不同超深影响的露天矿台阶爆破根底数值模拟  

Numerical simulation on the influence of different ultra deep on the blasting foundation of open-pit mine steps

作　　者：胡德昊 HU Dehao(Hongshaquan No.1 Open-pit Coal Mine,China Energy Group Xinjiang Energy Company,Changji 831100,China)

机构地区：[1]国家能源集团新疆能源公司红沙泉一号露天煤矿,新疆昌吉831100

出　　处：《露天采矿技术》2024年第5期49-53,共5页Opencast Mining Technology

基　　金：国家自然科学基金青年科学基金项目(51604264)。

摘　　要：为解决露天煤矿爆破所产生的台阶根底问题,提高矿山经济效益、保障正常生产,通过分析现场爆破参数探究爆破根底产生的可能因素,采用ANSYS/LS-DYNA数值模拟软件构建超深深度为1.5、2.0、2.5、3.0 m的4种有限元模型并进行爆破效果分析;探究合理超深深度控制爆破根底。结果表明:随着超深深度的增加损伤效果呈现先增加后减弱的规律;1.5 m超深条件下应力波效果整体弱于其他3种方案,2.0~3.0 m超深方案之间应力效果差距不明显;综合考虑现场成本以及施工因素,采用2 m超深可以在现有基础上有效改善现场台阶爆破根底问题。In order to solve the problem of step foundation caused by open-pit coal mine blasting,improve the economic benefits of the mine,and ensure normal production,the possible factors causing blasting foundation were explored by analyzing on-site blasting parameters.ANSYS/LS-DYNA numerical simulation software was used to construct four finite element models with ultra deep depths of 1.5 m,2.0 m,2.5 m,and 3.0 m,and the blasting effect was analyzed.The reasonable control of blasting foundation for ultra deep depth should be explored.The results show that as the depth increases,the damage effect shows a pattern of first increasing and then weakening.The stress wave effect under the condition of 1.5 m ultra deep is generally weaker than the other three schemes,and there is no significant difference in stress effect between the 2.0~3.0 m ultra deep schemes.Taking into account both on-site costs and construction factors,adopting 2 m ultra depth can effectively improve the foundation problem of on-site step blasting on the existing foundation.

关 键 词：超深 爆破参数 爆破根底 数值模拟 LS-DYNA 

分 类 号：TD824.2[矿业工程—煤矿开采]