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BlastWeb Case Studies

DetNet’s BlastWeb and SmartDet Used for Gautrain Project

Application:15 Kilometres of underground tunnels excavated under sensitive, built up areas in and around Johannesburg CBD. There were also time and environmental impact constraints associated with blasting. In some instances blasting had to take place as shallow as 15m below the surface.

Location: Gauteng, South Africa

Product: DetNet’s BlastWeb  / SmartDet Electronic Delay Detonators

Solution: Bombela Civils Joint Venture, part of the Bombela Group, is responsible for the design, build, part finance, and marketing of the system for a 20 year period. Bombela CJV is responsible for the design and implementation of the civil works component of the Rapid Rail Link. AEL Mining Services was awarded the tunnelling explosives and initiating systems supply contract, offering two market leading technologies. These included BlastWeb / SmartDet(designed by DetNet), which are robust, flexible and user friendly initiating systems and R100G, which is a safe and efficient Underground Pumpable Bulk Emulsion explosive.

The tunnelling route includes 4 stations and 7 emergency shafts varying from 6 to 21m in diameter and depths between 35 to 90m. Considering the majority of the Gautrain stations being situated in close proximity to high value properties such as Sandton and Rosebank, the initiation and blasting system had to minimise air blast and ground vibrations. The blasting was executed with minimal interruption to business and residential areas.

The blasting and tunnelling has been done through two different rock formations, namely Granite and Witwatersrand, a heterogeneous ground composed alternatively of quartzite, siltstone, shales and andesites in various degrees of weathering. To minimise air blast and vibrations, SmartDet, DetNet’s fully programmable electronic initiating system, was used for the shaft sinking and the BlastWeb for the tunnelling.

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Our Products

DetNet has designed, developed and commercialized a reliable and robust range of electronic detonators, control equipment and software to ensure that its technologies continually deliver tangible value to mining operations around the globe.

Currently DetNet offers seven product lines, namely: DigiShot; DigiShot Plus; HotShot; BlastWeb; SmartShotViewShot and GeoShot.

These products allow users to choose the appropriate mix of flexibility, features and value in their electronic initiation system that most suit their needs.

The product offering includes:

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SmartShotThe SmartShot electronic initiation system is a fully programmable and innovative advance in technology, enabling users to achieve accurate timing benefits

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GeoShotThe GeoShot™ Seismic electronic initiation system provides an electronic solution for seismic applications where highly accurate timing, positional information, quick deployment  and robust downline wires are required.

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QuickShotThe BlastWeb Electronic Initiation system is designed for underground use in all applications. BlastWeb is capable of initiating various types of detonators.

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ViewShotThe ViewShot blast design software package allows blasting plans to be designed and simulated on a computer that can be directly downloaded into the control equipment which enables the user to save substantial time during the blasting process

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DigiShotDigiShot is an easy to use, reliable electronic initiating system for use primarily on small surface blasting applications.

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DigiShot PlusDigiShot Plus is an easy to use, reliable electronic initiating system for use primarily on medium to large mines, where large blasting and remote firing are required.

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