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ENGINEERING JOURNAL CHIANG MAI UNIVERSITY


Volume 26, No. 01, Month APRIL, Year 2019, Pages 59 - 79


Accuracy assessment of survey methods for volume determination of overburden and coal excavations in large open pit mines

Boonyarit Keawaram and Puttipol Dumrongchai


Abstract Download PDF

This study aims to evaluate the accuracy of real time kinematic (RTK) GNSS and terrestrial laser scanner (TLS) for measuring the volume of excavated overburden and coal in large open-pit mines, in comparison with a conventional method using a total station. The studies were conducted in two large open-pit mines which included Mae Moh mine, Thailand, and Hongsa mine, Lao People’s Democratic Republic. The results from measuring the reference points revealed that a total station exhibited 0.2 mm precision for both horizontal and vertical coordinates, whereas RTK demonstrated 2.5 mm and 3.9 mm precision for horizontal and vertical coordinates, respectively. When using TLS on the same points, the value was 4.93 cm for horizontal coordinate and 0.63 cm for vertical coordinate. In conclusion, measuring the volume by RTK and TLS generated differences about 0.4 and 1.0 percent of the total volume measured by a total station, respectively.


Keywords

GNSS, RTK, Terrestrial Laser Scanner, Total station



ENGINEERING JOURNAL CHIANG MAI UNIVERSITY


Published by : Faculty of Engineering Chiang Mai University
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