Bath Stone Mines

My last nights picture of the worksite at Firs Field Combe Down in Bath, where preparations are being made to infill the 20 hectare site of old Bath stone mines.
The mines, which have had roof falls in the past will be stabilised mainly by infilling with a foam concrete mix plus aggregate limestone in water sensitive areas.
Archaeologically important areas will be filled with sand and bat habitats will be protected. The foam will be pumped in under pressure, filling the voids and bonding with the stone, and then set hard to provide a firm foundation and support.
When the infilling starts they will be pumping an average of 1,000m3 of concrete per day.
More mine pictures Here