Open Hole Rotary Drilling – Yorkshire
The desk based coal mining risk assessment identified the potential for shallow coal mining at the site. The LK Group was asked to scope a site investigation, to ascertain the presence of voids or loss in flush, which would indicate worked seams or broken strata.
Open Hole Rotary Drilling
Informed on the necessity of grout
We carried out a programme of rotary open hole boring in the areas of concern to circa 40mbgl. Strata was logged to BS5930. Loss of flush was noted in a number of locations, indicating the likely presence of worked seams.
Information that we provided to the client informed the necessity to grout within the footprint of the proposed buildings.