鲁臣,赵凯轩,王俊青,贺五一,高晶,张锦华

• 1:中国非金属材料南京矿山工程有限公司
• 2:南京航空航天大学土木与机场工程系
• 3:江西荣达爆破新技术开发有限公司

摘要(Abstract)：

针对邓家山灰岩矿区复杂节理发育条件下爆堆块度分布不均、影响后续加工效率与成本的问题，通过量化分析关键爆破参数对块度均匀性的影响规律，为精细化爆破参数优化提供依据。采用正交试验设计方法，选取孔网参数、延期时间、超深及装药间隔4个因素进行现场爆破试验，并以8 cm、3 cm、0.5 cm筛下累积率作为块度分布评价指标。试验结果表明:装药间隔通过形成空气缓冲层，有效调节爆炸应力波分布与能量传递效率，显著降低8 cm筛下累积率，主导大块率控制;孔网参数直接影响能量密度分布，较小规格孔网能获得更细的块度，而过大孔网易导致大块增多;延期时间通过精确控制爆破时序影响应力波叠加效果，短排间延时显著降低8 cm筛下率，并主导中、细颗粒的调控;超深在2.5～2.8 m范围内增加有助于减少根底，但超过此范围且孔网过大时效果减弱。极差与方差分析进一步量化了各因素的影响程度:装药间隔与孔网参数是控制粗颗粒的关键因素，延期时间对中、细颗粒调控起决定性作用。最终确定最优参数组合为孔网参数6.0 m×3.5 m、孔间延时20 ms排间延时33 ms、超深2.8 m、装药间隔2.0 m。该研究量化了邓家山灰岩关键爆破参数对爆堆块度的影响规律，有效解决了块度分布不均问题，提升了后续加工效率并降低了加工成本。

关键词(KeyWords)： 灰岩爆破;正交试验;块度分布规律;爆破参数

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(52178190)强动载下混凝土高压状态方程及细观破坏机理~~

作者(Author): 鲁臣,赵凯轩,王俊青,贺五一,高晶,张锦华

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