A cutting assembly for a rock excavation machine having a frame includes a boom and a cutting device supported on the boom. The boom includes a first portion and a second portion, the first portion supported for pivotable movement relative to the frame. In some embodiments, the first portion includes a first structure extending along a longitudinal base axis and a second structure moveable relative to the first portion in a direction parallel to the longitudinal base axis, and at least one bearing supports the second portion for movement relative to the first portion. In some embodiments, the second portion is pivotably coupled to the first portion by a universal joint, and a suspension system including a plurality of biasing members may be coupled between the first portion and the second portion.

A cutting assembly for a rock excavation machine including a frame. The cutting assembly includes a boom supported on the frame and a cutting device. In some aspects, the boom includes a first portion and a second portion, and the first portion includes a first structure and a second structure slidable relative to the first structure. The second portion includes a first member pivotably coupled to the second structure, and a second member pivotably coupled to the first member. The cutting device is supported on the second member. In some aspects, a material handling device is supported independently of the boom and movable between a retracted position and an extended position independent of the boom.

A high-frequency vibrating transverse drum cutter head, and a drum cutter machine and a tunnel boring machine with such drum cutter head are disclosed. The transverse drum cutter wheel of the high-frequency vibrating transverse drum cutter head is driven by the cutting motor to rotate, the transverse drum cutter wheel is provided with cutting teeth, the transverse drum cutter wheel is mounted on one end of the drum cutter head base, the other end of the drum cutter head base is connected to a U-shaped drum cutter mechanism body, a connecting base is mounted on the U-shaped drum cutter mechanism body and used for mounting the high-frequency vibrating transverse drum cutter head on a drum cutter machine or a tunnel boring machine, a vibration box is mounted on the drum cutter head base, and the vibration box is adapted to output high-frequency vibration force to the transverse drum cutter wheel through the drum cutter head base, so that the transverse drum cutter wheel 16 is able to perform high-speed repetitive vibrating movement while achieving its own rotation. Both rotation motion and high frequency repetitive vibration can be implemented at the same time by the present invention, trough the combination of the transverse drum cutter wheel and the vibration box, making the cutting teeth on the drum cutter wheel apply combined action of impacting and cutting on the contacted materials, so as to break hard rock easily.