Inspections and surveys of dry open voids-Prometheus R&D

There are over 5000 recorded and numerous other unrecorded locations across the network where shallow mine workings may constitute a risk to the operation of the railway. The primary risk relates to the collapse of shallow workings causing subsidence at the surface that has the potential to damage railway assets including track possibly resulting in derailment. To manage the risks posed by shallow mine workings it is necessary to understand both the extent and condition of the workings. Only a small percentage of t...