受载复合煤岩体破裂电磁辐射机理及力电热耦合模型研究

项目名称： 受载复合煤岩体破裂电磁辐射机理及力电热耦合模型研究

项目编号： No.51204087

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： 杨桢

作者单位： 辽宁工程技术大学

项目金额： 25万元

中文摘要： 电磁辐射预测作为一种地球物理探测技术，可以实现非接触式连续动态预测。通过研究复合煤岩力学、电学、热力学等物理特性及不同围压、不同倾角复合煤岩在单轴、三轴压缩时加载变形破裂过程中电磁辐射的影响因素及电磁辐射效应与受载煤岩体变形破裂过程的关系，建立先进的电磁辐射信号采集实验系统和数据处理分析系统，深入研究了复合煤岩受载变形破裂产生电磁辐射的机理，并建立精确数学模型。在损伤力学、岩石力学、统计理论和热力学基础上建立三维煤岩力电热耦合模型，经过推导得到力电热耦合模型中参数的计算方法，并利用煤岩变形破裂电磁辐射实验结果对参数进行计算、验证。采用谱分析技术对煤岩电磁辐射信号进行了采样，采用小波理论研究其信号特征和变化规律。课题的研究对于完善煤岩电磁辐射基础理论体系，进一步深入揭示煤岩动力灾害演化机理具有非常重要的理论意义和实际应用价值。

中文关键词： 电磁辐射；复合煤岩；变形破裂；力电热耦合模型；变化规律

英文摘要： As a geophysical probe technology，electromagnetic emission predicting enables non-contact continuous dynamic forecast.By studing the physical properties of coal and rock mechanics,elecreical and thermodynamics,the electromagnetic radiation influencing factors of combined coal of different inclined angles and confining pressu and rock deformation and fracture process in uniaxial and triaxial compression loading and the relationship of electromagnetic radiation effect and the deformation and fracture of load of coal and rock. Advanced electromagnetic emission signal acquisition experiment system and data processing and analysis system are designed to study electromagnetic emission mechanism of loading combined coal-rock fracture and establish the accurate mathematical model.Three dimensional stress-electricity-thermal coupled model is established based on damage mechanics, rock mechanics, statistical theory and thermodynamics. The calculation method of stress-electricity-thermal is received. Parameters are calculated and verified by using the experimental results of coal and rock deformation and fracture of electromagnetic emission. Electromagnetic emission signal is sampled by using spectral analysis technique, signal characteristics and variation are discussed by using wavelet theory. For improving electromagn

英文关键词： electromagnetic emission；composite coal-rock；deformation and fracture；stress-electricity-thermal coupled model；variation