Mining and void related subsidence
GWP has a well established reputation for its understanding of the effects of both abandoned and active underground excavations on surface structures and mineral workings. Much of this experience is pertinent to built development and advice is regularly sought by developers, local and national government as well as by mining and quarry companies.
A wide range of mineral types and methods of underground working have been investigated, and the firm has developed its own in-house computer programs to assess subsidence, strains and tilts.
Services provided include:
- research of mining and geological records;
- site investigation of workings and mine entrances by drilling, geologging and other techniques;
- computation of subsidence strains and tilts including numerical analysis of related ground movements and fissuring;
- subsidence prediction and back analysis of slope failures and design of remedial measures;
- advice on subsurface control measures including grouting and backfilling;
- assessment of impacts on surface mineral workings;
- advice on subsidence avoidance or control.