Mine Workings and Mine Shaft Treatment
We have been involved in drilling & grouting shallow mine workings for over 40 years. Forkers are considered a specialist in this field and we are in the unique position of being able to resource large mine workings stabilisation schemes from our in-house resources.
- Drilling & grouting shallow coal, ironstone, limestone, chalk, sandstone and fireclay workings
- Using rotary percussive steel casing drilled to rockhead or to full hole depth if necessary to ensure hole integrity
- Drilling with water flush as standard
- Grouting collapsed workings with pfa/cement grout, sand/cement grout, clay (bentonite) based grouts and use of thixotropic or polymeric additives
- Completing major shallow coal workings treatment contracts with over 10,000 drill holes, up to 250,000 tonnes of grout and resourcing up to 20 rigs
- Creation of perimeter barriers to treatment grids in open or collapsed workings
- Locate and treat mine shafts up to 1000m deep including; probing, filling open shafts with granular material, stage grouting, grout caps and reinforced concrete caps
- Fully designed shaft drilling platforms
- We also have a wide range of bespoke grout mixing and pumping plant much of which is designed and manufactured in-house;
- Grout mixing equipment from 0.5m3 including high shear mixers for clay based grouts
- Continuous grout batching plants with outputs of up to 150m3/hr used for central batching on large mine workings treatment sites ensuring control of deliveries, quality, and environmental risks, reduction of material storage and access requirements
- Mobile grout agitation/pumping units which can be strategically placed or moved as work proceeds, capacity up to 9m3
- Full range of grout pumps including Gardner-Denver duplex pumps, screed pumps, diaphragm pumps and trailer mounted concrete pumps