采场覆岩垮落形态与演化的分布式光纤检测试验研究  

Experimental study of overlying mine strata collapse and its evolution by a distributed optical fiber system

作　　者：柴敬[1,2] 薛子武 郭瑞 张丁丁[1,2] 袁强[1] 李毅[1,2] CHAI Jing;XUE Ziwu;GUO Rui;ZHANG Dingding;YUAN Qiang;LI Yi(School of Energy Science and Engineering,Xi＇an University of Science and Technology,Xi＇an,Shaanxi 710054,China;Key Laboratory of Western Mine Exploitation and Hazard Prevention,Ministry of Education,Xi＇an,Shaanxi 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：《中国矿业大学学报》2018年第6期1185-1192,共8页Journal of China University of Mining & Technology

基　　金：国家自然科学基金项目(51174280);陕西省教育厅专项科研计划项目(16JK1488)

摘　　要：为了对煤矿上覆岩层变形破坏规律进行研究,将分布式光纤传感技术应用于三维立体模型试验.在3.6m×2.0m×2.0m的三维立体模型中,模拟2个工作面开挖,沿工作面1和2推进方向铺设水平分布式传感光纤,每次工作面完成回采后用NBX-6055应变分析仪采集数据,分析工作面1,2的传感光纤布里渊(Brillouin)频移值与上覆岩层变形破断的关系.结果表明:用布里渊频移平均变化度的概念可以对工作面1,2的上覆岩层来压情况进行判别;传感光纤布里渊频移曲线反映了上覆岩层变形的位置和程度,从而得出开挖过程中覆岩的采动影响范围及岩层垮落角;传感光纤测试数据比测管位移测试更加精确.In order to study the overburden deformation and fracture behavior in a coal mine,the Brillouin Optical Time-Domain Analysis（BOTDA）was applied to a three-dimensional model test.In the three-dimensional model of 3.6 m（L）×2.0 m（W）×2.0 m（H）,two stimulated working faces were excavated,and two optical fibers were embedded and horizontally distributed along two working faces moving in opposite directions.Data were collected with the NBX-6055 strain analyzer after a working face completed its movement,so that the relationship between Brillouin frequency shift and overburden deformation could be analyzed.The results show that the initial pressure and period pressure on the overlying strata of working face 1 and2 can be distinguished using the concept of average variation of Brillouin frequency shift.The displacement measurement of the initial tube is more accurate,and the Brillouin frequency shift curve from the sensing optical fiber reflects the position and degree of deformation of the over-lying strata,which can be used to obtain the mining influence range and rock caving angle of overlying strata during excavation.

关 键 词：采矿工程 立体模型 分布式光纤传感技术 覆岩变形 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]