JKMRC Friday Seminar 2025: Block Caving: What should I know?

JKMRC Friday Seminar 2025: Block Caving: What should I know?

by Jo-Anne Dudley

Applied Sciences & Engineering Engineering & Technology TTOther technologies and applied sciencesTTUMining technology and engineering
🎙 Jo-Anne Dudley 👥 6K 📅 August 17, 2025 ⏱ 62 min 👁 496 📄 expert opinion 🧭 2026-08-17
Available in: English (current) Français

Keywords

block cavingunderground miningorebodydrawpointfragmentationgrade variabilitymining methodprocessingdilutioncave management

Summary

The seminar, presented by Jo-Anne Dudley, a mining engineer with extensive experience in block caving, provides an overview of this underground bulk mining method. It begins with a video of the Oyu Tolgoi mine in Mongolia, illustrating the scale and key components such as undercutting, drawbells, and LHDs. The talk then discusses the global and Australian context, highlighting major caving operations and their production rates. The reasons for choosing block caving are explained: it is the only underground method that can compete with open-pit costs, it is suitable for large, deep orebodies, and it offers environmental and safety benefits. The core of the presentation focuses on the transformation from a 3D orebody to a 2D production stream, emphasizing the challenges of predicting grade, deleterious elements, and hardness due to limited data and inherent variability. The role of geostatistics, geology, and fragmentation models is discussed. The talk also addresses the issue of material mixing during extraction and its implications for processing, highlighting both potential benefits and drawbacks. Finally, it touches on the importance of communicating variability to stakeholders and the factors that can affect production rates and ramp-up.

187 words

Critical Evaluation

Value of the Information & Strength of the Argument

The presentation offers valuable insights into block caving from an expert practitioner’s perspective. It effectively explains the technical and operational aspects, including the reasons for using this method, the challenges of orebody characterization, and the importance of understanding material flow for processing. The argumentation is solid, based on real-world examples and the speaker’s extensive experience. The talk is well-structured, progressing logically from an introduction to the method, to its global significance, to the technical details of orebody-to-production conversion, and finally to the implications for processing and variability management. The speaker’s expertise is evident, and she provides practical knowledge that would be useful for professionals in mining and mineral processing.

Scientific Rigor, Source Quality, Title Accuracy

The presentation demonstrates strong scientific rigor, with the speaker drawing on her extensive professional experience and referencing specific mines and projects. She mentions technical tools like PCBC and geostatistical methods, and discusses real-world examples such as Oyu Tolgoi, Grasberg, and Cadia. However, the talk does not provide formal citations or references to published literature, which limits its academic rigor. The title accurately reflects the content, as the talk indeed covers what one should know about block caving. The content is well-organized and the speaker’s expertise is evident, but the lack of explicit sources is a minor weakness.

221 words

Title / Content Match

The title accurately reflects the content, which provides a comprehensive overview of block caving for a general technical audience.

Quality & Reliability

8/10

Presentation by a highly experienced mining engineer with over 20 years in block caving, including work on major projects like Oyu Tolgoi. The content is technically accurate, well-structured, and grounded in practical experience. However, it is an expert opinion rather than a peer-reviewed study, and some claims lack specific citations.

Key Moments

Markers derived by PSI from the transcript: the creator did not define chapters.

Cited Sources

Concurring Sources

Contribution & Novelties

The presentation provides a comprehensive overview of block caving from an expert perspective, emphasizing the importance of understanding ore flow characteristics for processing. It highlights the challenges of predicting grade and variability due to limited data and the inherent mixing during extraction. The talk offers practical insights into the mining method, its benefits, and its implications for mineral processing.

Pour aller plus loin :

102 words

Radar Profile

The radar profile shows high scores in quantity and quality of information, and moderate to high technical level and reliability. This indicates a well-informed and technically sound presentation, with a slight emphasis on practical knowledge over formal academic rigor.

Reliability 8/10

💬 No comments were provided for analysis.