High-load underground dam
AssigneesDeilmann-Haniel GmbH, Bergakademie Freiberg
InventorsPeter Sitz, Thomas Oellers, Volker Kockritz, Frieder Hafner
Life of this patent
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Abstract
A dam for sealing an underground passage extending along an axis is formed with a pair of end ridges themselves formed by--oppositely inclined inner and outer surfaces and at least one middle ridge also formed by a pair of oppositely inclined surfaces. The surface projected parallel to the axis of the outer end-ridge surfaces is larger than the surface projected parallel to the axis of the dam of the inner end-ridge surfaces and the middle ridge is offset outward, that is into the earth bounding the space, of the end ridges by a distance equal to at least the difference between the sizes of the projections.
Claims4
A dam for sealing an underground passage extending along an axis, the dam being formed with a pair of end ridges formed by oppositely inclined inner and outer surfaces and at least one middle ridge also formed by a pair of oppositely inclined surfaces, the surface projected parallel to the axis of each of the outer end-ridge surfaces being greater than the surface projected parallel to the axis of the dam of the respective inner end-ridge surfaces and the middle ridge being offset from the axis outward of the end ridges by a distance equal to at least the difference between the sizes of the projections.
Dependencies are inferred from the claim text.