基于改进的损伤本构模型中深部难动用铁矿回采累积损伤规律研究

发布时间：2018-06-21 08:45

本文选题：工程力学 + 采矿工程　；参考：《兵工学报》2017年S1期

【摘要】：随着难动用矿产资源爆破回采的不断进行,爆炸荷载的多次重复作用会引起采空区矿柱和围岩的累积损伤。基于爆炸荷载作用会导致岩石性质劣化的特点,结合岩石爆破中的高应变率效应和岩石损伤理论,建立改进的损伤本构模型。采用Fortran语言嵌入动力有限元分析软件中,建立模型通过与已有理论和现场实测数据进行对比,验证本构模型以及程序的适用性。最后以程潮铁矿西区保安矿柱爆破回采工程为背景,得到中深部采空区中多次爆破作用下中远区和爆破近区岩体累积损伤的规律,分析得出了较佳的回采顺序,并探讨了动静力组合作用诱发围岩累积损伤规律。
[Abstract]:With the development of mining by blasting, repeated action of explosion load will cause cumulative damage of pillar and surrounding rock in goaf. An improved damage constitutive model is established based on the high strain rate effect in rock blasting and rock damage theory based on the characteristics that explosive load can lead to the deterioration of rock properties. Fortran language is used to embed the dynamic finite element analysis software and the model is established to verify the applicability of the constitutive model and the program by comparing with the existing theory and the field measured data. Finally, based on the mining project of Baoan pillar blasting in the west of Chengchao Iron Mine, the law of rock mass cumulative damage in the middle and deep goaf under the action of multiple blasting is obtained, and the better mining sequence is obtained. The cumulative damage law of surrounding rock induced by the combination of static and dynamic forces is discussed.
【作者单位】：武汉理工大学道路桥梁与结构工程重点实验室;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(2015CFA136) 国家自然科学基金项目(51378500);国家自然科学基金面上项目(51274157)
【分类号】：TD861.1

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