构造模拟实验中的光纤应变测量  

Measurements of optical fiber strain in structural analogue modeling experiments.

作　　者：解国爱[1] 贾东[1] 吴晓俊[1] 张丹[1] 施斌[1] 刘正[1] 

机构地区：[1]南京大学地球科学系,江苏南京210093

出　　处：《地质通报》2007年第5期520-525,共6页Geological Bulletin of China

基　　金：国家自然科学基金项目(编号:40672132;40372091);南京大学"211工程"项目资助

摘　　要：在砂箱中埋设光纤模拟脆性挤压变形,运用布里渊光时域反射测量技术(BOTDR)对光纤应变分布进行测量,并与模型变形比较。研究结果表明,光纤应变传感技术可以用来测量构造模拟实验中的应变大小,模型中的应变是由挤压部位逐渐向挤压前方传递的,应变量剧增的部位是断裂或褶皱构造发育的位置,从而可以运用光纤传感技术预测模型潜在的变形位置,为进一步进行模型内部应变研究打下基础。Optical fiber was buried in a sand box to simulate brittle compressional deformation and the distribution of optical fiber strain was measure by using the Brillouin optical time domain reflectometer （BOTDR） and compared with the model deformation. The results show that the optical fiber strain sensing technique can be used to measure the strain magnitude in the structural analogue modeling experiment. In the experiment, strain propagated forward from the pushing end, and the portion where the strain magnitude increased abruptly is the location where faults or folds are developed. Therefore we can use the technique to foresee the potential deformation part of the analogue model and lay a foundation for a further model strain study.

关 键 词：构造模拟实验 应变测量 分布式光纤传感 BOTDR 

分 类 号：P313[天文地球—固体地球物理学] P589.1[天文地球—地球物理学]