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Piotr KALISZ

Mining impact on above-ground heating pipelines

The issue of the impact of subsoil deformations on above-ground heating pipelines, located within mining areas, was discussed. The heating pipelines are lied on supports and are constructed from steel pipes with thermal insulation. The expansion joints are mounted on these pipelines due to significant changes in temperature related to the transmission of heat energy and the resulting changes of their length. Subsoil deformations within mining areas cause the displacements of supports and thus pipelines are subjected to additional displacements, forces and bending moments. The heating pipelines are protected against the impact by the use of expansion joints with an increased operating range. In the article the way of evaluating the possibility of transferring mining deformations of the subsoil by above-ground heating pipelines was presented. Evaluation of the possibility should consider:
− assessment of the technical condition of heating pipeline construction and supports based on the field inventory data,
− assessment of the current ability to transfer subsoil deformation by pipeline compensators,
− kinematic analysis of extreme displacement values of supports resulting from the predicted values of subsoil deformation indicators,
− static strength analysis for the selected characteristic sections of the heating pipeline.