立井井壁变形光纤光栅远程实时监测预警系统
Remote real-time monitoring and early warning system for shaft wall deformation by fiber bragg grating
-
摘要: 针对高寒矿区表土层冻融作用和含水层水压力引起的井壁变形问题,基于光纤光栅传感原理,沿井壁环向和竖向安装了10层光纤光栅应变和温度传感器,提出了井壁结构损伤识别方法,确定了混凝土结构变形破坏阈值,建立了立井井壁变形远程实时监测系统。经1年的高寒矿区灵东煤矿副井井壁监测结果表明:井壁变形光纤光栅监测系统能够实时监测预警、高寒地区长期稳定性好,井壁最大环向应变和轴向应变均低于混凝土屈服强度阈值,说明井壁目前处于稳定阶段。Abstract: Aiming at the deformation and fracture of shaft wall caused by freezing and thawing of topsoil and water pressure of aquifer in severe cold mining area, fiber bragg grating strain sensors are installed along the circumferential and longitudinal direction of shaft wall, the damage identification method of shaft wall structure is proposed, the real-time monitoring system of shaft wall deformation is established, and the deformation and failure threshold of concrete structure is determined through the compression test of concrete samples, and the real-time monitoring and early warning of shaft lining structure are realized. The monitoring results of the auxiliary shaft wall of Lingdong Coal Mine in severe cold mining area for nearly a year show that the shaft wall fiber bragg grating monitoring system can monitor in real time, has good stability, good coupling with concrete materials, and is easy to form a sensor monitoring network. The maximum circumferential strain and axial strain of shaft wall are both lower than the yield strength threshold of concrete, indicating that the shaft wall is in a stable stage at present.
-
-
[1] 程桦,林键,姚直书,等.我国西部地区孔隙型含水基岩段立井单层井壁外荷载研究[J].岩石力学与工程学报,2019,38(3):542-550. CHENG Hua, LIN Jian, YAO Zhishu, et al. Study on the external load of a single layer wall of the vertical shaft in the pore type water-bearing bedrock section in Western China[J]. Chinese Journal of Rock Mechanics and Engineering, 2019, 38(3): 542-550.
[2] 刘尚国,杨兴建,郑文华.基于激光准直的深井井筒垂直度检测方法[J].煤矿安全,2019,50(12):123-126. LIU Shangguo, YANG Xingjian, ZHENG Wenhua. Deep shaft verticality detection method based on laser collimation[J]. Safety in Coal Mines, 2019, 50(12): 123-126.
[3] 周晓敏,谢琰珂,李德春,等.磁西副立井超千米单层井壁受力变形实测与分析[J].煤炭学报,2015,40(5):1015-1020. ZHOU Xiaomin, XIE Yanke, LI Dechun, et al. Field monitoring & analysis on the stressing deformation of single layer lining of auxiliary shaft over 1000 m deep in Cixi Colliery[J]. Journal of China Coal Society, 2015, 40(5): 1015-1020.
[4] 黄明利,吴彪,刘化宽,等.基于光纤光栅技术的井壁监测预警系统研究[J].土木工程学报,2015,48(S1):424-428. HUANG Mingli, WU Biao, LIU Huakuan, et al. The development of shaft monitoring and early warning system based on the technology of fiber bragg grating[J]. China Civil Engineering Journal, 2015, 48(S1): 424-428.
[5] 杨金宏,朱启银.线型光纤光栅传感技术在立井井壁竖向变形监测中的应用[J].建井技术,2021,42(6):33-37. YANG Jinhong, ZHU Qiyin. Application of linear optical fiber and optical grating sensing technology to vertical deformation monitoring of mine shaft liner[J]. Mine Construction Technology, 2021, 42(6): 33-37.
[6] 王太元,王侃.光纤光栅技术在井壁融化期间变形监测中的应用[J].煤矿安全,2016,47(11):162-164. WANG Taiyuan, WANG Kan. Application of fiber bragg grating technology in deformation monitoring of shaft wall melting stage[J]. Safety in Coal Mines, 2016, 47(11): 162-164.
[7] ZHU Honghu, SHI Bin, YAN Junfan, et al. Investigation of the evolutionary process of a reinforced model slope using a fiber-optic monitoring network[J]. Engineering Geology, 2015, 186: 34-43. [8] PIAO Chunde, YUAN Jun, SHI Bin, et al. Application of distributed optical fiber sensing technology in the anomaly detection of shaft lining in grouting[J]. Journal of Sensors, 2015: 678634. [9] GB/T 50081—2019凝土物理力学性能试验方法标准[S]. [10] GB 50010—2010混凝土结构设计规范[S]. -
期刊类型引用(1)
1. 宋成义. 钻井单层井壁可缩结构设计与监测技术研究. 煤炭与化工. 2023(12): 74-77+81 . 百度学术
其他类型引用(1)
计量
- 文章访问数: 28
- HTML全文浏览量: 0
- PDF下载量: 19
- 被引次数: 2