节理岩体摩擦律的动力学机制研究

项目名称： 节理岩体摩擦律的动力学机制研究

项目编号： No.11472264

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 徐松林

作者单位： 中国科学技术大学

项目金额： 86万元

中文摘要： 岩体摩擦本构关系的研究是地震孕震及板块滑动研究中的热点问题之一,但目前主要集中于滑动摩擦特性的揭示。本项目申请试图建立测试节理岩体动摩擦全过程中声发射和产热等物理力学特性的实验技术，即基于大口径的Hopkinson压杆（SHPB）试验装置研制多点声发射和多点红外测温系统，从而探索节理岩体从波致（wave-induced）摩擦到惯性摩擦到滑动摩擦这一动摩擦全过程中声频和热等信息的演化规律，由此建立由声频和热信息定量描述岩体粘滑转换的临界状态的方法。在此基础上，研究界面振动特性对摩擦强度的影响。该研究对于地震机制的认识、对于水利工程、矿山工程和隧道工程中的微地震和岩爆研究、对于工程物探等领域有着十分重要的实用意义。

中文关键词： 波动；节理岩体；摩擦律；动力学

英文摘要： Great efforts had been made in the investigation of frictional constitutive relationships of rockmass, which is one of the hot issues in the study of seismogenic and earthquake sliding. However, previous works focused on the investigation of sliding friction of rockmass. This project attempts to bulid a new experimental technique to measure the physical and mechanical properties, i.e.acoustic emission and heat production, of the whole process of dynamic friction for jointed rock mass.That is, based on the large diameter Hopkinson pressure bar (SHPB) device, we will develope a multi-point acoustic emission and multi-point infrared temperature measurement system. It can be used to explore the evolution of acoustic frequencies and thermal raidation of the whole process, which involves in such three stages as the wave-induced frictional stage,the inertial frictional stage and the sliding frictional stage, of dynamic friction of jointed rockmass. And then, establish the quantitative method to describe the relation of the information of acoustic frequencies and thermal radiation to the critical states of rockmass stick-slip behaviors.The effects of interfacial viberating properties of rockmass to dynamic friction strength are further studied on this experimental system. The research is helpful in the comprehensive understanding of the earthquake mechanism, in the study of micro-earthquake and rock burst in hydraulic engineering,tunnel engineering,and mining engineering, and geophysical exploration for engineering and other fields.It has very important practical significance.

英文关键词： wave propagation;jointed rockmass;frictional constitutive relationship;dynamic