Hey Trevor, I gotta [sic] admit, I was a little worried after our progress on the first day of scaling. I wondered if I’d missed something in analyzing that slope! However, on day two, the guys were able to get the bulk of the loose material down in the two areas I was concerned about. They also installed two prisms into the blocks adjacent to the areas scaled so we can monitor any changes in the slope.
The team who came to site were the epitome of professional, not to mention a lot of fun to work with. There was never any point where I felt they were working unsafely. I am most impressed with the entire operation.
I think we were able to remove 100% of the immediate hazard for that area, and 75-80% of the overall hazard. Job well done!
A variation of karst sinkhole grouting is the grouting of mined coal seams and workings located below existing infrastructure that exhibit the potential to propagate to the surface and cause sinkholes and/or subsidence.