高压水射流作用下煤岩细观动力损伤演化机理研究

项目名称： 高压水射流作用下煤岩细观动力损伤演化机理研究

项目编号： No.51274259

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 司鹄

作者单位： 重庆大学

项目金额： 76万元

中文摘要： 煤岩损伤动力演化机理是研究高压水射流破岩的关键科学问题。本课题研究高压水射流作用下煤岩细观动力损伤演化机理，其研究主要内容包括：通过室内高压水射流试验，研究煤岩细观动力响应特性，分析高压水射流冲击煤岩形成的应力波传播特性，建立基于细观层次高压水射流冲击煤岩形成的应力波与地应力耦合作用的分析计算模型，揭示水射流冲击煤岩应力波动响应机理；研究高压水射流冲击下和多场动力耦合作用下煤岩细观损伤机理，分析煤岩细观动力损伤特征及其参数表征模式；研究水射流压力、射流直径等射流参数对煤岩裂隙场、渗透率的影响规律的数值仿真方法，量化射流参数对煤岩裂隙场特性参数、渗透率等物理量的影响规律；研究射流参数变化对煤岩动力响应的影响规律，提出射流参数优化方法。研究成果将为水射流破岩机理提供理论基础,也为高压水射流技术在瓦斯灾害治理应用中提供理论依据。

中文关键词： 高压水射流；煤岩；应力波；损伤；数值模拟

英文摘要： The mechanism of damage dynamic evolution of coal rock is a key science problem to study water jet breaking coal rock. The project focus on meso-damage mechanism of coal rock under high pressure water jet, which mainly studies the respond meso-dynamic characteristics of coal rock with high pressure water jet, and establishes a calculation model for analysis of coupling effects of stress waves in coal rock under high pressure water jet and geostress, to reveal the mechanical mechanism of water jet breaking coal rock. Furthermore, the project researches damage evolution characteristics of coal rock under high pressure water jet, and developes the dynamic damage theory and characteriz model of parameters for damage characteristics, to reveal the damage mechanism of coal rock under high pressure water jet. The project studies the numerical simulation method on influences of water jet pressure, diameters and other relative parameters on fracture field and permeability of coal rock and the representation method of characteristic parameters, and qualifies the relationships between water jet parameters and fracture field characteristic parameters, permeability of coal rock and other physical quantities. Finally, the optimization method of water jet parameters and the parameter optimization dynamic effect are studied. Th

英文关键词： High Pressure Water Jet；Coal Rock；Stress Wave；Damage；Numerical Simulation