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2022 Vol. 33, No. 5
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Article navigation > The Chinese Journal of Geological Hazard and Control > 2022 > 33(5): 93-101
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TANG Zhigang, CAI Chenggang, WANG Yanhong, WEI Guangqing, ZHANG Zhen, JING Jiajun. Monitoring and warning system for ground subsidence of gypsum mine based on fiber sensing[J]. The Chinese Journal of Geological Hazard and Control, 2022, 33(5): 93-101. doi: 10.16031/j.cnki.issn.1003-8035.202108034
Citation: TANG Zhigang, CAI Chenggang, WANG Yanhong, WEI Guangqing, ZHANG Zhen, JING Jiajun. Monitoring and warning system for ground subsidence of gypsum mine based on fiber sensing[J]. The Chinese Journal of Geological Hazard and Control, 2022, 33(5): 93-101. doi: 10.16031/j.cnki.issn.1003-8035.202108034
shu

Monitoring and warning system for ground subsidence of gypsum mine based on fiber sensing

  • 1.

    Party 5 Jiangsu Bureau of Geology and Mineral Resources, Xuzhou, Jiangsu　221004, China

  • 2.

    Jiangsu Bureau of Geology and Mineral Resources, Nanjing, Jiangsu　210018, China

  • 3.

    Nanjing University （Suzhou） High and New Technology Research Institute, Suzhou, Jiangsu　215128, China

Received Date:  31 August 2021
Revised Date:  22 September 2021
Publish Date:  25 October 2022
    Abstract

  • In recent years, the mined-out area resulting in more than 20 goaf collapse disasters in the north Pizhou, Jiangsu Province. The traditional monitoring method of surface soil deformation is difficult to meet the requirement of advance prediction of surface subsidence. In order to solve the lack of monitoring and early warning mechanism of mined-out subsidence in gypsum mining area, a monitoring and early warning system based on fiber sensing technology was developed in this area. According to the results of preliminary investigation, analysis and numerical simulation, the ground collapse mechanism of gypsum mine is deduced, dynamic monitoring of groundwater level, displacement of deep rock and soil mass and microseismic monitoring of bottom aquifer above loose layer were monitored by optical fiber sensor, in the course of monitoring, the alarm will be triggered when the fluctuation of water level and the displacement of rock and soil suddenly exceed the normal fluctuation value or when a strong vibration signal is received, and the effective early warning will be carried out in the early stage of the ground collapse, and can provide adequate lead time for disaster prevention and mitigation efforts. Through the implementation of monitoring and early-warning work, the validity of these monitoring and early-warning means has been verified, which can provide data basis and scientific basis for the monitoring, prediction and prevention of ground subsidence in mining areas, it can also provide reference for prevention, control, monitoring and early warning of ground collapse geological disaster in gypsum mine and other similar conditions.

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