Abstract

RINCON-DURAN, Juan David  and  MOLINA-ESCOBAR, Jorge Martin. Improvement of the breakage through the drilling deviations control, case “El Roble” mine, Colombia. Bol. cienc. tierra [online]. 2017, n.42, pp.45-54. ISSN 0120-3630.  https://doi.org/10.15446/rbct.n42.59771.

In the unitary operation of drilling and blasting it is very frequent that errors associated with deviations from exploitation works occur. Errors such as improper positioning of the jumbo arm, little parallelism between perforations, irregular lengths of the holes and poor symmetry of the mining front, allow blasting to be inefficient. Thus, from the data measured at the “El Roble” mine, located in Chocó, there is an associated improvement in the use of tools such as magnetic inclinometer, the use of PVC guide tubes, the 5 m flexometer and the rigorous layout of the Mesh of drilling in the front, to assure the slope of the exploitation work and to reduce the deviations. In this way the progress of the exploitation work are improved above 90%, recovering lost tons by 90.2% and reducing costs per meter of advance by 13% is improved.

Keywords : Drilling; deviations; blasting..

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