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受载组合煤岩电磁辐射规律及其应用研究
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摘要
采用实验室研究、理论分析、数值模拟和现场试验相结合的方法,实验研究了受载组合煤岩的电磁辐射规律,阐述了组合煤岩破坏特征及其与电磁辐射信号特征之间的关系。对受载组合煤岩的变形破裂力学过程进行了分析;在此基础上理论研究了一维和三维情况下煤岩的力电耦合规律,推导得到了该模型中参数的确定方法,并结合实验结果对其中的参数进行了计算;现场对成庄矿和大淑村矿掘进工作面进行了电磁辐射日常预测煤与瓦斯突出试验研究;利用现场试验、数值模拟和理论分析对大淑村矿进行了电磁辐射保护范围研究,数值模拟结果和理论分析结果及现场测试结果相一致。论文研究的结果将为进一步应用电磁辐射监测技术预测预报煤与瓦斯突出提供了理论基础和一种新的研究方法。
Based on the laboratory experiment, theoretical analysis and numerical simulation methods, the mechanical characteristics and electromagnetic emission rules during the uniaxial compression of the combined coal-rock are investigated in laboratory and its mechanical property was analyzed in theory; the relation between mechanical characteristics and electromagnetic emission of the combined coal-rock was discussed. The coupled stress-electricity model (CSEM) of coal or rock is established according to the theory of damage mechanic and statistical theory of coal or rock strength. And the measurement method of the model parameters is deduced and attained. Further more, two parameters are accounted with the EME experimental results of coal samples. In excavation roadway of Chengzhuang mine and Dashucun mine the routine forecast of coal and gas outburst is studied by the use of electromagnetic emission monitoring technology. The protecting zone of protecting stratum is studied by the use of field test, numerical simulation and theoretical analysis, and the results of field test are consistent with that of numerical simulation and theoretical analysis in Dashucun mine. Thus, the researching results can provide theoretical basis and a new research approach to electromagnetic emission monitoring technology for the purpose of the application of monitoring electromagnetic emission in the prediction of coal and gas outbursts.
引文
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