[1]柴 敬,杜文刚,袁 强,等.物理模型试验光纤传感技术测试方法分析[J].西安科技大学学报,2018,(05):728-736.[doi:10.13800/j.cnki.xakjdxxb.2018.0506]
 CHAI Jing,DU Wen-gang,YUAN Qiang,et al.Analysis of test method for physical model test based on optical fiber sensing technology detection[J].Journal of Xi'an University of Science and Technology,2018,(05):728-736.[doi:10.13800/j.cnki.xakjdxxb.2018.0506]
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物理模型试验光纤传感技术测试方法分析(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2018年05期
页码:
728-736
栏目:
出版日期:
2018-09-30

文章信息/Info

Title:
Analysis of test method for physical model test based on optical fiber sensing technology detection
文章编号:
1672-9315(2018)05-0737-06
作者:
柴 敬12杜文刚1袁 强1张丁丁12
1.西安科技大学 能源学院,陕西 西安 710054; 2.西安科技大学 西部矿井开采及灾害防治教育部重点实验室,陕西 西安 710054
Author(s):
CHAI Jing12DU Wen-gang1YUAN Qiang1ZHANG Ding-ding12
1.College of Energy Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Key Laboratory of Western Mine Exploitation and Hazard Prevention,Ministry of Education,Xi'an University of Science and Technology,Xi'an 710054,China
关键词:
矿业工程 模型试验 测试方法 光纤传感 应变监测
Keywords:
mining engineering model test monitoring method optical fiber sensing strain detection
分类号:
TD 325
DOI:
10.13800/j.cnki.xakjdxxb.2018.0506
文献标志码:
A
摘要:
地下工程常处于复杂三向应力状态,立体模型更能真实反映采场围岩应力状态。将传感光纤分别布置于几何尺寸为3 000 mm×200 mm×1 280 mm平面应力模型和3 600 mm×2 000 mm×2 000 mm立体模型中,分析工作面与光纤不同空间位置时模型应变分布规律。结果表明:传感光纤在模型相似材料铺装前应施加轴向预应力,保持光纤处于预拉状态; 温度定位法可实现光纤精准空间定位,当试验环境温度变化明显时,需对传感光纤进行温度补偿以消除温度效应引起的应变测量误差; 采动岩体应变分布呈现3个阶段:工作面靠近光纤时,超前支承压力引起下位覆岩应变呈负向台阶变化; 工作面过光纤时,垮落、离层区岩层断裂下移引起应变曲线正向台阶变化; 工作面远离光纤后,采空区重新压实导致光纤处于受压状态,研究结果对岩土工程类立体模型试验监测具有一定借鉴意义。
Abstract:
Underground engineering is often in the complex three-dimensional stress state,three-dimensional model can actually reflect the stress state of surrounding rock.The sensing fibers are arranged in the plane model with the size of 3 000 mm×200 mm×1 280 mm and the three-dimensional model with the size of 3 600 mm×2 000 mm×2 000 mm,the strain distribution of the model has been analyzed when the working face and the fiber are in different positions.The results show:Sensing fiber should be applied with axial pre-stressing to keep the fiber in pre-tensioned state; Temperature positioning method can achieve fiber spatial positioning; When the temperature changes significantly,the result must be compensated to eliminate the strain measurement error caused by the temperature effect; the strain shift of the optical fiber is in three stages:when the working face is close to the fiber,the strain curve shows a negative step change caused by the lead abutment pressure; when the working face crosses the fiber,the strain curve shows a positive step change because the fracture rock move downward; after the face far away from the fiber,the caving zone re-compaction causes the optical fiber to be under pressure state.

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备注/Memo

备注/Memo:
收稿日期:2018-02-21 责任编辑:刘 洁
基金项目:国家自然科学基金(41027002); 高等学校博士学科点专项科研基金(20126121110003)
通信作者:柴 敬(1964-),男,宁夏平罗人,教授,博士生导师,E-mail:chaij@xust.cn
更新日期/Last Update: 2018-09-30