Mineworking Appraisals

Shallow and surface/opencast workings can be resultant from extraction of various materials including Coal, Ironstone, Fireclay, Limestone, Chalk, Clay, Aggregates & metal ores. Where the potential for shallow mineworkings or surface/opencast extraction is identified during a desk study, this normally requires additional more detailed research. This includes a detailed geological assessment based on large-scale geological maps, and a review of data held by the British Geological Survey, Mining Remediation Authority [Abandonment Plans] and/or Local Authority. Following on from this, the Phase II physical investigation can be appropriately designed to incorporate the needs of the mining investigation, alongside other routine geotechnical and environmental requirements.

Where a risk of shallow underground mineworkings is identified, a programme of drilling using rotary techniques is normally required to establish the nature of the Superficial and Solid geology and determine the presence, extent and potential risk posed by any workings. Dependent on the specifics of the site, other more innovative techniques may also be appropriate, including geophysics and down-hole camera surveys. Once a sufficient understanding of the ground has been established, an assessment of the potential for future surficial movement and collapse can be undertaken and the need for treatment or remedial measures identified based on detailed site proposals.

Applied Geology has extensive experience in the investigation, assessment and treatment of shallow mineworkings and shafts, to include the specification of drilling and grouting programmes, site supervision and validation. Applied Geology also has extensive experience in developing foundation solutions for the treatment & ground improvement of backfilled former opencast and surface workings.