Monitoring subsidence of open pit mine slope based on GNSS/CORS technology - case study at the Coc Sau open-pit coal mine

  • Affiliations:

    1 ThuyLoi University - Second campus, HoChiMinh City, Vietnam
    2 Hanoi University of Mining and Geology, Hanoi, Vietnam
    3 Dong Hai Surveying Company Limited, Vietnam

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  • Received: 15th-Jan-2024
  • Revised: 1st-May-2024
  • Accepted: 23rd-May-2024
  • Online: 1st-June-2024
Pages: 109 - 122
Views: 372
Downloads: 4
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Subsidence value is one of the important parameters to evaluate the stability of open pit mine slope. The subsidence is determined from height values measured at different times using different methods and equipment. When applying GNSS/CORS technology to monitor displacement, landslides, ground subsidence or structures, a specialized monitoring system is needed to ensure the necessary accuracy. This article presents the results of research on subsidence monitoring of open pit mine slope based on CORS technology and a self-developed GNSS receiver. The CORS station is set up with Trimble's Zyphir 2 Geodetic antenna and Stonex GNSS receiver located in Cam Pha city, Quang Ninh. The GNSS receiver for monitoring station is designed and developed based on the Trimble's GNSS BD970 board and integrated with a 4G wifi modem, allowing the transmission of monitoring data in standard NMEA0183 format to the CORS station's host computer. Decoded monitoring data and error filtering have improved the accuracy of height determination achieved at the mm level. Results of simulation experiments and experiments with actual monitoring data at Coc Sau coal mine, Cam Pha, Quang Ninh have proven the effectiveness and reliability of the method. With simulated experimental monitoring results, it shows that the largest subsidence difference is 16 mm and the smallest is 6 mm.

How to Cite
Nguyen, H.Van, Pham, K.Cong, Vo, D.Ngoc, Dinh, T.Thanh and Pham, C.Van 2024. Monitoring subsidence of open pit mine slope based on GNSS/CORS technology - case study at the Coc Sau open-pit coal mine (in Vietnamese). Journal of Mining and Earth Sciences. 65, 3 (Jun, 2024), 109-122. DOI:

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