[1]柴 敬,孙亚运,钱云云,等.基于FBG-BOTDA联合感测的岩层运动试验研究[J].西安科技大学学报,2016,(01):1-7.
 CHAI Jing,SUN Ya-yun,QIAN Yun-yun,et al.Strata movement testing based on FBG-BOTDA combined sensing technology in similar model[J].Journal of Xi'an University of Science and Technology,2016,(01):1-7.
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基于FBG-BOTDA联合感测的岩层运动试验研究(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2016年01期
页码:
1-7
栏目:
出版日期:
2016-02-28

文章信息/Info

Title:
Strata movement testing based on FBG-BOTDA combined sensing technology in similar model
文章编号:
10.13800/j.cnki.xakjdxxb.2016.0101
作者:
柴 敬12孙亚运1钱云云1宋 军1马伟超1李 毅12
1.西安科技大学 能源学院,陕西 西安 710054; 2.教育部 西部矿井开采及灾害防治重点实验室,陕西 西安 710054
Author(s):
CHAI Jing12SUN Ya-yun1QIAN Yun-yun1 SONG Jun1MA Wei-chao1LI Yi12
1.College of Energy Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Key Laboratory of Western Mine Exploration and Hazard Prevention,Ministry of Education,Xi'an 710054,China
关键词:
模拟试验 温度补偿 FBG-BOTDA联合感测 岩层运动
Keywords:
simulation test temperature compensation FBG-BOTDA combined sensing strata movement
分类号:
TD 325; TP 212
文献标志码:
A
摘要:
为研究采场上覆岩层运动过程中的应力应变,将准分布式布拉格光纤光栅技术(FBG)和基于脉冲预泵浦布里渊光时域分析的分布式光纤传感技术(PPP-BOTDA)联合应用于相似材料模型试验的测试中。在2 m平面应力模型内埋设2根分布式传感光纤和2个光纤光栅应变传感器,模型尺寸2 000 mm×180 mm×1 700 mm,几何相似比1:250,测试主关键层由弯曲下沉发育至断裂的变形运动过程。试果表明,2煤开采过程中分布式传感光纤应变曲线体现了岩层的连续变形下沉,曲线中间位置出现应力集中; 3煤开采过程中分布式传感光纤应变曲线体现了发生断裂的岩层运动,断裂后的岩层应力得到释放; 连续变形下沉的岩层FBG传感器应变曲线呈宽缓峰状,应变值达到4 367.48 με; 断裂的岩层曲线呈尖峰状,最大应变值达到4 892.82 με.实现了模型试验中主关键层由连续体转变为半连续体过程的实时监测。
Abstract:
For the study of stress and strain in the process of mining overburden movement,the quasi-distributed fiber Bragg grating(FBG)and the brillouin scattering optical time-domain analysis based on pre-pumping technique(PPP-BOTDA)are applied to similar material model test together.Two sensing fibers and two fiber Bragg grating strain sensors were embedded in the 2 m plane stress physical model,the model size 2 000 mm×180 mm×1 700 mm and geometric similarity ratio 1:250,for analyzing the stress and strain of the main key strata from the process of flexural settlement development to fracture.The results of the study show that 2# coal mining of horizontal strain optical fiber's curve reflects the continuous deformation of the strata in the middle position of the stress concentration.In the process of 3# coal seam mining,horizontal strain optical fiber's curve shows that a stress release phenomenon occurred while the model was stable.FBG sensor strain curves shows a broad peak while the continuous deformation of the layered rock fissure appears,and the maximum strain value is 4 367.48 με.The fracture type of the layered rock is failure,and the curve is a spike like,the maximum strain value to 4 892.82 με.This experiment realizes the real-time monitoring of key strata,which the whole and the part of the process of continuous changing to a semi continuous.

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相似文献/References:

[1]樊 荣,侯媛彬,张轶斌,等.基于专家系统随机逼近的激光传感器的温度补偿研究[J].西安科技大学学报,2015,(04):492.
 FAN Rong,HOU Yuan-bin,ZHANG Yi-bin,et al.Temperature compensation of laser sensor by stochastic approximation based on expert system[J].Journal of Xi'an University of Science and Technology,2015,(01):492.
[2]魏世明,柴 敬,邓 明.相似模拟实验中光纤光栅传感测试的温度补偿[J].西安科技大学学报,2007,(04):565.
 WEI Shi-ming,CHAI Jing,DENG Ming.Temperature compensation for FBGs in simulation experiments[J].Journal of Xi'an University of Science and Technology,2007,(01):565.

备注/Memo

备注/Memo:
收稿日期:2015-10-22 责任编辑:李克永 基金项目:国家自然科学基金项目(41027002); 高等学校博士学科点专项科研基金项目(20126121110003) 通讯作者:柴 敬(1964-),男,宁夏平罗人,教授,博士生导师,E-mail:chaij@xust.edu.cn
更新日期/Last Update: 1900-01-01