Numerical Study on the Mechanism of Water Inrush by Floor Damage and Fault Activation during Longwall Mining

DOI

10.2991/coal-18.2018.17How to use a DOI?

Keywords

hydro-mechanical coupling, floor damage, fault activation, mechanism of water inrush

Abstract

This study evaluated the damage and fracture patterns in mine floors and the fault activation caused by longwall mining, as well as the associated effects on mine water inrush. Numerical simulations were used for this evaluation. The results indicated that higher water pressures in confined aquifers and the existence of faults can increase the probability of water inrush in deep coal seams. A wider coal pillar at the fault can help prevent water inrush events. Numerical simulations were used to demonstrate the complete process of fracture development in the floor, fault activation, and formation of water inrush channels during longwall mining. This study improved the understanding of the mechanisms of water inrush through the fault zone. The results of this study are important to the design of water-resistant coal pillars in active coal seams above confined aquifers with faults

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  - Peisen Zhang
AU  - Wei Yan
AU  - Wenquan Zhang
AU  - Hao Wang
PY  - 2018/10
DA  - 2018/10
TI  - Numerical Study on the Mechanism of Water Inrush by Floor Damage and Fault Activation during Longwall Mining
BT  - Proceedings of the 9th China-Russia Symposium "Coal in the 21st Century: Mining, Intelligent Equipment and Environment Protection" (COAL 2018)
PB  - Atlantis Press
SP  - 96
EP  - 104
SN  - 2352-5401
UR  - https://doi.org/10.2991/coal-18.2018.17
DO  - 10.2991/coal-18.2018.17
ID  - Zhang2018/10
ER  -