A-PRIORI ACCURACY ASSESSMENT OF TRACING THE CUT-TROUGH IN THE VERTICAL PLANE DURING THE CONSTRUCTION OF THE HOULAGE DRIFT IN THE ''GROT'' MINE

Abstract

Mining projects for the exploitation of the grade ores encompass specific technical and technological solutions that are a consequence of the characteristic spatial position and geometry of the ore deposit, existing mining works, natural and artificial objects, and terrain relief. To realize the mining project, a series of mining and surveying tasks must be carried out in the pre-project and project phases of exploitation, as well as during the construction of mine facilities and the excavation of mineral materials. Among the various mining and surveying tasks that follow project implementation, the tracing of the cut-through or cross-cuts, between existing mine tasks is often a crucial step. For the successful execution of these tasks, it is necessary to perform an a priori assessment of the accuracy of the cut-through in order to define the required precision for the measurement/monitoring process, and based on that, determine the appropriate ecqiupment and measurement method. This paper presents an a priori assessment of the accuracy of marking the cut-through in the vertical plane during the construction of the houlage drift on the IX horizon of the "Grot" lead and zinc mine.