遥感-岩石力学(I)——非连续组合断层破裂的热红外辐射规律及其构造地震前兆意义
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摘要
以构造地震孕震机制之一即非连续组合断层破裂发震为模拟对象,利用双轴加载实验系统和红外热像仪,对雁列和同线非连通这两种非连续组合断层在双轴加载破裂失稳过程中的红外辐射特征进行了模拟实验研究。研究表明:双轴加载过程中岩石表面红外辐射温度的变化对应岩石应力变化,具有阶段性规律,包括初始、弹性、应力闭锁、解锁和屈服破裂5个阶段。自弹性阶段开始至解锁阶段,岩石表面的平均红外辐射温度(AIRT)的动态曲线表现为“上升-下降-再上升”的演变特征;而断层雁列区和非连通区在解锁阶段其热像出现高温异常条带,非连通区的高温异常条带还具有“增强-减弱(平静)-再增强”的演变特征。其地震前兆的时空意义为:(1)构造地震活动区卫星遥感AIRT的上升趋势可作为地震中期预警指标;(2)热像局部正异常条带预示未来震源位置;(3)AIRT下降与热像局部热异常条带的减弱(平静)一起,可作为构造地震的短临前兆。
The fracturing of discontinuous jointed faults is a mechanism of tectonic earthquake. By use of biaxial loading system and thermal infrared imaging system,the thermal infrared radiation features of two kinds of discontinuous jointed faults,en echelon faults and collinear disconnected faults,were experimentally studied in the process of loading and fracturing. It is revealed that the thermal infrared radiation of the surface of loaded samples is related to the load stress,and the variation stage can be classified into five stages including initial,elastic,stress blocking,stress deblocking and fracturing stage. From elastic stage to stress deblocking one,the dynamic curve of average infrared radiation temperature (AIRT) vs time is of the features of rising to dropping,and to rising again. During the stage of stress deblocking,positive infrared abnormity strip emerges in the discontinuous locations of en echelon faults and disconnected faults,and the positive infrared abnormity strip of disconnected faults is of the features of enhancing to weakening (or silence),and to enhancing again. Its important meanings for earthquake omens include that (1) the rise of AIRT curve of satellite infrared remote sensing for the seismic active region can be taken as the index for the middle-term forecast of structural earthquake,(2) the location of local positive infrared abnormity strip can be used to predict the location of hypocenter and (3) the dropping of AIRT curve together with the weakening (silence) of local positive infrared abnormity strip can be taken as the short-term prediction omen.
引文
1 Verber K. Remote sensing methods and catastrophes: the role of spaceimages for predication and reduction of losses due to geologicalcatastrophes[A]. In:Proc. 27th Int. Geol. Congress[C]. Moscow:IGC,1984,1 681~1 687
    2 Gorny V I,Salman A G,Tronin A A, et al. The earth outgoing IRradiation as an indicator of seismic activity[J]. Proc. Acad. Sci. USSR,1988,30(1):67~69
    3 强祖基,徐秀登,赁常恭. 卫星热红外异常-临震前兆[J]. 科学通报,1990,35(17):1 324~1 327
    4 Xu X D,Qiang Z J,Dian C G. Abnormal increasing of satellitethermal IR and ground surface temperature of impendingearthquakes[J]. Chinese Sci. Bull.,1991,36(4):291~294
    5 Huang G,Luo Z. Monitoring and predicting strong earthquake usingNOAA data[A]. In:Proc. ISPRS'92 Congress XVII[C]. WashingtonD.C.:ISPRS,1992,29(B7):357~366
