A control system for continuous mining machine to control the mining horizons of roof and floor horizons relative to the rock boundaries of an underground coal seam or ore vein. The chassis includes laterally opposing side flaps formed by laterally inwardly folded portions of the chassis and deployable chassis ears formed by other laterally inwardly folded portions of the chassis. The optical waveguide structure layer 10 includes an optical waveguide 4 and a clad layer. The individual recognizing area on the optical disk may be provided at an outer-circumference portion adjacent to the film forming area as the main-information area on the substrate.