DEFORMATION MONITORING AT WALL AND ROOF TUNNEL OF UNDERGROUND GOLD MINING USING TOTAL STATION REFLECTORLESS
Abstract
Deformation measurements using the reflectorless total station is one method that is being developed to ease monitoring activities of the underground mine tunnel that have large enough dimensions, difficult to reach by other monitoring equipment and mining activities can hinder collecting monitoring data.
This study observe the value, direction and rate of deformation on the walls and roof of active silldrift which is considered to have a huge loading due to the influence of silldrift above at the level, that have partly was backfill with concrete reinforcement on the floor and some still hollow. The observation sill drift have supporting system by a combination of friction bolt, weld mesh and shotcrete.
Deformation measurements method uses the basic principle for determining the
coordinates of a point with two point belt.The amount of deformation can be calculated
from the difference in the coordinates of each of observational data at the time of
measurements, the direction of deformation calculated using trigonometry method, and
taking into account the duration of the measurement interval then the rate of deformation
can be predicted. The results of the analysis of the resultant cumulative deformation that
occurs very large with an average of 218 mm with the resultant trend revolves around the
direction Y105o - 288oX and plunge ranges between 36o - 79o . The average rate of
deformation 20mm/day.
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References
Mining and Metallurgy, London.
Sullem, J. Panet, M and Guenot, A. A New Aspect in Tunnel Closure
Interpretations, 26-th US Symposium on Rock Mechanics. South Dakota Scool of Mines and Technology. Rapid City, AD. 26-28 June 1985, pages : 455-460.
Pan, Y.W and Dong, J.J., Time Dependent Tunnel Convergence-I Formulation of
the Model. Jounal of Rock Mechanics and Mining Science, Volume 28 No.6 halaman pages (1991).
Tingay M, dkk. (2010) Present-day stress field of Southeast Asia, Tectonophysics, 482, pp 92-104.
Cording J. Edward., Mahar W. James. and Brierley S. Gray., Observations for
Shallow Chamber in Rock. Proceedings of The International Symposium Field Measurements in Rock Mechanics. Volume II. Zurich, 4-6 April 1977. AA. Balkema, Rotterdam, halaman 485-508 (1979).
Zhenxiang, X. A. Tunnel Design Method Using Field Measurement Data.
Proceeedings of ISRM Symposium Design and Performance of Underground Excavation. Cambridge UK, 3-6 September, 1984. British Geotechnical Society, London. Halaman 221-229.