TY - JOUR
T1 - Evaluation of the use of sublevel open stoping in the mining of moderately dipping medium-thick orebodies
AU - Xu, Shuai
AU - Liang, Ruiyu
AU - Suorineni, Fidelis T.
AU - Li, Yuanhui
N1 - Funding Information:
The authors wish to thank the staff of Shandong Gold Group Co. Ltd Jiaojia Gold mine for providing access to their mine for this research. The authors also acknowledge the Project Manager, Zhang Zhonghui, for his contributions. This study was funded by the State Key Research Development Program of China (2018YFC0604400), the National Science Foundation of China (No. 51874068), the Fundamental Research Funds for the Central Universities (N160107001, N180701016), and the 111 Project (B17009). The authors also acknowledge Nazarbayev University for the Faculty Development Competitive Research Grant (240919FD3920).
Publisher Copyright:
© 2021
PY - 2021/3
Y1 - 2021/3
N2 - The flow of blasted ore during mining of moderately dipping medium-thick orebodies is a challenge. Selecting a suitable mining system for such ore bodies is difficult. This paper proposes a diamond layout sublevel open stoping system using fan blastholes with backfilling to mine such orebodies. To evaluate the performance of system the relationships between ore recovery and stope footwall dip angle, footwall surface roughness, drawpoint spacing and production blast ring burden were investigated. An ore recovery data set from 81 laboratory physical model experiments was established from combinations of the listed factors. Various modules in a back propagation neural network structure were compared, and an optimal network structure identified. An ore recovery backpropagation neural network (BPNN) forecast model was developed. Using the model and sensitivity analysis of the factors affecting the proposed open stope mining system, the significance of each factor on ore recovery was studied. The study results were applied to a case study at the Shandong Gold Group Jiaojia Gold Mine. The results showed that the application of a BPNN and sensitivity analysis models for ore recovery prediction in the proposed mining system and field experimental results confirm that the suggested mining method is feasible.
AB - The flow of blasted ore during mining of moderately dipping medium-thick orebodies is a challenge. Selecting a suitable mining system for such ore bodies is difficult. This paper proposes a diamond layout sublevel open stoping system using fan blastholes with backfilling to mine such orebodies. To evaluate the performance of system the relationships between ore recovery and stope footwall dip angle, footwall surface roughness, drawpoint spacing and production blast ring burden were investigated. An ore recovery data set from 81 laboratory physical model experiments was established from combinations of the listed factors. Various modules in a back propagation neural network structure were compared, and an optimal network structure identified. An ore recovery backpropagation neural network (BPNN) forecast model was developed. Using the model and sensitivity analysis of the factors affecting the proposed open stope mining system, the significance of each factor on ore recovery was studied. The study results were applied to a case study at the Shandong Gold Group Jiaojia Gold Mine. The results showed that the application of a BPNN and sensitivity analysis models for ore recovery prediction in the proposed mining system and field experimental results confirm that the suggested mining method is feasible.
KW - Backpropagation neural network
KW - Fan blastholes
KW - Moderately dipping medium-thick orebody
KW - Ore recovery
KW - Sublevel open stoping
UR - https://www.scopus.com/pages/publications/85098955179
UR - https://www.scopus.com/pages/publications/85098955179#tab=citedBy
U2 - 10.1016/j.ijmst.2020.12.002
DO - 10.1016/j.ijmst.2020.12.002
M3 - Article
AN - SCOPUS:85098955179
SN - 2095-2686
VL - 31
SP - 333
EP - 346
JO - International Journal of Mining Science and Technology
JF - International Journal of Mining Science and Technology
IS - 2
ER -