TY - JOUR
T1 - 3-D discontinuum numerical modeling of subsidence incorporating ore extraction and backfilling operations in an underground iron mine in China
AU - Huang, Gang
AU - Kulatilake, Pinnaduwa H.S.W.
AU - Shreedharan, Srisharan
AU - Cai, Sijing
AU - Song, Hongqing
N1 - Funding Information:
The authors acknowledge the support from the National Natural Science Foundation of China (No. 51404024). The research was also partially funded by the NIOSH of the Centers for Disease Control and Prevention, USA through Contract No. 200-2011-39886 given to the second author. The first author of the paper is grateful to the Chinese Scholarship Council (CSC) for providing a scholarship to conduct the research described in this paper as a Visiting Research Student at the University of Arizona, USA. The authors would like to acknowledge Luohe iron mine for providing laboratory and field geological and geotechnical data used in the research.
Publisher Copyright:
© 2017
PY - 2017/3/1
Y1 - 2017/3/1
N2 - An underground iron mine in China has been used as a case-study to research the subsidence due to ore extraction and backfilling during open stoping operations. A 3-D discontinuum numerical model was built incorporating geologic complexities including faults and interfaces between different lithologies, and the stoping and backfilling sequence adopted from the mine plans. The stoping was carried out in two vertically stacked horizontal layers, with a total of 16 stopes. Large displacements of up to 50 cm were observed along the roof of the stopes, and a maximum surface subsidence of 22.5 cm was observed. Backfilling was found to eliminate subsequent displacements and subsidence. The extraction of the upper orebody was found to influence displacements in the lower orebody. Finally, a subsidence profile was constructed to show the subsidence at all locations along the length of the surface and region of influence on the surface.
AB - An underground iron mine in China has been used as a case-study to research the subsidence due to ore extraction and backfilling during open stoping operations. A 3-D discontinuum numerical model was built incorporating geologic complexities including faults and interfaces between different lithologies, and the stoping and backfilling sequence adopted from the mine plans. The stoping was carried out in two vertically stacked horizontal layers, with a total of 16 stopes. Large displacements of up to 50 cm were observed along the roof of the stopes, and a maximum surface subsidence of 22.5 cm was observed. Backfilling was found to eliminate subsequent displacements and subsidence. The extraction of the upper orebody was found to influence displacements in the lower orebody. Finally, a subsidence profile was constructed to show the subsidence at all locations along the length of the surface and region of influence on the surface.
KW - Backfill
KW - Discontinuum numerical modeling
KW - Open stoping
KW - Subsidence
KW - Underground iron mine
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U2 - 10.1016/j.ijmst.2017.01.015
DO - 10.1016/j.ijmst.2017.01.015
M3 - Article
AN - SCOPUS:85010223681
SN - 2095-2686
VL - 27
SP - 191
EP - 201
JO - International Journal of Mining Science and Technology
JF - International Journal of Mining Science and Technology
IS - 2
ER -