DESCRIPTION

CONYMET, presents a study to measure the geologic conditions of a mine, this load cone' distribution and volume study shows 10 trucks Dresser of 240 tons (short), with the purpose' of obtaining enough data about the real performance and behavior of the dump bodies, their' fill coefficient and the average volume and tonnage transported.

The system used to achieve the proposed objectives, was that of the Photometric multi - image,' this way a series of images of high quality obtained by means of metric cameras are analyzed' (Rolleiflex 6006), located in alternative form with the picture objective. The photo is revealed' and digitized, for later on to be guided low specialized software CDW (Close Digital Range' Workstation) generating a cloud of topographical points based on the system of coordinates' that is required, being possible to trace also lines in their true dimension and location in the' three-dimensional (3D) space, with precision's that vary among 2 & 4mm by every obtained' point.

The big advantages that this system presents are its speed, the non interruption of the productive' process and the high degree of attainable information. For that Conymet decided to apply it' in at least 10 trucks in operation and one in maintenance that would serve as Dump Body' model (or base) when it change its aspect with the deformations characteristic of the productive' process. This Dump Body model (fig. N°1) it was lifted by means of the taking of 10 pictures' entered an orientation model where each point that is observed is transferred from a Conical' projection (like in the picture) to a projection three-dimensional orthogonal, being obtained' its model in scale 1:1.

Once calculated the size the interior of the Dump Body (tray), it is assigned a particular and own system of coordinates, which would serve as initial reference for all the other Dump Bodies in operation, at the same time it proceeded to the properly calculation such volumetric, assuming a closed box, it was divided in 5 sections to the long thing in which it was defined their area and it is multiplied the distance between section and section, discounting the corners and portion of the line that it falls outside of the concept of the cone SAE 2:1

The following work consisted on the photographic taking of 10 trucks in operation, as it is appreciated in the figure N°2, which were tied to the system of coordinated previously obtained and in which you proceeded to locate a cloud of representative points of the properly such load with the intention of cubing it, that which one carries out following the same method used for the volumetric calculate of the Dump Body base (you cut halfway of the pile). It is necessary to point out that the operation of taking photographic measurements takes no longer than one hour for the entirety of the trucks.