The history of DSI Underground dates back to 1865 - the foundation of the Dyckerhoff & Widmann AG based in Karlsruhe, Germany.
In the 1970s, the first DSI companies were founded to distribute the know-how of Dyckerhoff & Widmann AG internationally. In 2000, the DSI network consisted of more than 50 subsidiaries, licensees and agents.
DSI acquires ANI Strata Products and establishes a new business in the underground mining industry as well as in Australia
DSI opens new facility for mining products in Salt Lake City / USA and in Johannesburg / South Africa
DSI's global network consists of more than 75 subsidiaries, licensees and agents
DSI strengthens its mining business by acquiring Celtite Pty Ltd (Celtite), Australia
DSI acquires Underground companies in North America
DSI acquires Stewart Mining in Canada. This acquisition establishes DSI as the market leader for mining products in Canada
The European private equity firm Industry Kapital acquires DSI
DSI acquires the leading supplier of mining products Mexicana de Anclas Mineras in Zapopan, Jalisco, Mexico
DSI strengthens its tunneling division by acquiring ALWAG Tunnelausbau Ges.m.b.H. in Pasching, Austria
DSI further strengthens its tunneling and mining activities in North America by acquiring the shares of American Commercial Incorporated (ACI), Bristol, VA, USA
DSI USA acquires Fasloc, Inc., a premier producer of Resin Cartridges for mining and tunneling in the USA
DSI expands its mining activities in South America by acquiring Soprofint SA, headquartered in Santiago, Chile
DSI is sold by Industri Kapital to CVC Capital Partners. CVC Capital Partners is a leading international private equity company with a total of 11.6 billion Euros in equity capital
The acquisition of MET-TECH Industries Ltd., USA extends DSI's market leadership in the supply of mining products in North America

DSI supplies special products for Australia's longest road tunnel in Brisbane, Australia. For the construction of the 5,000m long double tunnel, DSI supplies the AT-76 injection system used for the first time in Australia in addition to many other products and systems. The injection system protects the TBM in advance from water damage and ensuing failure
DSI acquires business from AGRHIMERC S.A.C., Peru and establishes DSI Peru S.A.C.
Extension of DSI's market presence in South America by acquisitions
The acquisition of DSI by Triton is closed on June, 15th, 2011. Triton, a highly respected European private equity house, is now the owner of DSI

DSI South Africa strengthens Export Activities in Botswana and Zimbabwe. DSI is one of the largest and leading producers of products and systems for mining in South Africa. DSI plans to strategically expand its export activities into the important neighboring countries such as Botswana and Zimbabwe. Clients include BHB Billiton, Xstrata, Exxaro, De Beers, Anglo American Thermal Coal, Anglo American Platinum, Bombela Construction, Sasol, CMI Joint Venture and a large number of small and medium sized mining operations

DSI acquires a majority stake in UK specialist mining contractor Drill Tek Injection Systems Ltd. Drill Tek is a mining services contractor offering both contracting services such as roof bolt installation and resin injection as well as product supply for roof support and reinforcement in underground mines. Additionally, the UK based company provides specialist services for tunneling and civil infrastructure construction. The acquisition represents a strategic investment for the future of DSI’s business and is the first acquisition undertaken since Triton Partners acquired DSI in June 2011.
- Acquisition of 100% of JENNMAR Canada strengthens DSI’s mining capabilities in Canada
- Acquisition of 49% in J-LOK® Resins allows DSI to have own manufacturing of resin capsules in Australia
- Establishment of a bolt and resin joint venture with JENNMAR in South Africa
Acquisition of the Jennmar Mining businesses outside the US, sale of the US Mining business to Jennmar. The acquisition allows DSI’s customers to profit from the most comprehensive portfolio in ground support products.

DSI Underground and Northern Mining Products (NMP) Sweden, sign an exclusive agreement to manufacture and sell the Dynamic OMEGA-BOLT®. The innovative rock bolt is based on the well-known expandable OMEGA-BOLT® friction bolt and is equipped with an internal additional steel element having a “C” profile that can absorb a significant amount of elastic energy.
Establishment of the new company DSI Underground Mongolia LLC in Ulaanbaatar, Mongolia.
Change of name of the US American DSI Underground unit located in Louisville, KY, USA to DSI Tunneling LLC. All sales activities in Tunneling North America are concentrated at this location.
Establishment of DSI Underground Nordic AB in Skellefteå, Sweden. The new logistics center can efficiently supply some of the largest underground metal mines in Europe with high quality ground support products on short notice.

DSI Underground Australia and Fero Group Pty Ltd sign an agreement under which DSI Underground Australia acquires 100 per cent of Fero. The acquisition completes DSI Underground’s product offer in galvanizing and mesh manufacturing. The completion of the acquisition is conditional on approval from the Australian anti-trust authority, the ACCC.

DSI Underground installed two new automated weld cells and a quality control testing station to produce friction bolts at Val d’Or, Québec, Canada. This significant investment enables us to produce an additional one million friction bolts per year in Val d'Or to meet the increasing demand of our customers.
[Translate to English:]
Sandvik completes the acquisition of DSI Underground. DSI will be included in the Sandvik Mining and Rock Solutions new Ground Support Division as DSI Underground – a Sandvik Company. Customers will continue to receive the high-quality products and services they came to know from DSI, with this combination strengthening the offerings for our clients.