【作者】 翟盛锐；

【导师】 何学秋； 聂百胜；

【作者基本信息】 中国矿业大学(北京) ， 安全技术及工程， 2012， 博士

【摘要】 本文通过实验研究了煤岩在瓦斯吸附-解吸过程中的变形特征,基于弹塑性断裂力学内聚单元模型及实验结果理论分析了孔隙瓦斯对煤岩的蚀损机理,通过测定煤岩瓦斯吸附过程中的弹性波波速变化特征对煤岩瓦斯蚀损进行了定量化分析；同时,以型煤及原煤为研究对象开展了煤岩在单轴压缩破坏的力学特性及煤岩电磁辐射实验研究,得到含瓦斯煤岩在不同瓦斯压力条件下的破坏特性及电磁辐射信号特征,分析了孔隙气体对煤岩峰值强度、弹性模量的影响,建立了孔隙瓦斯作用下煤岩单轴压缩破坏本构模型,完善了煤岩电磁辐射力理论,通过数值计算结合实验结果对模型进行了验证；基于以上研究成果,现场开展了煤岩动力灾害电磁辐射监测技术应用研究,掌握了矿井爆破、顶板垮落及冲击矿压等动力过程中的煤岩电磁辐射时频特征。论文研究为含瓦斯煤岩的力学特性及煤岩动力灾害电磁辐射监测技术提供了理论支持,对煤岩动力灾害的预测与防治具有十分重要的现实意义。更多还原

【Abstract】 This paper obtains the deformation character of the coal rock in the process of gas adsorption and desorption by the experimental research, and theoretically analysis the erosion mechanism of the pore gas to the coal rock based on the cohesion unit model in elastic-plastic fracture mechanics and the experimental results. Also quantitatively analysis the corrosion damage of the coal gas through determining the variation character of the wave speed of the elastic wave. In the meantime, experimentally study the mechanical character of the coal rock under the uniaxial compression damage and its electromagnetic radiation using the moulded coal and the raw coal as the study object. The damage character of the coal rock with gas under different gas pressure and the signal character of the electromagnetic radiation has obtained, the effect of the gas to the peak intensity and the elastic modulus has been analysed. And the secant modulus of the coal rock in the uniaxial compression damage under the effect of the pore gas has been establish, the electromagnetism theory of which has also been perfected. What’s more, the model has also been verified through the numerical calculation and the experimental result. Based on the research results aboved, the field test to the monitoring technology of the of the coal dynamic disaster has been conducted, and mastering the feature distribution of the electromagnetic radiation parametric under different condition. The paper research provides theoretical base to the application of the electromagnetic radiation monitoring technology of the coal and gas bursting, and it is also vital important to the prediction and prevention of coal dynamic disaster.更多还原