TY - GEN
T1 - 3-D discontinuum numerical modeling of ore extraction, backfilling and subsidence in an underground iron mine in China
AU - Kulatilake, P. H.S.W.
AU - Shreedharan, S.
AU - Huang, G.
AU - Cai, S.
AU - Song, H.
N1 - Publisher Copyright:
Copyright 2016 ARMA, American Rock Mechanics Association.
PY - 2016
Y1 - 2016
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 to scale 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 at the surface. Backfilling was found to eliminate subsequent deformation and subsidence from occurring. The extraction of the upper orebody was found to influence deformations 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 to scale 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 at the surface. Backfilling was found to eliminate subsequent deformation and subsidence from occurring. The extraction of the upper orebody was found to influence deformations 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.
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M3 - Conference contribution
AN - SCOPUS:85010303971
T3 - 50th US Rock Mechanics / Geomechanics Symposium 2016
SP - 3144
EP - 3151
BT - 50th US Rock Mechanics / Geomechanics Symposium 2016
PB - American Rock Mechanics Association (ARMA)
T2 - 50th US Rock Mechanics / Geomechanics Symposium 2016
Y2 - 26 June 2016 through 29 June 2016
ER -