裂纹扩展过程红外热像实验及数值模拟研究
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摘要
采用花岗岩材料通过红外热像和数值实验的方法,对两预制裂纹导致的岩石中新裂纹孕育、繁衍、萌生、扩展和贯通机制,以及由此引起的试样宏观强度变化等进行分析.通过红外热像遥感观测方法以及数值模拟对7块预制双裂纹的试样进行了实验研究.结果表明,裂纹扩展过程中,脆性破裂的声发射前兆不明显,在主破裂发生之前有小规模声发射现象,但释放的能量不多,只有在主破裂发生时产生大量声发射,特别是岩爆类型的破坏.试样破裂过程中有红外异常现象,在破裂处会出现明显的高温区和高温条带,并指出斑状花岗岩在破裂前主要表现为高温前兆.
An experimental research of the infrared thermal image in the process of rock fracture was carried out.The study used the granite with the double crack objection analyze the crack initiation,propagation,coalescence,interaction,and the change of macro-strength leaded by them.I did the infrared thermal image examination and numerical simulation for 7 granite sample with double crack to view the regularity of rock failure.The results evince that the AE prognostic of rock's brittleness fracture is not obviously.There will be small scale AE phenomenon before the rock's main fracture,and they release a little energy.When the rock happens the main failure,it will bring out lots of AE,especially in rock burst.The event of experiment confirmed that there are infrared abnormal phenomenon during the rock facture process,and the high temperature realm or stripe at the fracture field.The experiment results indicated that the infrared characteristic of porphyritic texture granite before failure represents the high temperature prognostic.
An experimental research of the infrared thermal image in the process of rock fracture was carried out.The study used the granite with the double crack objection analyze the crack initiation,propagation,coalescence,interaction,and the change of macro-strength leaded by them.I did the infrared thermal image examination and numerical simulation for 7 granite sample with double crack to view the regularity of rock failure.The results evince that the AE prognostic of rock's brittleness fracture is not obviously.There will be small scale AE phenomenon before the rock's main fracture,and they release a little energy.When the rock happens the main failure,it will bring out lots of AE,especially in rock burst.The event of experiment confirmed that there are infrared abnormal phenomenon during the rock facture process,and the high temperature realm or stripe at the fracture field.The experiment results indicated that the infrared characteristic of porphyritic texture granite before failure represents the high temperature prognostic.
引文
[1]支毅乔,崔承禹,张晋开,等.红外热像仪在岩石力学遥感基础实验中的应用[J].环境遥感,1996,11(3):161-167.
[2]吴立新,王金庄.煤岩受压屈服的热红外辐射温度前兆研究[J].中国矿业,1997,6(6):42-48.
[3]耿乃光,于萍,邓明德,等.热红外震兆成因的模拟实验研究[J].地震,1998,18(1):83-88.
[4]WU L X,CUI C Y,GENG N G,et al.Remote sensing rock mechanics(RSRM)and associated experimental studies[J].J Rock Mech and Min Sci,2000,37(6):879-888.
[5]吴立新.遥感岩石力学及其新近进展与未来发展[J].岩石力学与工程学报,2001,20(2):139-146.
[6]WU LIXIN,LIU SHANJUN,WU YUHUA,et al.Changes in infrared radiation with rock deformation[J].Rock Mechand Min Sci,2002,39(4):825-831.
[7]董玉芬,王来贵,刘向峰,等.岩石变形过程中红外辐射的实验研究[J].岩土力学,2001,22(2):134-137.
[8]谭志宏,唐春安,朱万成,等,含缺陷花岗岩破坏过程中的红外热像试验研究[J].岩石力学与工程学报,2005,24(16):2977-2981.
[9]TANG C A,Numerical simulation of progressive rock failure and associated seismicity[J].Rock Mech Min Sci,1997,34(2):249-262.
[10]TANG C A,LIN P,LIU H Y.et al.On failure modes and strength characterization of brittle disordered materials underuniaxial compression and tension[J].Key engineering materials,2000,183/187:637-642.
[2]吴立新,王金庄.煤岩受压屈服的热红外辐射温度前兆研究[J].中国矿业,1997,6(6):42-48.
[3]耿乃光,于萍,邓明德,等.热红外震兆成因的模拟实验研究[J].地震,1998,18(1):83-88.
[4]WU L X,CUI C Y,GENG N G,et al.Remote sensing rock mechanics(RSRM)and associated experimental studies[J].J Rock Mech and Min Sci,2000,37(6):879-888.
[5]吴立新.遥感岩石力学及其新近进展与未来发展[J].岩石力学与工程学报,2001,20(2):139-146.
[6]WU LIXIN,LIU SHANJUN,WU YUHUA,et al.Changes in infrared radiation with rock deformation[J].Rock Mechand Min Sci,2002,39(4):825-831.
[7]董玉芬,王来贵,刘向峰,等.岩石变形过程中红外辐射的实验研究[J].岩土力学,2001,22(2):134-137.
[8]谭志宏,唐春安,朱万成,等,含缺陷花岗岩破坏过程中的红外热像试验研究[J].岩石力学与工程学报,2005,24(16):2977-2981.
[9]TANG C A,Numerical simulation of progressive rock failure and associated seismicity[J].Rock Mech Min Sci,1997,34(2):249-262.
[10]TANG C A,LIN P,LIU H Y.et al.On failure modes and strength characterization of brittle disordered materials underuniaxial compression and tension[J].Key engineering materials,2000,183/187:637-642.
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