MICROMINE Blog - Scanning and Vectorising Old Mine Drawings and Maps - Part 1 & 2

Hi Frank, I did this exercise in Micromine using an Imperial scale and then converting to metric for the whole of CML7 at Broken Hill which lies between Perilya's north and south operations in 2001. I used the old survey plans and even digitised the drill hole as strings then converted them to drill hole later on when I got the full details from old ledgers found in the archives next to the No 4 Shaft. The biggest problem was to get the RL's correct for all the various levels for all the different shafts, which were originally different operations.
The gradient on the main 1480' Level haulage drill caused me some problems but the RL's on the 'backs' and the use of a standard drive profile gave me the details I required. The final void model was something! It has been proven to be substantially correct when they declined into the Western Mineralisation and linked up with the old workings. Found an error in the MMM's surveying around the Kintore Pit but with Paul Hooykas' help and the Bowditch function in Micromine Survey functions was able to sort it out and correct the problem. Well done Micromine yet again. Thanks for the good article. Cheers Peter

Thanks for your kind words, Peter. Sounds like you had a lot of fun acquiring the data back then ... I'm glad we were able to help!

Parts 3 and 4 of this blog series will get to the real meat of the workflow, so stay tuned for the next (hopefully) exciting update.

Cheers,

Frank