Old mines and abandoned quarries


(note: this is an automated translation)

The forgotten or abandoned mines or underground quarries can be an major geological hazard, occuring as an unpredictable risk of sinkhole collapse for example. These old farms or underground refuge and other tunnels are also often a neglected rich heritage.

At NOT Engineers, are are a team of professionnal speleologists and a geologist, able to work with you in dealing with this issue, whether in emergency response on long-term management.

3D survey of an underground quarry
3D survey of an underground room and pillar quarry. More than 140 pillars, 7.4 acres, 7ft pillars

Examples of our work

  • Geophysical prospection,
    • Petrology
    • Cartopgraphy of cracks, fault directions
    • Establishment of geological sections
    • Location of mineralized veins
Suivi d’effondrement - vue en coupe
On voit le confortement construit par l’exploitant de la mine. Il est possible de mesurer le vide qui reste au dessus.
Suivi d’effondrement - Coupe transversale
L’exploitant a réalisé un confortement bétonné de section carré. On voit sur cette vue l’emprise de l’effondrement en cours au delà.
  • Exploration and monitoring of abandoned cavities
    • Topographic survey
    • instrumentation
    • Even in narrow passages (up to 0.40m)
Topographie 3D d’une ancienne carrière souterraine
3 exploitations distinctes visibles sur cette vue. 3 bancs de calcaires ont été exploités sur 10-15m d’épaisseur. Galeries de jonction (rails)
  • Cartography
    • Identification of all geomorphological features
    • Collapses
    • Geology
    • Anthropogenic elements
    • GIS or map output

Related projects :