钻孔植入光纤Bragg光栅检测岩层变形的模拟实验  

Simulation Experiment of Embedded Fiber Bragg Grating Monitoring in Rock Deformation Through Borehole

作　　者：柴敬[1,2] 邱标[1,3] 李毅[1,2] 朱磊 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]西安科技大学西部矿井开采与灾害防治教育部重点实验室,陕西西安710054 [3]西弗吉尼亚大学采矿工程系,美国西弗吉尼亚摩根墩26505 [4]中煤西安设计工程公司,陕西西安710054

出　　处：《采矿与安全工程学报》2012年第1期44-47,共4页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(50774060);国家自然科学基金科学仪器专项项目(41027002);陕西省岩层控制重点实验室项目(08JS42)

摘　　要：为了探索煤矿岩层变形的钻孔光纤检测方法,采用物理相似材料模型模拟岩层的压缩和沉降过程,设计并制作一个埋入3个光纤Bragg光栅传感器的水泥砂浆预制棒,用于模拟钻孔。测试了岩层压缩沉降变形过程中水泥砂浆预制棒的变形和由此引起的光纤Bragg光栅波长变化,并与对应位置的应变片监测结果进行了对比分析。实验表明,光纤光栅传感器具有精度高、可靠及耐久等优点,能实现岩层变形的实时监测,钻孔植入式光纤Bragg光栅传感系统为岩层变形监测提供了一种有效的方法。To explore the rock deformation in coal mine by the monitoring of embedded fiber Bragg grating（FBG） through deep borehole,an experimental physical simulation model was built for simulating the strata compression and subsidence process.Additionally,a prefabricate concrete bar with three embedded FBG sensors was designed to simulate deep borehole,and was placed in the physical model.The deformation of the prefabricate concrete bar during strata compression and subsidence processes was measured by the wavelength changes of FBG sensors,and was compared to the strain changes monitored by a resistance strain gauge located on the prefabricate concrete bar at the same location.The test results show that the FBG monitoring system has the advantages of high sensitive,reliable and stable,etc,and can realize the real-time monitoring of rock deformation.It is proved that the FBG monitoring system is an efficient method for measuring and understanding deformation of deep rock strata through a surface borehole.

关 键 词：采矿工程 光纤光栅传感器 岩层变形 钻孔 模型实验 

分 类 号：TD32[矿业工程—矿井建设]