Coal mine roadway roof monitoring system based on distributed optical fiber technology
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摘要: 当前巷道顶板变形监测方式为基于井下工业环网的在线实时监测，采用电子式和光纤光栅式的位移传感器并以无线方式连接，存在有较多监测盲点、误差较大、依靠连续供电等问题。针对上述问题，设计了一种基于分布式光纤技术的煤矿巷道顶板监测系统。该系统以布里渊光时域反射计（BOTDR）作为数据采集和分析的核心监测工具，采用5 mm钢绞线光纤作为感测光纤，以锚杆、锚索为固定点布设光缆，通过顶板光纤的应变变化来监测顶板变形状况，实现了对煤矿巷道顶板的实时在线分布式监测。现场应用结果表明，光纤应变变化能够实时准确地反映顶板变形情况，基于光纤应变的顶板监测结果与顶板离层仪监测结果、十字法观测结果一致。用光纤应变表征顶板变形程度消除了人为因素和断电等影响，保证了监测结果的客观性，这种长距离、耐腐蚀、抗干扰、无需供电的分布式光纤应变监测方式为煤矿提供了一种全新的巷道监测手段。Abstract: At present, roadway roof deformation monitoring method adopts on-line real-time monitoring based on underground industrial ring network, electronic and fiber Bragg grating displacement sensors which are connected by wireless means, has many blind spots, large errors, and relies on continuous power supply. For the above problems, coal mine roadway roof monitoring system based on distributed optical fiber technology was designed. The system uses Brillouin optical time domain reflectometer (BOTDR) as the core monitoring tool for data collection and analysis. It uses 5 mm stranded steal optical fiber as sensing fiber, and uses anchor rod and anchor cable as fixed points to lay optical cable. The strain of the optical fiber is used to monitor deformation of the roof, and the real-time online distributed monitoring of the roof of the coal mine roadway is realized. Field application results show that the fiber strain change can accurately reflect roof deformation in real time,the roof monitoring results based on fiber strain are consistent with the monitoring results of the roof delamination instrument and the cross method. Using fiber optic strain to characterize roof deformation eliminates human factors and power outages, and ensures objectivity of the monitoring results. The power-free distributed optical fiber strain monitoring method with long-distance, good corrosion-resistant and anti-interference performance provides a new way of roadway monitoring for coal mine.
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期刊类型引用(11)
1. 周洋. 矿井瓦斯抽采技术优化及经济效益评估. 化工管理. 2024(36): 93-96 . 
百度学术
2. 汪凤祥，齐义庆，王磊，郝昱博. 盲巷贯通前瓦斯排放新技术实践——钻孔“压风抽采”法. 价值工程. 2023(15): 110-112 . 百度学术
3. 张明杰，邓文博，谭志宏，唐开敏，江山，尚志坚. 煤层顶板裂隙带空间网状结构滤纯甲烷研究. 煤炭科学技术. 2023(S1): 96-103 . 百度学术
4. 刘秋生，孙江. 采煤工作面瓦斯抽采技术研究. 内蒙古煤炭经济. 2022(03): 16-18 . 百度学术
5. 段宏飞. 长距离定向钻孔大区域瓦斯治理技术及应用标准. 中国石油和化工标准与质量. 2022(11): 160-162 . 百度学术
6. 王建勤. 长距离定向钻孔大区域瓦斯治理技术及应用标准. 中国石油和化工标准与质量. 2022(12): 167-169 . 百度学术
7. 温英明，张朝阳，雷文杰. 中深孔定向钻进技术及煤矿中分支孔应用研究. 煤炭技术. 2022(07): 37-41 . 百度学术
8. 谭帅. 煤矿井下定向钻进技术在矿井地质勘探中的应用. 内蒙古煤炭经济. 2022(06): 172-174 . 百度学术
9. 冯鹏. 定向钻孔在高位瓦斯抽采中的应用. 当代化工研究. 2021(07): 69-70 . 百度学术
10. 闫循强. 煤矿瓦斯抽采技术的发展探究. 内蒙古煤炭经济. 2021(12): 57-58 . 百度学术
11. 梁道富，曹建明，代茂，褚志伟，张垒. 贵州青龙煤矿碎软煤层区域瓦斯递进式抽采技术. 煤田地质与勘探. 2020(05): 48-52 . 百度学术
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