不同加载速率下粉砂岩受载破坏过程红外辐射能量变化规律试验研究  

Experimental study on changes of infrared radiation energy in siltstone failure process under different loading rates

作　　者：雷跃宇 李忠辉[1,2,3] 田贺 艾克热木江·艾合麦提 李雪丽 娄全 LEI Yueyu;LI Zhonghui;TIAN He;AIKEREMUJIANG·AIHEMAITI;LI Xueli;LOU Quan(Key Laboratory of Gas and Fire Control for Coal Mines of Ministry of Education,China University of Mining and Technology,Xuzhou 221116,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China;National Engineering Research Center for Coal Gas Control,China University of Mining and Technology,Xuzhou 221116,China;School of Municipal and Environmental Engineering,Henan University of Urban Construction,Pingdingshan 467036,China)

机构地区：[1]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116 [2]中国矿业大学安全工程学院,江苏徐州221116 [3]中国矿业大学煤矿瓦斯治理国家工程研究中心,江苏徐州221116 [4]河南城建学院市政与环境工程学院,河南平顶山467036

出　　处：《煤矿安全》2024年第1期151-159,共9页Safety in Coal Mines

基　　金：国家自然科学基金面上资助项目(52074280);“十四五”国家重点研发计划资助项目(2022YFC3004705);河南省重点研发与推广专项(科技攻关)资助项目(222102320279)。

摘　　要：为研究加载速率对粉砂岩受载破坏过程红外辐射能量的影响,定量分析粉砂岩加载过程红外辐射能量变化规律;开展了不同加载速率下粉砂岩单轴压缩红外辐射实验。研究结果表明:峰值应力随加载速率的增加而减小,不同加载速率下,差值模式下红外辐射温度最大值ΔT_(max)与应力变化具有较好的对应性,更能反映试样的破坏情况,ΔT_(max)的最高温差突增范围为1.0~1.7℃;主破裂时,累计红外辐射能增量ΔQ随时间变化呈缓慢增长趋势,破裂时对应的累计红外辐射能增量随加载速率的增大逐渐减小;ΔQ与机械功之间呈幂函数关系,随着机械功的增加,累计红外辐射能量增量呈现出先增大后缓慢增长趋势;不同加载速率下试样损伤红外前兆比的范围为0.02~0.285,且随加载速率逐渐减小。In order to study the influence of loading rate on infrared radiation energy of siltstone during loading failure,and quantitatively analyze the change law of infrared radiation energy of siltstone during loading process,the infrared radiation experiments of siltstone under uniaxial compression at different loading rates were carried out.The results show that the peak stress decreases with the increase of loading rate.Under different loading rates,in difference mode,the maximum infrared radiation temperatureΔT_(max) has a good correspondence with the stress change,which can better reflect the damage of the sample,and the maximum temperature difference ofΔT_(max) increases by 1.0-1.7℃.During the main rupture,cumulative infrared radiant energy incrementΔQ increases slowly with time.There is a power function relationship betweenΔQ and mechanical work.With the increase of mechanical work,the cumulative infrared radiation energy increment increases first and then increases slowly.The range of infrared precursor ratio of specimen damage under different loading rates is 0.02-0.285,and decreases with the loading rate.

关 键 词：单轴压缩 加载速率 红外辐射能 岩石破坏机制 动力灾害 

分 类 号：TD315[矿业工程—矿井建设]