School of Energy Engineering,Xi'an University of Science and Technology Key Laboratory of Western Mine
Exploitation and Hazard Prevention of Ministry of Education Chongqing Research Institute Co. ,Ltd. ,China Coal
Technology and Engineering Group

为了研究岩层移动变形相似材料模拟试验过程,采用布里渊光时域分析技术(BOTDA)对相似材料模拟试验进行分布式应变测量,在3 m平面应力模型内埋设2根传感光纤,对应位置布置百分表5个,对比分析岩层移动变形过程中的布里渊频移变化。试验结果表明:BOTDA分布式光纤传感技术实现了相似材料模拟试验的分布式应变测量,不仅能很好地测量光纤沿线的岩层垮落情况,而且能够感知和反映某一点处岩层的移动变形特征,为相似材料模拟试验提供了一种全新的测试方法,对相似材料模拟试验测试技术的发展有积极作用。

In order to study the process of strata movement similar material simulation experiment, Brillouin optical time domain analysis( BOTDA) technology was use d to measure strain of similar material simulation. The two optical fibers were embedded in 3 m plane stress simulation and 5 dial gage were installed on the respective pos ition,comparing analysis of Brillouin frequency shift change of strata movement and deformation process. The results showed that BOTDA distributed optical fiber sensing t echnology could realize the distributed strain measurement of similar material simulation,not only could accurately measure the strata collapse state of the fiber along,but a Iso could sense and reflect the movement and deformation characteristics of strata at some point. This research provided a new testing method for similar material simulati on experiment,and had a positive effect on the development of similar material simulation testing technology.

国家自然科学基金资助项目(51174280,41027002)；高等学校博士学科点专项科研基金资助项目(20126121110003)；