矿井底板突水过程声电变化特征实验研究

发布时间：2019-04-01 08:19

【摘要】：搭建了矿井突水相似模拟实验系统,研究了矿井突水演化过程中电磁辐射、声发射和表面电位信号变化特征。研究结果表明,矿井突水过程中岩层电磁辐射、声发射和表面电位信号基本呈现初期平稳、中期波动较大、后期快速减小的变化趋势;3种信号均与底板岩层的破裂成正相关关系,可反映矿井突水过程煤岩内部破裂情况;3种信号的快速增大可作为岩层发生破裂的前兆,而电磁辐射信号增大后突然减小可作为突水即将发生的征兆。
[Abstract]:The similar simulation experiment system of mine water inrush is built, and the characteristics of electromagnetic radiation, acoustic emission and surface potential signal in the process of mine water inrush evolution are studied. The results show that the electromagnetic radiation, acoustic emission and surface potential signals in the process of mine water inrush are basically stable in the initial stage, fluctuate greatly in the middle period, and decrease rapidly in the later stage. All of the three signals are positively correlated with the fracture of floor rock, which can reflect the internal fracture of coal and rock during the process of water inrush in mine. The rapid increase of three kinds of signals can be regarded as the precursor of rock burst, while the sudden decrease of electromagnetic radiation signal can be regarded as a sign of the imminent occurrence of water inrush after the increase of electromagnetic radiation signal.
【作者单位】：中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室;中国矿业大学安全工程学院;
【基金】：国家自然科学基金资助项目(51104156) “十二五”国家科技支撑计划资助项目(2012BAK04B07) 教育部科学技术研究资助项目(113031A) 江苏省高等学校大学生创新训练计划资助项目(201510290031)
【分类号】：TD745.2

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