Patent ID: 7438365

Claim:
Mining device comprising bracing means for reversibly bracing the mining device in a hollow space, a frame and tunneling means stationarily connected with the bracing means, whereby the frame is movable into a predefined direction by the tunneling means, wherein a rotatable roller is arranged on the frame, at the circumference of which cutting tools and clearing devices are arranged such that a rectangular mining cross-section can be created and such that the mining device and also particularly the frame of the mining device is movable into a mining tunnel created by these cutting tools and wherein at least one edge cutting tool is arranged on the circumference of the roller such that it projects above the roller in axial direction at least when the roller is in a rotational position in which the edge cutting tool is located on a side of the roller facing away from the bracing means and, wherein the at least one edge cutting is arranged such that it is unfolded in an axial direction of the roller when the roller is in a rotational position in which the edge cutting tool is located on a side of the roller facing away from the bracing means and that it is folded when the roller is in a rotational position in which the edge cutting tool is located on a side of the roller facing towards the bracing means; the mining device having two rollers being arranged in parallel, whereby the axis of rotation of the one roller is located in a line with the axis of rotation of the other roller.