Developed by Robbins for use in rock up to 200 MPa UCS, the MDM5000 excavates with a reciprocating cutterhead and swinging cutterhead motion to create a rectangular cross-section tunnel. At Mexico’s oldest silver mine, Fresnillo Plc., in Fresnillo, Mexico the Robbins Company is unveiling the latest innovation in tunnel boring machines (TBM), with its rectangular TBM, known as the MDM5000 (standing for Mine Development Machine with dimensions of 5 m by 4.5 m or 16 ft by 15 ft). The MDM5000 is making headway at the mine, according to Robbins. Fresnillo chose the MDM5000 because it is capable of excavating a flat tunnel invert for immediate use by rubber-tired vehicles. The MDM5000 is boring a mine access tunnel in andesite and shale with quartz intrusions that have defied earlier atte...
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