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The areas of improvement in the design of the crowns of roadheaders of selective action and other mining machines. Suggested was the usage of biconical, conical disk tools and their attachment assemblies to the triangular prisms on the crowns of roadheaders and shearers-bladed screws for the destruction of structurally inhomogeneous working faces. The solution to the problem of combining the processes of rock destruction, crushing and loading by boom-type cutting bodies in driving headings by roadheaders of selective action is presented. The recommendations are given on agreed reverse modes of two radial crowns with the disc tool mounted on triangular prisms for the extension of loading area in the near-sidewalls spaces of mine workings. The process of formation of loads on the disc tool during destruction of rock was studied. The calculated dependences are presented of the transverse efforts on the cutting body with two kinematiccally connected radial reversible crowns for eight standard fixed stages of rotation of the crowns with the disc tools in the destruction.

The Power Characteristics of the Reversible Radial Crowns with Disk Tools for Roadheaders of Selective Action