Flow tracking in block caving mining

G - Physics – 01 – B

Patent

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G01B 7/14 (2006.01) G01V 3/26 (2006.01)

Patent

CA 2667201

The invention provides a method and system for monitoring the flow of ore in block cave mining operations by inserting an active magnetic transponder 1 into the ore body 12 and generating an alternating magnetic signal with the transponder 1. The ore is monitored with a magnetometer (14, 15, 16, 17, 18) to detect the magnetic flux emitted by the transponder 1 thereby determining the position of the transponder. Successive recordings of the position of the magnetic transponder are taken as it moves along with the ore as it "caves". In this way, the flow patterns of the ore may be revealed.

Cette invention concerne un procédé et un système pour surveiller l'écoulement d'un minerai dans des opérations d'extraction par foudroyage par blocs en introduisant un transpondeur magnétique actif (1) dans le corps (12) du minerai et en produisant un signal magnétique alternatif avec le transpondeur (1). Le minerai est surveillé avec un magnétomètre (14, 15, 16, 17, 18) de manière à détecter le flux magnétique émis par le transpondeur (1), ce qui permet de déterminer la position du transpondeur. Des enregistrements successifs de la position du transpondeur magnétique sont saisis au fur et à mesure de sa progression conjointement avec le minerai pendant que celui-ci "s'effondre". Ainsi, la configuration de l'écoulement du minerai peut être révelée.

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