Study of axial stress distribution on the buried-pipeline in longwall coal mining

DOI

10.2991/ifeesm-17.2018.74How to use a DOI?

Keywords

surface subsidence; buried pipeline; longwall mining; stress distribution

Abstract

Taking one coal mine in Shanxi section of the west-east gas pipeline as case study, numerical modeling was adopted to study the axial stress distribution on the buried-pipeline in longwall mining. The stress distribution of the simulated pipeline coincides with the monitoring results. The results revealed that(1)the axial stress distribution on the pipeline is closely related to the distance of face advancing, it undergoes three stage evolution processes, including stress gradually increasing stage, stress concentration stage and local stress exceeding limitation stage. The stress distribution on the pipeline at the three stages are described. (2)The possible damage to the pipeline occurs at the two peak tensile stresses, which are at the outer edge of gob, then at the two peak compressive stresses, which are at the inner edge of gob. (3)The possible damage to the pipe section due to peak tensile stresses is at the top, the middle and the bottom in turn, and the possible damage to the pipe section due to peak compressive stresses is at the bottom, the top and the middle in turn. The results provided theoretical basis for the layout of the pipeline monitoring network across subsidence areas.

Copyright

© 2018, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Guoming Cheng
AU  - Kunyuan Wang
AU  - Peiyong He
AU  - Li Cui
PY  - 2018/02
DA  - 2018/02
TI  - Study of axial stress distribution on the buried-pipeline in longwall coal mining
BT  - Proceedings of the 2017 3rd International Forum on Energy, Environment Science and Materials (IFEESM 2017)
PB  - Atlantis Press
SP  - 396
EP  - 400
SN  - 2352-5401
UR  - https://doi.org/10.2991/ifeesm-17.2018.74
DO  - 10.2991/ifeesm-17.2018.74
ID  - Cheng2018/02
ER  -