顶板岩石受压破坏过程中声电热效应研究  

Experimental study of acoustic-electric and thermal infrared characteristics of roof rock failure

作　　者：李忠辉[1,2] 娄全 王恩元[2] 孔彪[2] 钮月 李国爱[2] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116 [2]中国矿业大学安全工程学院煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116

出　　处：《中国矿业大学学报》2016年第6期1098-1103,共6页Journal of China University of Mining & Technology

基　　金：国家"十二五"科技支撑计划项目(2012BAK09B01;2012BAK04B07);全国博士学位论文专项资金项目(201055);中国矿业大学煤炭资源与安全开采国家重点实验室自主研究课题项目(SKLCRSM15X03);江苏省333高层次人才培养工程

摘　　要：利用煤岩破坏声电热效应多参量实验系统,测试研究了岩样变形破坏过程中声发射、表面电位和红外辐射的变化规律及特征.结果表明：岩样破坏的红外辐射异常信号出现在温度曲线的极大值或极小值点,并且和声电异常信号有一定的对应关系,但不完全同步.岩样受载过程中红外辐射温度曲线呈现典型的降转升型;试样破坏时,岩样平均红外辐射温度增量为0.1～0.3℃,最高红外辐射温度增量为1.07～2.09℃;由声发射、表面电位和红外辐射测试结果反映出的试样损伤前兆点对应的载荷比范围分别为23.0%～52.6%,26.8%～56.2%和36.9%～49.2%,反映出的临界前兆点对应的载荷比范围分别为73.5%～88.7%,77.0%～94.8%和73.6%～95.8%.Using the multi-parameter test system of acoustic-electric and thermal infrared radiation（TIR）effect of rock failure,the acoustic emission（AE）,electric potential and TIR were tested in the deformation and failure of rock sample,and their change rules and characteristics were studied.The results show that TIR abnormal signal appears at the maximum or minimum point of TIR temperature curves,which have a certain corresponding relationship with acoustic-electric abnormal signal,but not synchronous exactly.TIR temperature curve presents decreasing firstly and then increasing,and the increment of average and maximum TIR temperature of roof rock samples are respectively 0.1～0.3℃and 1.07～2.09℃ when samples failure occurred.The corresponding load ratios of damage precursory points of rock samples reflected by the AE,electric potential and TIR is respectively 23.0% ～52.6%,26.8% ～56.2% and36.9% ～49.2%,and the load ratios of critical precursory points is respectively 73.5% ～88.7%,77.0%～94.8% and 73.6%～95.8%.

关 键 词：顶板岩石 破裂 声发射 表面电位 红外辐射 

分 类 号：TD326[矿业工程—矿井建设]