    6 强祖基,赁常恭,李玲芝等. 卫星热红外图像亮温异常--短临震兆[J].中国科学(D 辑),1998,28(6):564~573
    7 李世愚,吴忠良,张天中等. 关于中国地震孕育和前兆机理研究的讨论[J]. 国际地震动态,1998,(8):1~7
    8 Tronin A A. Satellite thermal survey:a new tool for the study ofseismoactive regions[J]. Int. J. Remote Sensing,1996,17(8):1 439~1 455
    9 Qiang Z J,Dian C G,Li L Z,et al. Satellite thermal IR increasetemperature anomalous field with imminent and short-term predictionbefore earthquake[A]. In:Proc. of IEAS'97 & IWGIS'97[C]. Beijing:[s. n.],1997,3:1 266~1 270
    10 刘德富,罗灼礼,彭克银. 强烈地震前的 OLR 异常现象[J]. 地震,1997,17(2):126~132
    11 Liu D F,Peng K Y,Liu W H,et al. There are thermal precursors forearthquake[J]. ACTA Seismologica Sinica,1999,21(6):652~656
    12 Cui C Y,Zhang J K,Xiao Q,et al. Monitoring the thermal IR anomalyof Zhangbei earthquake precursor by satellite remote sensingtechnique[A]. In:Proc. 20th Asia RS Congress[C]. Hongkong:[s. n.],1999,1 179~1 184
    13 马 瑾,单新建. 利用遥感技术研究断层现今活动的探索[J]. 地震地质,2000,22(3):210~215
    14 耿乃光,崔承禹,邓明德. 岩石破裂实验中的遥感观测与遥感岩石力学的开端[J]. 地震学报,1992,14(增):645~652
    15 崔承禹,邓明德,耿乃光. 在不同压力下岩石光谱辐射特性研究[J]. 科学通报,1993,38(6):538~541
    16 邓明德,崔承禹,耿乃光. 遥感用于地震预报的理论及实验结果[J].中国地震,1993,9(2):163~169
    17 Wu L X,Wang J Z. Features of infrared thermal image and radiationtemperature of coal rocks loaded[J]. Science in China,1998,41(2):158~164
    18 Wu L X,Wang J Z. Infrared Radiation Features of Coal and Rocksunder Loading[J]. Int. J. Rock Mech. & Min. Sci,1998,35(7):969~976
    19 Wu L X,Cui C Y,Geng N G,et al.Remote sensing rock mechanics(RSRM) and associated experimental studies[J]. Int. J. Rock Mech. &Min. Sci,,2000,37(6):879~888
    20 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
    21 吴立新,李国华,吴焕萍. 热红外成像用于固体撞击瞬态过程监测的实验探索[J]. 科学通报,2001,46(2):172~176
    22 刘善军,吴立新,吴焕萍等. 多暗色矿物类岩石单轴加载过程中红外辐射定量研究[J]. 岩石力学与工程学报,2002,21(11):1585~1589
    23 Wu L X,Liu S J,Wu Y H,et al. Changes in IR with rockdeformation[J]. Int. J. Rock Mech. & Min. Sci.,2002,39(6):825~831
    24 马 瑾,马胜利,刘力强等. 断层几何结构与物理场的演化及失稳特征[J]. 地震学报,1996,18(2):200~207
    25 马文涛,马 瑾,刘力强等. 雁列断层变形过程中的声发射特征[J].地震地质,1995,17(14):342~348
    26 马胜利,刘力强,邓志辉等. 雁列式断层变形过程中物理场演化的实验研究(一)[J]. 地震地质,1995,17(4):328~335
    27 马胜利,刘力强,邓志辉等. 雁列式断层变形过程中物理场演化的实验研究(二)[J]. 地震地质,1995,17(4):336~341
    28 刘力强,马 瑾,马胜利. 雁列构造的几何及其应力场的数值模拟[J]. 地震地质,1998,20(1):44~53
    29 高福旺,刘北顺. 首都圈体应变变化特征与 6级地震的关系[J]. 中国地震,1999,15(4):370~376
    30 孟国杰,魏凯武. 张北 6.2 级地震前的地壳形变特征[J]. 地震,1999,19(3):261~266
    31 吕琪琦,丁鉴海,崔承禹等. 张北 6.2 级地震前的卫星热红外异常[J]. 地震,1998,18(3):240~244
    32 徐秀登,徐向民. 地震前红外异常的基本特征与成因机理[J]. 西北地震学报,2001,23(3):310~312
    33 Harwood N,Cummings W M. Thermoelastic Stress Analysis[M].Bristol:IOP Publishing Ltd,1991
    34 高文学,马 瑾. 首都圈地震地质环境与地震灾害[M]. 北京:地震出版社,1993

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