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APPLICATION OF TOTAL STATION AND LASER IN CORRELATION SURVEY AND DEPTH MEASUREMENT IN AN UNDERGROUND MINE SHAFT

Abstract The present paper describes a case-history of an application of modern surveying instruments in the correlation survey and depth measurement in a 400 m deep vertical underground mine shaft sunk from a depth of about 500 m to a depth of 900 m below the ground level (Fig. 1). The technique presently used differs from other earlier techniques in that the depth is measured directly at various horizons in the shaft, from bottom to top, by using a total station.