白云鄂博西矿24 m高台阶靠帮预裂爆破技术研究  

Research on slope pre-split blasting technology for a 24 m high step in Baiyun’ebo West Mine

作　　者：徐建超 张波 杨旭 XU Jianchao;ZHANG Bo;YANG Xu(Baotou Emergency Comprehensive Support Center,Baotou 014010,China;Barun Mining Branch,Inner Mongolia Baogang Steel Union Co.,Ltd.,Baotou 014010,China)

机构地区：[1]包头市应急综合保障中心,内蒙古包头014010 [2]内蒙古包钢钢联股份有限公司巴润矿业分公司,内蒙古包头014010

出　　处：《露天采矿技术》2024年第5期68-72,共5页Opencast Mining Technology

摘　　要：为了确定24 m高台阶预裂爆破技术的关键参数,以白云鄂博西矿靠帮高台阶为工程背景,采用ANSYS/LS-DYNA3D软件建立了高台阶预裂爆破模型,确定了预裂炮孔间距,研究了不耦合系数对预裂爆破形成贯通缝的影响,并通过现场试验验证了预裂爆破设计参数的可行性。结果表明:当炮孔间距为1.5 m时,岩体内部可以形成完整的贯通缝,进一步形成完整的预裂面;当不耦合系数K=3.0时,预裂爆破效果较好;采用设计参数的预裂爆破能够在高台阶处实现一次爆破成帮。In order to determine the key parameters for pre-split blasting technology on a 24 m high step,taking Baiyun’ebo West Mine high step as the engineering background,the article adopts ANSYS/LS-DYNA3D software to establish the high step pre-split blasting model,determines the spacing between pre-split blast holes,studies the effect of the decoupling coefficient on the formation of continuous cracks in pre-split blasting and verifies the feasibility of pre-split blasting design parameters through filed experiments.The results show that when the blast hole spacing is 1.5 m,a complete continuous crack can form inside the rock mass,further forming a complete pre-split surface.When the decoupling coefficient K is 3.0,the pre-split blasting effect is better.Pre-split blasting using the designed parameters can form a high step at once.

关 键 词：高台阶 预裂爆破 炮孔间距 不耦合系数 贯通缝 

分 类 号：TD824.2[矿业工程—煤矿开采]