张志忠,刘玉山,张雪峰,郝兵元,王晨龙,张涛

• 1:山西华阳集团新能股份有限公司二矿
• 2:太原理工大学
• 3:山西吉昌泰矿山工程技术有限公司

摘要(Abstract)：

复合顶板具有多层不同岩性的分层，各分层厚度、矿物成分、波阻抗以及节理裂隙等存在显著差异，这常常导致预裂切缝孔装药结构与分层的物理力学性质不匹配，易造成硬岩分层无法预裂，软岩分层因过度消耗爆炸能量形成鸡窝状爆坑，预裂切缝难以沿炮孔全长有效贯通。为实现复合顶板均匀预裂，采用LS-DYNA软件分析了装药结构对复合顶板预裂效果的影响，在此基础上提出了复合顶板均散保压预裂爆破技术；通过开展现场试验，结合爆后对爆生裂隙发育情况的窥视评价，验证了该均散保压预裂爆破技术的可行性。研究结果表明：爆生气体由硬岩分层向软岩分层逃逸是造成复合顶板预裂爆炸能量利用不均的主要原因；复合顶板均散保压预裂爆破技术按照复合顶板分层结构将预裂孔分割成多个腔体，各分层具有独立的爆后保压腔体，满足了预裂各分层的爆炸能量需求，避免了炸药能量过度消耗在软岩分层，提高了硬岩分层预裂效果。

关键词(KeyWords)： 复合顶板;均散保压预裂爆破技术;均匀预裂

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金青年项目(12102294)~~

作者(Author): 张志忠,刘玉山,张雪峰,郝兵元,王晨龙,张涛

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