软煤与硬煤加载过程中声发射差异性及峭度特征

发布时间：2018-05-24 03:02

本文选题：岩石力学 + 软煤　；参考：《煤矿安全》2016年11期

【摘要】：探究软煤与硬煤声发射特征的差异性,对于准确进行地质灾害预测具有重要意义。在不同矿区有针对性的采集煤样以后,利用RMT-150B型岩石力学实验系统以及CDAE-1全数字化声发射监测与分析系统,对煤样加载过程中的应力-应变、声发射特征进行测试与分析,对其峭度特征进行了评价。测试结果显示:在声发射特征方面,软煤与硬煤相比,其连续性声发射产生时间较早,声发射值较小,并且声发射峰值的突变性不明显;在峭度特征方面,软煤的声发射峭度值整体较大。并且在峰值破坏前,声发射峭度值存在1个相对稳定期的特征可以作为煤样破坏的前兆,可以为地质灾害的监测、预测提供指导。
[Abstract]:It is of great significance to explore the differences of acoustic emission characteristics between soft coal and hard coal for accurate prediction of geological hazards. After collecting coal samples from different mining areas, the stress-strain and acoustic emission characteristics of coal samples during loading are tested and analyzed by using RMT-150B rock mechanics experimental system and CDAE-1 full-digital acoustic emission monitoring and analysis system. The kurtosis characteristics were evaluated. The test results show that, compared with hard coal, the continuous acoustic emission of soft coal is earlier, the acoustic emission value is smaller, and the mutation of acoustic emission peak is not obvious. The acoustic emission kurtosis of soft coal is larger as a whole. Before the peak value is destroyed, the feature of a relatively stable period of acoustic emission kurtosis can be used as a precursor of coal sample failure, which can provide guidance for monitoring and prediction of geological hazards.
【作者单位】：河南省瓦斯地质与瓦斯治理省部共建国家重点实验室培育基地;河南理工大学安全科学与工程学院;煤炭安全生产河南省协同创新中心;
【基金】：国家自然科学基金资助项目(51574112,51404100) 河南省科技创新杰出青年基金资助项目(164100510013)
【分类号】：TD315

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