输电杆塔下采空区电法探测电极系统设计

doi:10.11720/wtyht.2020.1338

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摘要

采空区极易造成地面沉降威胁电网运行安全,检测地下采空区分布意义重大。传统采空区电法检测技术系统控制复杂,布线方式繁琐,所需传感器和电缆数量较多,测量数据量大,排布和移动测量效率低下,并不适合电力领域防控地下采空区危害使用。文中针对电力杆塔下采空区分布的特点,设计了采空区电法检测的电极系统,采用集中-—分布式检测方式,可有效减少电力杆塔下采空区检测的传感器和线缆数量,优化系统控制,精简有效检测数据量,提高采空区检测的效率。

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	张来福
	李士强
	刘国强
	杨虹
	田赟
	李国栋

关键词 ：采空区检测, 电法探测, 电极控制, 测线排布

Abstract：

Goaf tends to cause land subsidence and threaten the safety of power grid operation. It is of great significance to detect the distribution of underground goaf. Traditional goaf electrical detection technology has complex control system and complicated survey line arrangement, needs many sensors and cables as well as large amounts of measurement data, and is characterized by inefficient layout and mobile measurement, and hence it is not suitable for the use of electric power field to prevent and control the hazards of underground goaf. In view of the distribution characteristics of goaf under power pole and tower, the authors designed an electrode system for goaf electrical detection. The centralized-istributed detection method can effectively reduce the number of sensors and cables for goaf detection under power pole and tower, optimize the system control, simplify the effective detection data and improve the efficiency of goaf detection.

Key words： goaf detection electrical detection technology electrode system survey line

收稿日期: 2019-06-26 出版日期: 2020-03-03

TM933

基金资助:国家电网公司科学技术项目(52053016000X);国家自然科学基金项目(51677181)

通讯作者: 李士强

作者简介: 张来福(1967-),男,工学博士,正高级工程师,研究方向为电力设备检测与成像。Email: zhanglaifu479@163.com

引用本文:

张来福, 李士强, 刘国强, 杨虹, 田赟, 李国栋. 输电杆塔下采空区电法探测电极系统设计[J]. 物探与化探, 2020, 44(1): 220-225.
Lai-Fu ZHANG, Shi-Qiang LI, Guo-Qiang LIU, Hong YANG, Yun TIAN, Guo-Dong LI. The design of electrode system for electrical detection of goaf under transmission tower. Geophysical and Geochemical Exploration, 2020, 44(1): 220-225.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2020.1338 或 https://www.wutanyuhuatan.com/CN/Y2020/V44/I1/220

Fig.1 四电极电法检测原理

Fig.2 输电杆塔下采空区检测问题

Fig.3 检测电极布置示意

Fig.4 电极系统原理框图

Fig.5 控制单元工作流程

Fig.6 测线选择单元的工作流程

Fig.7 继电器开关电路原理

Fig.8 锁存器结合译码器电路

Fig.9 电极控制箱

Fig.10 实验电阻网络

Fig.11 电阻网络测试结果示意

Fig.12 野外实验仪器

Fig.13 地下管道分布的二维剖面

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