Sandvik MH-series hard-rock miners are advanced, electrically powered, crawler-mounted, heavyweight roadheaders designed to excavate roadways and galleries through rock with compressive strengths beyond 120 MPa. With a powerful transverse cutter-head mounted on an extremely robust telescopic boom and a face-coverage of up to 47 m2, they give very high rates of advance and are able to sump into the face without moving the tracks, keeping the floor in good condition. |  |