A mining machine comprising: a frame; a first boom supported for pivoting movement relative to the frame; a second boom supported for pivoting movement relative to the frame, the second boom being movable independent of the first boom; a first cutter head pivotably coupled to the first boom, the first cutter head movable through a first range of movement, the first cutter head including a first cutter shaft , a first cutting disc , and a first excitation mechanism, the first cutting disc supported for free rotation relative to the first cutter shaft about a first cutter axis , the first cutting disc including a plurality of first cutting bits defining a first cutting edge , the first excitation mechanism including a first exciter shaft and a first mass eccentrically coupled to the first cutter shaft , rotation of the first exciter shaft inducing oscillating movement of the first cutter shaft and the first cutting disc; and a second cutter head pivotably coupled to the second boom , the second cutter head laterally offset from the first cutter head in a direction transverse to a longitudinal axis of the frame, the second cutter head movable through a second range of movement intersecting the first range of movement at an overlap region, the second cutter head being laterally movable into a position that overlaps a position of the first cutter head in a height direction of the frame, the second cutter head including a second cutter shaft , a second cutting disc , and a second excitation mechanism, the second cutting disc supported for free rotation relative to the second cutter shaft about a second cutter axis , the second cutting disc including a plurality of second cutting bits defining a second cutting edge , the second excitation mechanism including a second exciter shaft and a second mass eccentrically coupled to the second cutter shaft , rotation of the second exciter shaft inducing oscillating movement of the second cutter shaft and the second cutting disc. a frame; a first boom supported for pivoting movement relative to the frame; a second boom supported for pivoting movement relative to the frame, the second boom being movable independent of the first boom; a first cutter head pivotably coupled to the first boom, the first cutter head movable through a first range of movement, the first cutter head including a first cutter shaft , a first cutting disc , and a first excitation mechanism, the first cutting disc supported for free rotation relative to the first cutter shaft about a first cutter axis , the first cutting disc including a plurality of first cutting bits defining a first cutting edge , the first excitation mechanism including a first exciter shaft and a first mass eccentrically coupled to the first cutter shaft , rotation of the first exciter shaft inducing oscillating movement of the first cutter shaft and the first cutting disc; and a second cutter head pivotably coupled to the second boom , the second cutter head laterally offset from the first cutter head in a direction transverse to a longitudinal axis of the frame, the second cutter head movable through a second range of movement intersecting the first range of movement at an overlap region, the second cutter head being laterally movable into a position that overlaps a position of the first cutter head in a height direction of the frame, the second cutter head including a second cutter shaft , a second cutting disc , and a second excitation mechanism, the second cutting disc supported for free rotation relative to the second cutter shaft about a second cutter axis , the second cutting disc including a plurality of second cutting bits defining a second cutting edge , the second excitation mechanism including a second exciter shaft and a second mass eccentrically coupled to the second cutter shaft , rotation of the second exciter shaft inducing oscillating movement of the second cutter shaft and the second cutting disc. <EOS>