张平松, 张丹, 孙斌杨, 施斌, 许时昂. 2019: 巷道断面空间岩层变形与破坏演化特征光纤监测研究. 工程地质学报, 27(2): 260-266. DOI: 10.13544/j.cnki.jeg.2018-070
    引用本文: 张平松, 张丹, 孙斌杨, 施斌, 许时昂. 2019: 巷道断面空间岩层变形与破坏演化特征光纤监测研究. 工程地质学报, 27(2): 260-266. DOI: 10.13544/j.cnki.jeg.2018-070
    ZHANG Pingsong, ZHANG Dan, SUN Binyang, SHI Bin, XU Shiang. 2019: OPTICAL FIBER MONITORING TECHNOLOGY FOR EVOLUTION CHARACTERISTIC OF ROCK STRATUM DEFORMATION AND FAILURE IN SPACE OF MINING FIELD. JOURNAL OF ENGINEERING GEOLOGY, 27(2): 260-266. DOI: 10.13544/j.cnki.jeg.2018-070
    Citation: ZHANG Pingsong, ZHANG Dan, SUN Binyang, SHI Bin, XU Shiang. 2019: OPTICAL FIBER MONITORING TECHNOLOGY FOR EVOLUTION CHARACTERISTIC OF ROCK STRATUM DEFORMATION AND FAILURE IN SPACE OF MINING FIELD. JOURNAL OF ENGINEERING GEOLOGY, 27(2): 260-266. DOI: 10.13544/j.cnki.jeg.2018-070

    巷道断面空间岩层变形与破坏演化特征光纤监测研究

    OPTICAL FIBER MONITORING TECHNOLOGY FOR EVOLUTION CHARACTERISTIC OF ROCK STRATUM DEFORMATION AND FAILURE IN SPACE OF MINING FIELD

    • 摘要: 煤层开采过程中巷道围岩会发生变形、移动与破坏,其动态变化特征对巷道设计、支护等技术参数的选择具有重要的参考意义。论文结合淮南矿区某工作面回采进程,在煤巷中布设测试断面,通过钻孔布置分布式光纤传感器,对煤岩层变形与破坏过程中产生的应变参数进行实测与分析,讨论断面空间岩层变形发育规律及其采动影响特征。井下2个监测钻孔的16组监测数据分析结果表明:工作面回采过程中,底板岩层受采动影响发生变形产生位移特征明显,且受岩层界面控制,变形位置多自层面开始逐渐发育,探查区底板岩层破坏的最大深度达14.1 m,与电阻率CT结果基本一致,且超前应力显现明显,整体监测效果良好。认为分布式光纤测试技术可精确分辨采动作用下岩层的变形演化过程,有利于研究不同条件下岩层受力后发生变形及破裂的规律。

       

      Abstract: The deformation, movement and destroying of the surrounding rock in the laneway can happen during the mining of coal stratum. The dynamic change characteristics have important reference significance to the selection of the technical parameters such as laneway design and support. In the paper, combining the mining process of one working face in Huainan mine area, the testing section is laid in the coal laneway. Through laying the distributed fiber sensors in the drill hole, the strain parameters of rock stratum can be detected and analyzed during the deformation and failure processing of coal and rock strata. The law of deformation development of rock stratum in the section space and characteristics affected by mining can be discussed. The analysis results through the 16 groups monitoring data from 2 monitoring drill hole indicate that the producing shifting characteristics affected by mining in the floor rock stratum are obvious during the mining process of working face, and the development of the deformation locations often start from bedding plane because of interface control of rock stratum. The maximum deformation depth of the floor rock stratum is 14.1 m in the detection field, the results are basically consistent with the resistivity CT, and its appearing ahead of stress is very clear. All of the monitoring effect is well. The distributed fiber testing technology can be used as an effective method to distinguish accurately the evolutionary process of rock stratum deformation. It can make for studying deformation and destroy rules of rock stratum after stress in different conditions.

       

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