叶海旺,余梦豪,刘聪,陈家涛,周发明,王浩,杨保忠,雷涛

• 1:武汉理工大学资源与环境工程学院
• 2:武汉理工大学关键非金属矿产资源绿色利用教育部重点实验室
• 3:武汉理工大学矿物资源加工与环境湖北省重点实验室
• 4:滁州琅琊山矿业工程技术有限公司

摘要(Abstract)：

为解决某灰岩建筑石料矿山爆破后小粒径矿石难以与土分离而导致矿石回收率低下的问题，首先基于现场实测数据和数值模拟结果，构建爆破块度与岩体动力损伤关联模型，确定不同岩块粒径对应的动力损伤阈值；其次选用不同空气间隔装药段数和孔网参数开展三维裂隙岩体台阶爆破数值模拟试验，以提高0.3～0.9 m矿石粒径产率为目的，兼顾控制大块率，获取最佳爆破参数；最后，在数值模拟结果的基础上，开展现场爆破试验，优化装药结构和孔网参数。结果表明：灰岩爆破块度尺寸与动力损伤值之间存在负指数函数关系，爆破块度尺寸0.3 m和0.9 m所对应的岩体动力损伤阈值分别为0.793和0.286;仅采用空气间隔装药结构可提高0.3～0.9 m粒径占比，但大块率增幅较大；采用空气间隔装药结构、适当缩小孔网参数可显著提升0.3～0.9 m粒径占比，同时大块率几乎不变；其中采用二段空气间隔装药结构、适当缩小孔网参数，爆破效果最优。矿山现场应用结果表明，0.3～0.9 m矿石粒径占比提高了20.09个百分点，大块率基本不变，炸药单耗降低10.29%。

关键词(KeyWords)： 爆破块度;岩体损伤;空气间隔装药;裂隙岩体;数值模拟

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2020YFC1909602);; 湖北省重点研发计划项目(2021BCA152)~~

作者(Author): 叶海旺,余梦豪,刘聪,陈家涛,周发明,王浩,杨保忠,雷涛

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