多暗色矿物类岩石单轴加载过程中红外辐射定量研究
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摘要
对首都圈地区的多暗色矿物类岩石(花岗闪长岩、辉长岩及片麻岩)进行了单轴加载至破裂过程的热红外遥感监测实验,发现:(1) 在加载至应力峰值过程中,岩石平均红外辐射温度与应力呈线性正相关关系;(2) 在加载至应力峰值过程中,岩石平均红外辐射温度与所受机械功呈三次曲线关系;(3) 应力峰后-破裂过程中,岩石沿剪切破裂带辐射温度升高,而在应力松弛或张性区,辐射温度有所降低;(4) 损伤岩石在单轴加载过程中红外辐射温度变化与完整岩石相比总体规律相似,但波动性较大。基于实验分析,建立了岩石应力与红外辐射温度以及机械能与红外辐射温度的定量关系;并对地震遥感及其热红外前兆的物理-力学机制进行了讨论。
The quantitative characteristics of thermal infrared radiation (TIR) of rocks(granodiorite,gneiss and gabbro)around the capital area,Beijing,China,in condition of uni-axial loading,were experimentally studied. It was discovered that (1) the relationship between the rock samples average infrared radiation temperature (AIRT) and its axial stress is positive linearly related before peak stress,(2) the relationship-curve between the rock samples AIRT and its accepted mechanical energy is cubic before peak stress,(3) the IRT rises inside the samples shearing zone,while drops in its lax zone after peck stress,and (4) the tendency of the AIRT variation of pre-damaged rock samples is similar to that of intact rock samples except its fluctuation. Finally,the functions between the samples AIRT and its axial stress,and the relationship between the samples AIRT and its accepted mechanical energy,are quantitatively given. Besides,the physico-mechanical mechanism of earthquake remote sensing as well as its TIR precursors is discussed.
The quantitative characteristics of thermal infrared radiation (TIR) of rocks(granodiorite,gneiss and gabbro)around the capital area,Beijing,China,in condition of uni-axial loading,were experimentally studied. It was discovered that (1) the relationship between the rock samples average infrared radiation temperature (AIRT) and its axial stress is positive linearly related before peak stress,(2) the relationship-curve between the rock samples AIRT and its accepted mechanical energy is cubic before peak stress,(3) the IRT rises inside the samples shearing zone,while drops in its lax zone after peck stress,and (4) the tendency of the AIRT variation of pre-damaged rock samples is similar to that of intact rock samples except its fluctuation. Finally,the functions between the samples AIRT and its axial stress,and the relationship between the samples AIRT and its accepted mechanical energy,are quantitatively given. Besides,the physico-mechanical mechanism of earthquake remote sensing as well as its TIR precursors is discussed.
引文
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2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
3WuL X,WangJ Z.Features of infrared thermal image and radiation temperature of coal rocks loaded[J].Science inChina(D),1998,41(2):158～164
4WuL X,WangJ Z.Infrared radiation features of coal and rocks under loading[J].Int.J.RockMech.&Min.Sci.,1998,35(7):969～976
5WuL X,CuiC Y,GengN G,et al.Remote sensing rock mechanics(RSRM) and associated experimental studies[J].Int.J.RockMech. andMin.Sci.,2000,37(6):879～888
6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
7WuL X,WuH P,LiG H.Experimental exploration to thermal infrared imaging for detecting the transient process of solid impact[J].ChineseScienceBulletin,2001,46(10):872～877
8张东胜.红外辐射等温区与光弹性等差线对应关系的研究[博士学位论文][D].北京:中国矿业大学,2000
9周友华.地震孕育机制与破裂机制的研究[J].地球科学进展,2000,15(6):637～643
10梅世蓉,冯德益,张国民等.中国地震预报概论[M].1993,北京:地震出版社:498
11徐秀登,徐向民,强祖基.红外临震异常的基本特征与成因机理再认识[J].浙江师大学报(自然科学版),1994,17(3):43～47
12GornyV I,SalmanA G,TroninA A,et al.The earth outgoingIR radiation as an indicator of seismic activity[J].Proceeding of theAcademy ofSciences of theUSSR.,1988,301(1):67～69
13TroninA A.Satellite thermal survey—a new tool for the study of seismoactive regions[J].Int.J.RemoteSensing,1996,17(8):1439～1455
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