孙斌杨, 张平松. 2021. 基于DFOS的采场围岩变形破坏监测研究进展与展望[J]. 工程地质学报, 29(4): 985-1001. doi: 10.13544/j.cnki.jeg.2021-0290.
    引用本文: 孙斌杨, 张平松. 2021. 基于DFOS的采场围岩变形破坏监测研究进展与展望[J]. 工程地质学报, 29(4): 985-1001. doi: 10.13544/j.cnki.jeg.2021-0290.
    Sun Binyang, Zhang Pingsong. 2021. Research progress and prospect of surrounding rock deformation and failure monitoring in stope based on DFOS[J]. Journal of Engineering Geology, 29(4): 985-1001. doi: 10.13544/j.cnki.jeg.2021-0290.
    Citation: Sun Binyang, Zhang Pingsong. 2021. Research progress and prospect of surrounding rock deformation and failure monitoring in stope based on DFOS[J]. Journal of Engineering Geology, 29(4): 985-1001. doi: 10.13544/j.cnki.jeg.2021-0290.

    基于DFOS的采场围岩变形破坏监测研究进展与展望

    RESEARCH PROGRESS AND PROSPECT OF SURROUNDING ROCK DEFORMATION AND FAILURE MONITORING IN STOPE BASED ON DFOS

    • 摘要: 原生地质体在煤岩层采掘条件下将发生变形破坏,相关物理属性(应变场、渗流场、化学场、温度场、地球物理场)随之改变,为了对变形破坏机理进行精细化分析需对场源特征进行重构反演,因此,亟需一种高灵敏度、性能稳定且分布式的监测系统对上述场源信息进行实时动态监测。基于光纤传感测试技术自身的优点(分布式、稳定性高、抗电磁干扰等),可以弥补常规电阻式和振弦式传感器的不足,能够对采场围岩变形进行动态监测,获得的海量数据体为围岩变形场、应力场的恢复和重构提供支撑。详细介绍了布拉格光纤光栅(FBG)、光时域反射技术(OTDR)、布里渊光时域反射技术(BOTDR)、布里渊光时域分析技术(BOTDA)、布里渊光频域分析技术(BOFDA)的工作原理、优缺点及适用条件,阐述了其在顶底板变形破坏、支承压力、断层活化监测、煤柱稳定性监测及破碎岩体注浆加固稳定性监测等方面的研究进展。分析了分布式光纤传感测试技术在当前研究中存在的问题、研究的热点,指出了后期研究的发展趋势,提出建立井上下一体化多参量信息融合监控预警平台,构建多相多场融合判别技术体系,为透明化智慧矿山建设提供数据支撑。

       

      Abstract: The deformation and failure of the original geological mass can occur under the condition of coal and rock excavation, and the related physical properties (strain field, seepage field, chemical field, temperature field, geophysical field) can change accordingly. To analyze the deformation and failure mechanism in detail, it is necessary to reconstruct and invert the field source characteristics. Therefore, there is an urgent need for a high sensitivity, stable performance and distributed monitoring system for real-time dynamic monitoring of the above field source information. Based on the advantages of optical fiber sensing technology (distributed, high stability, anti electromagnetic interference, etc.), it can make up for the shortcomings of conventional resistance and vibrating wire sensors. This paper points out that it can dynamically monitor the deformation of the surrounding rock in the stope, and the massive data volume obtained can provide support for the recovery and reconstruction of the deformation field and stress field of the surrounding rock. The working principles, advantages, disadvantages and applicable conditions of fiber Bragg grating (FBG), optical time-domain reflectometer (OTDR), Brillouin optical time-domain reflectometer (BOTDR), Brillouin optical time-domain analysis (BOTDA) and Brillouin optical frequency domain analysis (BOFDA) are introduced in detail. The research progress of this technique in deformation and failure of roof and floor, abutment pressure, fault activation monitoring, stability monitoring of coal pillar and stability monitoring of grouting reinforcement of broken rock mass is described. This paper analyzes the existing problems and research hotspots of distributed fiber optic sensing (DFOS) test technology in the current research, and points out the development trend of later research. The main development directions include: (1)Research on the mechanism of rock deformation and instability and mutual feed of optical fiber data volume; (2)Research on coupling performance of optical fiber and rock mass; (3)Data visualization processing and simulation software research; (4)Research on optical fiber monitoring characterization method of rock deformation and failure; (5)Research on applicability of optical fiber for large deformation monitoring in mines; (6)Construction of multi-phase and multi field coupling monitoring system; (7)Construction of monitoring and early warning platform based on multi parameter information fusion of ground and underground integration. The related research is expected to provide reference for the transparent geology of coal mine and intelligent mining.

       

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