Evaluation of the use of sublevel open stoping in the mining of moderately dipping medium-thick orebodies
Xu S. Liang R. Suorineni F.T. Li Y.
March 2021China University of Mining and Technology
International Journal of Mining Science and Technology
2021#31Issue 2333 - 346 pp.
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.
Backpropagation neural network , Fan blastholes , Moderately dipping medium-thick orebody , Ore recovery , Sublevel open stoping
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Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang, 110819, China
School of Mining and Geosciences, Nazarbayev University, Astana, 010000, Kazakhstan
School of Natural Resources and Civil Engineering, Northeastern University, Shenyang, 110819, China
Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines
School of Mining and Geosciences
School of Natural Resources and Civil Engineering
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