TY - JOUR
T1 - Development of a geomechanical model based on suitable estimations of GSI and UCS in mining production slopes at the TilTil district, central Chile
AU - Del Pozo, Félix
AU - Córdova, Eduardo
AU - Marquardt, Carlos
AU - Cabezas G, Rodolfo
AU - Benson, Philip
AU - Koor, Nick
AU - Browning, John
AU - Rudloff, Rocío
N1 - Funding Information:
Firstly, we wish to thank the Chilean National Service of Geology and Mining (Sernageomin), the Chilean National Society of Mining (Sonami), and the Union of Tiltil Miners (ASOGMIT) for their cooperation in providing historic information for the Tiltil mining district. We also wish to thank the Llay Llay laboratory for their assistance in sample preparation and laboratory analysis. We appreciate comments on an earlier version of the manuscript from Philip Benson. Finally, we offer thanks to the members of the FIC-R N o 10 project of the Region Metropolitana and financial source for support this work. JB acknowledges support from Fondecyt Iniciación award 11190143 .
Funding Information:
Firstly, we wish to thank the Chilean National Service of Geology and Mining (Sernageomin), the Chilean National Society of Mining (Sonami), and the Union of Tiltil Miners (ASOGMIT) for their cooperation in providing historic information for the Tiltil mining district. We also wish to thank the Llay Llay laboratory for their assistance in sample preparation and laboratory analysis. We appreciate comments on an earlier version of the manuscript from Philip Benson. Finally, we offer thanks to the members of the FIC-R No10 project of the Region Metropolitana and financial source for support this work. JB acknowledges support from Fondecyt Iniciación award 11190143.
Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/7/1
Y1 - 2023/7/1
N2 - The majority of applied geomechanical models are poorly suited for use in small-scale mining operations owing to the time, costs, and technical knowledge needed to usefully apply them. This means that it is often not possible to accurately obtain an adequate account of rock properties in advancing mining areas, which can lead to geomechanical related problems such as rockfalls and slope failures. Here we propose an adaptation to an existing methodology which allows the construction of a simple geomechanical model, that can be adjusted depending on mining developments, and used to develop recommendations for the design parameters of mining production slopes in small-scale open-pit operations. The adapted model, which considers the use of rock mechanics tests on rocks collected over a district level, along with UCS estimation, GSI characterization and FEM modelling, is based on an estimation of the parameters derived by1; namely material constants mi, mb, s, and a. Results show that the Uniaxial Compressive Strength (UCS), measured for rocks in the same district, serves as an adequate estimation of the specific UCS in the advancing mining area in the modified geomechanical model when both the field estimates and direct sampling are within a determined range.
AB - The majority of applied geomechanical models are poorly suited for use in small-scale mining operations owing to the time, costs, and technical knowledge needed to usefully apply them. This means that it is often not possible to accurately obtain an adequate account of rock properties in advancing mining areas, which can lead to geomechanical related problems such as rockfalls and slope failures. Here we propose an adaptation to an existing methodology which allows the construction of a simple geomechanical model, that can be adjusted depending on mining developments, and used to develop recommendations for the design parameters of mining production slopes in small-scale open-pit operations. The adapted model, which considers the use of rock mechanics tests on rocks collected over a district level, along with UCS estimation, GSI characterization and FEM modelling, is based on an estimation of the parameters derived by1; namely material constants mi, mb, s, and a. Results show that the Uniaxial Compressive Strength (UCS), measured for rocks in the same district, serves as an adequate estimation of the specific UCS in the advancing mining area in the modified geomechanical model when both the field estimates and direct sampling are within a determined range.
KW - Geomechanical estimation
KW - Geomechanical model
KW - Safety factor
KW - Slope stability
KW - Small-scale mining
UR - http://www.scopus.com/inward/record.url?scp=85153679993&partnerID=8YFLogxK
U2 - 10.1016/j.ijrmms.2023.105390
DO - 10.1016/j.ijrmms.2023.105390
M3 - Article
AN - SCOPUS:85153679993
SN - 1365-1609
VL - 167
JO - International Journal of Rock Mechanics and Mining Sciences
JF - International Journal of Rock Mechanics and Mining Sciences
M1 - 105390
ER -