Just received a call from John at [the mine] and he wanted to pass on his gratitude for our efforts over the past few weeks! He went on to say you guys were outstanding to work with and he learned a great deal about this challenging and dynamic environment. Based on our your efforts, they are now moving back into this area to mine this high grade ore. Good job gang, and appreciate your team’s efforts. Please pass our appreciation to your crew.
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.