durable linings.
Micro and micro- ne cement injection BASF Construction Chemicals ' Injection range includes micro-cement and micro- ne cement, which are used extensively for pre-grouting works prior to excavation.
Other products include the colloidal silica series, which offers excellent penetrability and has no detrimental environmental impacts; and poly-urea-silicates( PUS) rapid setting twocomponent products, which can be used for ground consolidation, void lling and permanent repairs. �e poly-urea( PU) product range includes fastreacting resins that react with water to reduce in ow, and consolidate ground. Acrylate injection products are available in one and twocomponent varieties, and also exhibit good penetrability, forming a exible gel end product suitable for sealing structures prone to movement.
Mine back ll and tailings management Mine back ll products are available to facilitate the reduction of binder and water consumption, while increasing solids content and improving ow characteristics.
�e BASF approach to mine back ll is to thoroughly test material to determine whether the mix can be optimised. Savings can therefore be made through reduced binder content and early strength gain.
Close cooperation between BASF ' s technical team and the Mining Solutions divisions ensures that any proposals compliment to other products used within the system, with regards to mineralogy, mineral processing and tailings management
Spray applied liners �in-sprayed liners( TSLs) are applied to prevent further degradation of the rock strata, as well as the ingress of undesirable gases into the works.
Mechanised tunnel drives Tunnel boring machines( TBMs) use a variety of chemicals from the soil conditioning and abrasion reducing agents at the front of the cutter-head, greases for the bearings, and tailseals, as well as grouts for lling the gap between the excavated ground and the outer edge of the segment.
Workshops and technical support for the mining industry Technical support is provided by key experienced regional personnel, with additional support from the global technical team.
Industry workshops covering key technologies are held throughout the year. Injection events are held four times per annum at the underground test gallery in Hagerbach, Switzerland. Two sprayed concrete workshops are conducted at the same facility. Tailored events can also be arranged for speci c participant groups.
�e workshops are open to customers, and are used to illustrate the various products and demonstrate their application. �ey are held both on a regional and global level. TBM and mine back ll workshops are also held, usually at or near a site utilising those techniques.
BASF recognises that training is a key to ensure that employees maintain their professional and personal development. For select technologies BASF will make available online training modules, which are further supplemented by these workshops.
FMDZ | Sep- Oct 2017 | Page43