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AssigneeBochumer Eisenhutte Heintzmann GmbH & Co. HG
InventorsGunter Blumenthal, Gustav Neu, Karl-Heinz Berger, Siegmar Block
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A method in underground coal mining for separating the upper coal of the seam from the roof during the advancement of the upper sliding cap of a support frame, wherein the front edge of the cap is forced in a plane of the cap between the upper coal to be separated and the rock from which the coal is to be separated. During the advancement of the sliding cap, the sliding cap is alternatingly moved backwardly and forwardly, so that the from edge of the sliding cap separates the upper coal during its forward movement. Alternatively or additionally, when the front edge of the sliding cap contacts the upper coal, alternatingly higher and lower pressure can be admitted to the sliding cap in order to obtain a shaking effect. In this combined method, the sliding cap is advanced, the shaking procedure is carried out as the front edge contacts the upper coal, and the sliding cap is subsequently moved backwardly. The cycle is then repeated several times.
A method for separating the upper coal of a seam from the roof during the advancement of an upper sliding cap of a shield-type support frame, wherein a front edge of the cap is forced in a plane of the cap between the upper coal to be separated and the rock from which the coal is to be separated, and wherein the shield-type support frame is connected to a support conveyor through walking legs comprising moving the sliding cap backwardly and forwardly for several times during the advancement of the sliding cap, so that the cap is thrust between the upper coal and the rock during several successive advance movements of the cap and the steps of:
Dependencies are inferred from the claim text.