动力扰动下深部高应力巷道围岩分区破裂机理研究

项目名称： 动力扰动下深部高应力巷道围岩分区破裂机理研究

项目编号： No.50874020

项目类型： 面上项目

立项/批准年度： 2009

项目学科： 电工技术

项目作者： 左宇军

作者单位： 大连大学

项目金额： 30万元

中文摘要： 本项目紧紧围绕动力扰动下深部高应力巷道围岩分区破裂机制的科学问题开展研究，旨在探讨动、静载荷条件下分区破裂现象的机制和规律。首先，在中南大学INSTRON电液伺服材料试验机上进行三维动静组合加载试验，再现动力扰动下高应力巷道围岩分区破裂化现象，研究巷道围岩在不同静压下受不同频率和不同幅值动力扰动作用时的力学响应和破坏特征，为动力扰动下深部巷道围岩分区破裂化机制分析提供试验依据；然后利用深部巷道围岩动静载荷耦合作用非线性损伤本构模型，嵌入到岩石破裂过程分析系统中，采用大规模并行计算技术进行动力扰动下高应力巷道围岩分区破裂的数值试验，通过应力场、损伤场、速度与位移场的演化信息来解读动静载荷耦合作用下巷道围岩分区破裂的机制；综合分析分区破裂化物理试验、理论分析和数值模拟结果，提出动力扰动下深部巷道围岩的稳定条件，为深部巷道围岩的支护设计和稳定性评价提供依据。研究成果对深部开采设计及为寻求我国深部开采工程稳定和破碎的新理论和新方法具有重要的指导意义。

中文关键词： 深部开采巷道；分区破裂；动静组合加载；本构关系；并行计算

英文摘要： Scientific issue on mechanism of zonal disintegration of deep roadway surrounding rocks with high stress under dynamic disturbance is studied to discuss the mechanism and rule of phenomenon on zonal disintegration under static and dynamic loading. In this project, phenomenon on zonal disintegration of deep roadway surrounding rocks with high stress under dynamic disturbance is reproduced by way of physical test on the Instron electro hydraulic and servo controlled material testing machine in Central South University, and the characteristiccs and evolvement rules of phenomenon on zonal disintegration of roadway surrounding rocks with high stress under static-dynamic coupling loading including different static stress and dynamic disturbance with different frequency and amplitude are analyzed, and a non-linear damage mechanics model on deep roadway surrounding rocks with high stress under static-dynamic coupling loading is used and combined with code RFPA (Rock Failure Process Analysis), and numerical test on zonal disintegration of deep roadway surrounding rocks with high stress under dynamic disturbance is carried out by using parallel computing technique, and mechanism on zonal disintegration of deep roadway surrounding rocks with high stress under static-dynamic coupling loading is explained by considering the evolvement information such as stress field, damage field, volocity and displacement field; Then stability conditions of zonal disintegration of deep roadway surrounding rocks under dynamic disturbance are summarized by analyzing synthetically the results of physical tests, theory analysis and numerical tests on zonal disintegration, gists on support design and stability evaluation of deep roadway surrounding rocks are provided. Therefore, the study on zonal disintegration has a wide scientific significance and engineering application such as deep mining design and investigation of new theory and new method on stability and fragmentation in deep excavation engineering.

英文关键词： deep roadway; zonal disintegration; static-dynamic coupling loading; constitutive equation; parallel computing