基于FBG-BOTDA的锚杆拉拔试验研究  

Study on Pull-out Test of Anchor Bolt Based on FBG-BOTDA Combined Sensing Technology

作　　者：柴敬[1,2] 秋丰岐 李廷博 张丁丁[1,2] 刘奇[1] 刘永亮 CHAI Jing;QIU Fengqi;LI Tingbo;ZHANG Dingding;LIU Qi;LIU Yongliang(School of Energy Resource,Xi’an University of Science and Technology,Xi’an 710054,China;Key Laboratory of Western Mine Exploitation and Hazard Prevention,Ministry of Education,Xi’an University of Science and Technology,Xi’an 710054,China)

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]西安科技大学教育部西部矿井开采与防治重点实验室,陕西西安710054

出　　处：《煤矿安全》2019年第10期62-65,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目（51174280,51804244）;陕西省教育厅科学研究计划资助项目（16JK1488）;陕西省创新能力支撑计划资助项目（2018TD-038）

摘　　要：将FBG和PPP-BOTDA技术联合应用于室内锚杆拉拔试验,并通过ANSYS数值模拟对试验结果进行验证。结果表明:FBG和BOTDA传感器测得不同拉拔载荷下锚杆轴向应力均呈"负指数分布",且载荷影响的范围主要集中在距孔口55 cm以内区域,与数值模拟得到的结果基本一致;FBG-BOTDA联合感测技术既能精确获取关键点的受力情况,又能全面监测锚杆的受力区域以及应力分布状况。FBG and PPP-BOTDA are applied to anchor bolt pull-out test in the indoor together,and the test results are verified by ANSYS numerical simulation.The results indicate that the axial stress of bolt under different pull-out loads measured by FBG and BOTDA sensors shows a"negative exponential distribution",and the influence range of load is mainly concentrated within 55 cm from the orifice,which is basically consistent with the results obtained by numerical simulation;FBG-BOTDA combined sensing technology can not only accurately obtain the stress condition of key points,but also comprehensively monitor the stress area and stress distribution of the bolt.

关 键 词：FBG-BOTDA技术 锚杆拉拔试验 数值模拟 轴向应力 锚固深度 

分 类 号：TD353.6[矿业工程—矿井建设]