Abstract
A number of coal and oil shale deposits are characterized by a complex structure, when layers of minerals are interspersed with empty rocks. The miner's working body design with automatically variable arrangement and length of incisors is proposed. It allows efficient development of complexstructured coal deposits and combustible shales, composed of rocks that differ significantly in their physico-mechanical characteristics, in particular in the strength of uniaxial compression. The use of surface miners allows to abandon drilling and blasting operations, which contributes to improving the quality of minerals extracted, reducing losses during their production, minimizing the recyclable waste and reducing the impact of adverse factors on the environment. Modernized working equipment will also allow to reduce the yield of fine fractions of coal and combustible shale.
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