冲击载荷与渗透水压下裂隙岩体断裂机理研究

项目名称： 冲击载荷与渗透水压下裂隙岩体断裂机理研究

项目编号： No.51504092

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 矿业工程

项目作者： 周志华

作者单位： 湖南科技大学

项目金额： 20万元

中文摘要： 我国大多数矿山进入深部开采,深部岩体受到高地应力、高岩溶水压的作用，爆破施工等人类的采掘活动极易造成裂隙扩展或断层活化，而引起承压溶洞突水事故，造成严重的经济损失和社会危害,是我国采矿和地下工程领域亟待解决的重大课题。为研究地下工程岩体受到爆破等动力扰动后突水的力学行为，开展冲击载荷与渗透水压作用下裂隙岩体破坏的理论研究、试验研究、声发射监测和数值模拟。以研制的渗流-冲击耦合试验装置为平台，进行含裂纹岩石的力学压缩对比试验（包括含裂纹岩石的力学压缩试验、冲击试验和渗流-冲击试验），并采用声发射测试分析系统对其整个过程进行监测，探求在冲击载荷及渗透水压共同作用下岩石内部裂隙扩展规律、破坏模式，建立岩石的本构方程，总结在渗透水压及冲击载荷作用下岩石裂隙的扩展机理和破坏准则，寻求深部岩体突水预测方法。

中文关键词： 断裂；力学特性；组合加载；本构关系；声发射

英文摘要： Most of the mines have entered into the deep mining in our country, the deep rock mass are under high geo-stress and high karst water pressure. Human mining activities such as blasting can easily cause crack extension or fault activation, and cause the karst water inrush accident. Tremendous economic loss and social harm were generated, because of water bursting form confined karst. Thereby, it is an important problem demanding prompt solution for the mining and underground engineering field. To reveal the water inrush mechanics behavior of underground rock mass subjected to dynamic disturbance such as blasting, the crack propagation mechanism of fractured rock under impact load and seepage water pressure will be analyzed through theoretical research, experimental study, acoustic emission monitoring and numerical simulation. The rock containing cracks will be compressed with the impact and seepage coupling test device platform, to conduct the mechanics compression comparison tests, including compression tests, impact tests and seepage - impact tests. The crack rock compression failure process will be monitored by acoustic emission test and analysis system to explore the inside fracture propagation regulation, failure mode, and establish the constitutive equation of the crack rock under impact load and water pressure, and summarize the propagation mechanism and failure criterion, seek water inrush prediction method.

英文关键词： fracture;mechanical characteristics;combined loading;constitutive relation;acoustic emission