Study on the Minimum Safety Thickness of Goaf Overlying Strata based on UDEC in Baorixile Surface Coal Mine

DOI

10.2991/edep-18.2018.65How to use a DOI?

Keywords

Goaf; safety thickness; UDEC; surface coal mine

Abstract

The determination of safety thickness of overlying strata is the prerequisite for the treatment of mined out areas. Taking the mudstone of the Cenozoic Pleistocene as the upper bound of the model and the 1# coal seam floor as the lower bound, the stress and strain of overlying strata under goaf span 15m~40m was simulated based on the resources hosting condition at Baorixile Surface Coal Mine. By comparing the numerical simulation result with 8 theoretical methods the safety thickness of overlying strata is approximately parabolic with the increase of goaf span. The paper found out the relationship between the goaf span and the safety thickness of overlying strata with quadratic function regression analysis based on multiple methods, thus, evaluated the stability of 20 large goaf. The productive practice of surface coal mine has proved that it is reliable to treat the goaf based on the safety thickness of overlying strata.

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  - Xing-Jun JU
AU  - Tao SHANG
AU  - Shu-Zhao CHEN
AU  - Meng YANG
AU  - Wen-Bin ZHU
PY  - 2018/10
DA  - 2018/10
TI  - Study on the Minimum Safety Thickness of Goaf Overlying Strata based on UDEC in Baorixile Surface Coal Mine
BT  - Proceedings of the 2018 International Conference on Energy Development and Environmental Protection (EDEP 2018)
PB  - Atlantis Press
SP  - 420
EP  - 426
SN  - 2352-5401
UR  - https://doi.org/10.2991/edep-18.2018.65
DO  - 10.2991/edep-18.2018.65
ID  - JU2018/10
ER  -