砂岩裂纹发育过程的温度场变化特征  

Characteristics of temperature field variation during sandstone crack development

作　　者：田丰 孙海 马立强 韩杰[1] 陈咪咪 杜园园 付煜 王飞 TIAN Feng;SUN Hai;MA Liqiang;HAN Jie;CHEN Mimi;DU Yuanyuan;FU Yu;WANG Fei(Liaoning Key Laboratory of Petrochemical Special Building Materials,School of Civil Engineering,Liaoning Petrochemical University,Fushun 113001,China;Key Laboratory of Deep Coal Resource Mining,Ministry of Education of China,School of Mines,China University of Mining and Technology,Xuzhou 221116,China;Geotechnical Engineering Research Institute,Goethe University Frankfurt,Freiberg 09596,Germany)

机构地区：[1]辽宁石油化工大学土木工程学院石油化工特种建筑材料重点实验室,辽宁抚顺113001 [2]中国矿业大学矿业工程学院深部煤炭资源开采教育部重点实验室,江苏徐州221116 [3]德国弗赖贝格工业大学岩土工程研究所,德国弗赖贝格09596

出　　处：《矿业安全与环保》2022年第1期14-19,共6页Mining Safety & Environmental Protection

基　　金：辽宁省教育厅科学技术研究一般青年资助项目(L2020050);辽宁石油化工大学人才引进科研启动基金项目(2019XJJL-025);辽宁省教育厅基础项目(L2020029)。

摘　　要：利用热电偶多路温度测试仪和红外热像仪,分别测定了砂岩平台巴西圆盘试样Ⅰ型起裂裂纹发育过程中的物理温度和红外辐射温度变化。热电偶多路温度测试过程中,约95%的试样裂纹起裂时载荷发生应力调整,与此同时其物理温度突增,最高升温幅度0.74℃(平均0.16℃)。红外热像仪测试过程中,约20%的试样裂纹起裂时红外辐射温度升高(平均0.03℃)。试验结果表明,物理测温技术和红外测温技术可以捕捉到煤岩破坏前产生裂纹过程的温度变化信息。By using thermocouple multi-channel temperature tester and infrared thermal imager,the changes of physical temperature and infrared radiation temperature during mode-Ⅰcrack development of sandstone flattened Brazilian disk(FBD)specimen were measured respectively.In the thermocouple multi-channel temperature test,about 95%of the specimens have experienced stress change at the crack initiation,while the physical temperature increases abruptly,with the maximum temperature increases by 0.74℃(the average temperature increases by 0.16℃).In the test of infrared thermal imager,the infrared radiation temperature of about 20%specimens increases at crack initiation(the average temperature increases by 0.03℃).The experimental results show that the physical temperature measurement technology and infrared temperature measurement technology can capture the temperature variation in crack development before coal and rocks fail.

关 键 词：平台巴西圆盘 Ⅰ型裂纹 温度场 红外辐射 裂纹发育 应力调整 

分 类 号：TD315[矿业工程—矿井建设]