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Experimental study on distributed optical fiber sensing monitoring for ground surface deformation in extra-thick coal seam mining under ultra- thick conglomerate

机译：超厚砾岩超厚煤层地表变形分布式光纤传感监测实验研究

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摘要

The purpose of this paper is to study the law of ground surface movement and deformation in deep and extra-thick coal seam mining under ultra-thick conglomerate. With the engineering geological conditions of Qianqiu Coal Mine as the background, the three-dimensional model with the size of 3600 mm x 2000 mm x 2000 mm (length x width x height) was constructed. The distributed optical fiber sensing monitoring network is set up in the model. The optical fiber sensing signal is collected in real time by NBX-6055 demodulator to characterize the surface movement and deformation. Then based on the Mohr-Coulomb criterion, the numerical calculation model is established by using UDEC 6.0 software to explore the internal relationship between overburden and surface movement and deformation in the process of coal mining. The test results show that the distributed optical fiber monitoring technology can effectively capture the movement and deformation of ground surface. The optical fiber strain distribution curve can accurately locate the formation area and stress state of surface subsidence basin. The surface is controlled by the key strata of ultra-thick conglomerate, and in the whole process of mining, the surface movement and deformation can be roughly divided into three stages: deformation initiation, slow deformation and sudden deformation. The conclusions indicate that the distributed optical fiber sensing monitoring technology has good applicability in the surface monitoring of model test. It provides a method for the monitoring information research of mining surface movement and deformation.
机译：本文的目的是研究超厚集团公司在深部和超厚煤层开采中地表运动和变形的规律。以千秋煤矿的工程地质条件为背景，构建了尺寸为3600mm×2000mm×2000mm（长×宽×高）的三维模型。模型中建立了分布式光纤传感监控网络。 NBX-6055解调器实时收集光纤传感信号，以表征表面运动和变形。然后根据Mohr-Coulomb准则，利用UDEC 6.0软件建立了数值计算模型，探讨了开采过程中覆盖层与地表运动和变形之间的内在联系。测试结果表明，分布式光纤监测技术可以有效地捕获地表的运动和变形。光纤应变分布曲线可以准确地定位地面沉降盆地的形成区域和应力状态。地表由超厚砾岩的关键地层控制，在整个开采过程中，地表运动和变形大致可分为三个阶段：变形开始，缓慢变形和突然变形。结论表明，分布式光纤传感监测技术在模型测试的表面监测中具有良好的适用性。为矿山地表运动和变形的监测信息研究提供了一种方法。

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  • 来源
    《Optical fiber technology》 |2019年第12期|102006.1-102006.12|共12页
  • 作者

  • 作者单位

    Xian Univ Sci & Technol Coll Energy Engn Xian 710054 Shaanxi Peoples R China|Xian Univ Sci & Technol Minist Educ Western Min & Mine Disaster Prevent & Control Key Xian 710054 Shaanxi Peoples R China;

    Xian Univ Sci & Technol Coll Energy Engn Xian 710054 Shaanxi Peoples R China|Longdong Univ Sch Energy Engn Qingyang 745000 Gansu Peoples R China;

    Xian Univ Sci & Technol Coll Energy Engn Xian 710054 Shaanxi Peoples R China;

    Chongqing Univ Resource & Environm Sci Coll Chongqing 400044 Peoples R China;

    China Coal Xian Design Engn Co Ltd Xian 710054 Shaanxi Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Three-dimensional model; Ultra-thick conglomerate; Distributed optical fiber sensing technology; Surface movement and deformation; Numerical calculation;

    机译：三维模型;超厚集团分布式光纤传感技术;表面运动和变形;数值计算;

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