爆破损伤

Abstract:

Keywords:

基金项目(Foundation): 国家重点基础研究发展计划(2011CB013501);; 国家自然科学基金面上项目(51279146)

作者(Author): 刘亮,郑炳旭,陈明,宋锦泉,王高辉,严鹏

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