Scholarly record
A POSTERIORI ASSESSMENT OF THE MEASUREMENTS ACCURACY WITH BOREHOLE INCLINOMETERS AT THE TAILINGS DAM OF THE ERDENET MINING CORPORATION
Abstract
Object. Measurements via borehole inclinometers have been actively used in geotechnical monitoring for more than forty years. Due to the high sensitivity of MEMS sensors to external factors, the passport accuracy characteristics of such equipment are significantly underestimated. At the same time, the analysis and interpretation of data obtained by inclinometers measurements are associated with an assessment of these measurements quality. Identifying the random and systematic components of the total error is the key to improving the efficiency of the inclinometers data interpretation. The study used field measurements of a borehole inclinometer carried out on the tailings dam of The Erdenet Mining Corporation, Mongolia. Research Methods. The research tool is the mathematical device for assessing the mean square error as a complex function. The work analyzed two types of RMS functions: a linear function and a nonlinear one. A modified Gauss-Newton algorithm was used as an optimization method. Results. The calculations performed on a computer showed the fast convergence of the optimization algorithm proposed. The actual values of the total measurement error with the borehole inclinometer turned out to be significantly lower than the passport values. Conclusion. The article calculates the corrected values of the random and systematic components of the measurement error with a borehole inclinometer at the tailings dam of The Erdenet Mining Corporation. The new assessments improve the quality of both the analysis of the existing displacements within the dam body and the quality of the preliminary design calculation of the inclinometric measurements accuracy.
Publication Impact Profile
Publication details
References7
Mikkelsen P. E. and Wilson S. D., Field Instrumentation: Accuracy, Performance, Automation, and Procurement In Proceedings, International Symposium on Field Measurements in Geomechanics, Vol. 1 (K. Kovari, ed.), A. A. Balkema, Rotterdam, The Netherlands, 1983, pp. 251 272.
Mikkelsen P. E., Advances in inclinometer data analysis’, in F Myrvoll (ed.), Proceedings of the 6th International Symposium on Field Measurements in Geomechanics, A. A. Balkema, Rotterdam, 2003, pp. 555 567.
Mikkelsen P. E. and DiBiagio E., Depth position errors in inclinometer surveys and false displacement results, in PM Dight (ed.), Proceedings of the Ninth Symposium on Field Measurements in Geomechanics, Australian Centre for Geomechanics, Perth, 2015, pp. 117 123.
DGSI Slope indicator. Inclinometer Accuracy - https://durhamgeo.com/resources/tech-notes/inclinometers/inclinometer-accuracy/.
The report on the research work «Kontrol' ustojchivosti damby hvostohranilishcha OF KOO Predpriyatie Erdenet» [«Monitoring the tailings dam stability of Erdenet Mining Corporation»] Supervisor Gordeev V.- Contract 37 207 17 - UrSMU, Ekaterinburg, 2018 - p. 132.
Gordeev V., Ocenka parametrov funkcii srednej kvadraticheskoj oshibki linejnyh izmerenij [Estimation of the function parameters of the mean square error of linear measurements] // MARKSHEJDERSKIJ VESTNIK [Mine Surveying Bulletin], №4, 1995 - pp. 12 14.
Gordeev V.A., Teoriya oshibok izmereniya i uravnitel'nye vychisleniya [The theory of measurement errors and equalization], Book 2nd ed., Rev. and additional, Russia, Ekaterinburg, UrSMU, 2004 – p. 429.
View or Download full articleAccess options
SWS access login
Login as SWS Scientific CommitteeLogin as SWS Scientific PartnerLogin as SWS AuthorAuthors and approved SWS contributors will read and export their own linked papers after identity matching by SWS profile, email and SGEM GlobalID.
For librarian assistance: [email protected]
Purchase Instant Access
- Article can be downloaded after successful payment.
- Article may be used according to SWS library access terms.
- Article cannot be redistributed.