A hybrid approach to predict hang-up frequency in real scale block cave mining at El Teniente mine, Chile. (December 2021)

• Record Type: Journal Article
• Authors: Hekmatnejad, Amin; Crespin, Benoit; Pan, Peng-zhi; Emery, Xavier; Mancilla, Fernando; Morales, Marco; Seyedrahimi-Niaraq, Mirmahdi; Schachter, Paulina; Gonzalez, Roberto
• Is Part Of: Tunnelling and underground space technology. Volume 118(2021)
• Publication Date: 2021-12
• Subjects: In-situ rock fragmentation -- Hang-up frequency -- Block cave mine -- Discrete fracture network -- Geostatistical simulation -- Supervised vector machine; Tunneling -- Periodicals; Underground construction -- Periodicals; Tunnels -- Periodicals; Underground areas -- Periodicals; 624.193
• DOI: 10.1016/j.tust.2021.104160
• Languages: English
• ISSNs: 0886-7798

Abstract

Highlights: Evaluation of In-situ ore fragmentation to predict hang-up occurrence probability. Uncertainty of rock block geometry and its impact on blockiness level. In-situ ore fragmentation prediction at real mine scale and real time. Hybrid Predictive modeling of hanging-up frequency in block cave mining. Large scale discrete fracture network modeling application at block cave mine. Abstract: The in-situ ore fragmentation and probability of occurrence of hang-ups at draw points are the most significant factors on the performance of block cave mining. In this study we develop a hybrid methodology to study the uncertainty in the block geometry in the context of blockiness variable and hang-up frequency at a cave mine. This hybrid approach is based on the combination of geostatistical simulation, probabilistic discrete fracture network, geometrical and topological characterization of the fracture networks and supervised Poisson regression models. Our results and hybrid predictive models provide guidance on the systematic characterization of the fractured rock mass at a cave mine for its design, evaluation of production rates, and for risk evaluation purposes. This study can serve as a reference for the rock block geometry analysis in other related fields.