围压条件下岩石的冲击力学性能及损伤特性研究

项目名称： 围压条件下岩石的冲击力学性能及损伤特性研究

项目编号： No.51204096

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 冶金与矿业学科

项目作者： 高富强

作者单位： 洛阳理工学院

项目金额： 25万元

中文摘要： 针对地下工程开挖和防护工程防震抗爆应用中存在的岩石冲击破坏问题。本项目拟以围压荷载作用岩石为研究对象，通过自行研制的围压加载装置和轻气炮动力试验系统，研究深部高地应力岩石在冲击荷载作用下的力学性能和损伤特性，并构建与之相应的冲击损伤力学模型。采用理论分析、模型试验和数值模拟相结合的方法，对岩石中应力波的传播与衰减规律、损伤与破坏特性，以及岩石在围压和冲击荷载耦合作用下的应力场和损伤场等进行研究，确定冲击荷载条件下围压作用岩石的力学响应特性和围压对岩石力学性能的影响。对DYNA程序进行二次开发，将建立的冲击损伤力学模型嵌入软件，并结合电镜扫描和超声测试技术，研究冲击荷载条件下围压作用岩石的损伤机理和破坏范围。项目研究成果对于认识深部高地应力岩石的抗冲击能力和动态损伤破坏具有重要意义。

中文关键词： 围压荷载；岩石；冲击加载；力学性能；损伤特性

英文摘要： Impact damage of rock is a major concern in the application of underground engineering excavation and protective engineering earthquake and antiknock. In this project, the mechanical properties and damage characteristics of deep high stress rock under impact load will be studied through self-developed confining pressure loading device and a light gas gun dynamic test system, and the corresponding impact damage mechanics model will be constructed. By the combined method of theoretical analysis, model experiment and numerical simulation, the propagated and attenuated laws of stress wave, damage and failure characteristics of rock, as well as the stress field and damage field in coupling effect of confining pressure and impact load will be researched; the mechanical response characteristics of confining pressure rock subject to impact load and the effect of confining pressure on mechanical properties will be determined. The impact damage model will be embedded in DYNA program on the base of two times development, and the rock damage mechanism and failure range will be studied combined with scanning electron microscope and ultrasonic testing technique finally. The research results have great significance on understanding the impact resistance capability and dynamic damage of deep high stress rock.

英文关键词： confining pressure；rock；impact pressure；mechanical property；damage characteristics