高应变率下难动用铁矿爆破回采损伤规律研究
发布时间：2018-10-24 21:07
【摘要】：随着资源的不断减少,难动用资源的开发利用愈显重要。以程潮铁矿西区保安矿柱爆破回采工程为背景,考虑到爆破过程中高应变率会导致材料的动力硬化行为以及爆破作用引起的岩体损伤,建立了自定义动态损伤本构模型。并通过二次开发将其嵌入LS-DYNA中,通过与程潮铁矿西区爆破回采实例验证自定义本构模型的正确性。最后基于改进损伤本构模型进一步深入分析,得到较为合适的回采方式和回采顺序,并研究了采场岩体的损伤特性,研究成果可为实际施工提供指导。
[Abstract]:With the decrease of resources, the development and utilization of hard-to-use resources become more and more important. A self-defined dynamic damage constitutive model was established based on the blasting stoping project of Baoan pillar in the west of Chengchao Iron Mine. Considering that the high strain rate would lead to the dynamic hardening behavior of materials and the rock mass damage caused by blasting, a self-defined dynamic damage constitutive model was established. It is embedded in LS-DYNA through secondary development, and the correctness of the self-defined constitutive model is verified by an example of blasting mining in the western part of Chengchao Iron Mine. Finally, based on the improved damage constitutive model, a more suitable mining method and mining sequence are obtained, and the damage characteristics of stope rock mass are studied. The research results can provide guidance for practical construction.
【作者单位】： 道路桥梁与结构工程湖北省重点实验室;武汉理工大学土木工程与建筑学院;武汉地产开发投资集团有限公司;武汉钢铁集团开圣科技有限责任公司;
【基金】：湖北省自然科学基金重点项目(编号:2015CFA136) 国家自然科学基金项目(编号:51378500);国家自然科学基金面上项目(编号:51274157)
【分类号】：TD853.391;TD861.1
本文编号：2292557
[Abstract]:With the decrease of resources, the development and utilization of hard-to-use resources become more and more important. A self-defined dynamic damage constitutive model was established based on the blasting stoping project of Baoan pillar in the west of Chengchao Iron Mine. Considering that the high strain rate would lead to the dynamic hardening behavior of materials and the rock mass damage caused by blasting, a self-defined dynamic damage constitutive model was established. It is embedded in LS-DYNA through secondary development, and the correctness of the self-defined constitutive model is verified by an example of blasting mining in the western part of Chengchao Iron Mine. Finally, based on the improved damage constitutive model, a more suitable mining method and mining sequence are obtained, and the damage characteristics of stope rock mass are studied. The research results can provide guidance for practical construction.
【作者单位】： 道路桥梁与结构工程湖北省重点实验室;武汉理工大学土木工程与建筑学院;武汉地产开发投资集团有限公司;武汉钢铁集团开圣科技有限责任公司;
【基金】：湖北省自然科学基金重点项目(编号:2015CFA136) 国家自然科学基金项目(编号:51378500);国家自然科学基金面上项目(编号:51274157)
【分类号】：TD853.391;TD861.1
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