煤样变形破坏声电效应的演化规律及机理研究  

Study on regularity and mechanism of acoustic emission and electromagnetic emission during fracture process of coal samples

作　　者：王云海[1] 何学秋[2] 窦林名[2] 

机构地区：[1]中国安全生产科学研究院矿山安全技术研究所,北京100029 [2]中国矿业大学能源与安全工程学院,徐州221008

出　　处：《地球物理学报》2007年第5期1569-1575,共7页Chinese Journal of Geophysics

基　　金：国家杰出青年基金(59925411);国家自然科学基金项目(50134040;50204010)联合资助

摘　　要：通过实验研究不同煤样变形破坏全过程的声发射和电磁辐射效应的演化规律,分析了煤样变形破坏过程中电磁辐射和声发射信号的相关性和煤样变形破坏的微观机理,提出了煤样变形破坏过程中电磁辐射和声发射信号分别是在煤样内的裂纹面滑移和裂纹扩展时产生的观点,较好地解释了煤样变形破坏过程中声电效应的变化规律和特征,为进一步提高电磁辐射及声发射、电磁辐射综合预测煤岩动力灾害的可靠性和准确性提供了理论基础.In this paper, the characteristics of acoustic emission and electromagnetic emission activity are studied by experiments during the fracture process of different coal samples. Based on the experiment results and the theoretical analysis of microcosmic mechanism of coal fracture, it is considered that the sliding friction between the cracks is the main mechanism of electromagnetic emission during the coal fracture, and the acoustic emission is produced while the cracks expanding, which interpret well the characteristics of acoustic emission and electromagnetic emission activity during the fracture process, and will improve the reliability and accuracy of dynamical disasters forecasting of coal or rock with electromagnetic emission techniques or synthetical methods （acoustic emission, electromagnetic emission）.

关 键 词：煤样变形破坏 电磁辐射 声发射 

分 类 号：P631[天文地球—地质矿产勘探]