A new cutting drum expands the range of applications for surface miners in hard rock and stone
1 The 280 SM(i) cuts limestone with a uniaxial compressive strength of 110 MPa at a rate of 400 t/h
© Wirtgen Group
Limestone, gypsum, anhydrite, and other hard rocks
and minerals
The new cutting drum is equipped with HT14 toolholders and features a redesigned cutting geometry. The field-proven and established central-drum concept, which ensures optimum utilization of the machine weight, and the direct belt drive that guarantees the transfer of high usable power to the cutting drum, also contribute to the ability of Surface Miners to profitably extract even very hard rocks and minerals with uniaxial compressive strengths of 100 MPa UCS and more – for instance limestone, gypsum, or anhydrite.
The Wirtgen 280 SM(i) with the new cutting
drum in action
The new cutting drum celebrated its premiere in practice on a limestone quarrying job carried out by a Surface Miner 280 SM(i) in Louisville, Nebraska. In addition to the extraction of very hard limestone at the quarry, the elimination of the need for drilling and blasting made it possible to extract previously unexploitable limestone deposits and extend the working life of the quarry and all downstream production systems by several decades. For the quarry operator, surface mining is a cost-effective extraction solution that also contributes to safeguarding jobs, increases safety in the quarry, and enables responsible management of resources.
2 Continuous direct loading of 70-ton mining dump trucks is no problem at all for the Wirtgen Surface Miner
© Wirtgen Group
Faster infrastructure projects
Wirtgen expanded its portfolio of products and applications with the Cross-Application Miner 260 SX(i) two years ago. The Cross Application Miner speeds up construction times by eliminating the need for drilling and blasting, with the construction of stable embankments, in-situ grading of railroad tracks, and the recycling of the extracted material in-place for use in further construction.
Wirtgen Group Services: Expertise and best practices
are essential
At MINExpo 2024, trade and industry visitors to the show will also be able to talk with surface mining experts from the Wirtgen Group about all other aspects of the solution – for example deployment and project assessment, recommended machines and equipment, related cost and performance estimation, and financing solutions.
