Pan American Silver Shaftlining - Zacatecas, Mexico
In December of 2015 – Pan American Silver was raise boring a 613m deep x 6m ID shaft in Zacatecas Mexico. The upper 210 M was in questionable ground, so it was decided to raise a smaller 3m bore, shotcrete the shaft and then excavate from the top and down.
The day after the bore machine was removed, STI lowered a camera down and marked where 3” shotcrete was needed – a total of 240 LF in various areas.
At 11 am – we started lining a flash coat top to bottom. We then lined 3” of shotcrete where needed and by 6pm, the same day, we had completed the shaft lining - a total of 30 cubic meters was in place!
