ReBop

ReBop

Itasca utilizes REBOP (Rapid Emulator Based On PFC) to simulate material drawdown within a block, panel, or sublevel cave mine by tracking the growth of draw zones (also called Isolated Movement Zones, IMZs) and corresponding fragmented rock flow associated with each drawpoint. The incremental laws governing IMZ growth and material movement in REBOP were derived on the basis of flow patterns observed in PFC3D and FLAC simulations of draw conducted by Lorig and Cundall (2000) and Pierce (2010) and in physical models conducted by a number of different researchers.

The key inputs to REBOP include fragment size distribution, initial and bulked porosity, friction angle and intact strength. The primary output from a draw analysis includes time- or tonnage-based histories of extracted ore grades and other rock properties, plots of material distribution above the drawpoints, and three-dimensional visualization of the movement and extraction zones associated with each drawpoint.

Secondary fragmentation, rilling, fines migration, and drawpoint hangups can be accounted for within REBOP simulations. The rilling logic and the ability to represent complex surface topography allow simulation of the impacts of local or large-scale failures in overlying open pit slopes or weak overburden. In addition to estimating recovery and dilution, the fragmentation exiting drawpoints can be tracked to predict hangup potential and associated drawpoint availability. In sublevel caves, the percentage of ring ore reporting to different sublevels can be tracked (i.e., primary, secondary, tertiary recovery) and tracer markers can be used to test the code against the results of in-situ marker trials.

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ReBop Updates

Latest News
  • ARMA 2022 Student Design Competition Congratulations to the winners of the American Rock Mechanics Association's (ARMA) 2022 Student Design Competition....
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  • International Slope Stability 2022 Itasca is proud to be a Diamond sponsor of Slope Stability 2022 (October 17-21 |...
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  • Charles Fairhurst Rotunda Dedication On August 26, family, friends, University of Minnesota staff and students, and Itascans gathered to...
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Upcoming Events
13 Mar
3DEC In-Person Introductory course
Live in-person introductory training course in Minneapolis, Minnesota. This course provides an overview of the capabilities and feature... Read More
16 Mar
Online Live Training : Python in Itasca Software
This course provides an overview of the Python programming language in Itasca software. The course covers major applications of Python ... Read More
27 Mar
FLAC3D In-Person Introductory Course
Live in-person introductory training course. This 3-day course provides general feature training addressing basic concepts and recommen... Read More