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A multi-step approach for block-cave production scheduling optimization

International Journal of Mining Science and Technology 2013年第5期23卷 739-750页

作者： Yashar Pourrahimian Hooman Askari-Nasab Dwayne D.Tannant Department of Civil and Environmental Engineering School of Mining and Petroleum EngineeringUniversity of Alberta School of Engineering University of British Columbia

Production schedules that provide optimal operating strategies while meeting practical,technical,and environmental constraints are an inseparable part of mining *** only on manual planning methods or computer software based on heuristic algorithms will lead to mine schedules that are not the optimal global *** mine planning models have been proved to be very effective in supporting decisions on sequencing the extraction of material in *** objective of this paper is to develop a practical optimization framework for caving operations’production *** overcome the size problem of mathematical programming models and to generate a robust practical near-optimal schedule,a multi-step method for long-term production scheduling of block caving is presented.A mixed-integer linear programming(MILP)formulation is used for each *** formulations are developed,implemented,and verifed in the TOMLAB/CPLEX *** production scheduler aims to maximize the net present value of the mining operation while the mine planner has control over defned *** and comparison of the models for production scheduling using 298 drawpoints over 15 periods are presented.

关键词： block caving Aggregation Production scheduling MILP CPLEX

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caving performance through the integration of microseismic activity and numerical modeling at DOZ-PT Freeport,Indonesia

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International Journal of Minerals,Metallurgy and Materials 2009年第1期16卷 1-6页

作者： Rubio Enrique Napitupulu Daulat Mining Engineering Department Universidad de Chile Geotechnical Engineering Department PT Freeport IndonesiaTembagapuraIndonesia

This article describes an undergoing research at PT Freeport, Indonesia, in which the main goal is to use the microseismic information recorded as a result of mining to analyze cave propagation and stress performance on the actual production and fixed infrastructure. At the moment, several numerical experiments have been conducted to correlate the mining activity with the microseismic events using the data collected during year 2005 and 2006. As a result of the preliminary analysis a micro- and a macrocracking envelop were proposed on the basis of computation of stress behavior at the location of the events. Stresses have been computed using standard elastic continuous boundary element models. The correlation between the average source radius and the stress performance has provided a method to propose a macrocracking criterion. Several techniques have been tested to nucleate the microseismic activity around different geological features. This last attempt was aimed to look at potential overstresses induced over the undercut and extraction level drifts. A method was devised to integrate the microseismicity into a 3-dimensional ride distribution model. This model has shown to be very effective to quantify the overstress induced as a result of computing volumetric microseismicity density. The volumetric microseismic model showed to induce overstress up to 10 MPa over a period of two months. The future work will concentrate on the calibration of the integrated model with actual damage observations made at the current mining infrastructure.

关键词： microseism underground mining block caving stress distribution microcrack criterion

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Recent Technological Innovation for the New Generation of CRIST Sensors—A Practical Approach in China’s Largest Underground Nonferrous Mine

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Open Journal of Applied Sciences 2023年第8期13卷 1348-1362页

作者： Xiaoqiang Guan Haibin Li Zhiyong Tan Xubin Wu Wei Zhang Chinalco Research Institute of Science and Technology Co. Ltd. Beijing China Chinalco Intelligent Tongchuang Technology (Yunnan) Co. Ltd. Kunming China

Located in Shangri-La county, Yunnan Province, China’s biggest underground nonferrous mine Pulang Copper Mine is under construction. To date, the defined copper reserves at the Pulang Copper Mine are 4.8 million tonnes of copper and an average grade of 0.34%. The mineralized zone is 2300 m long, 600 - 800 m wide, and 1000 m high in a dome shape. The first-stage mining and processing capacity is 12.5 million tonnes of ore per year. By geotechnical investigation, ore haulage is adopted via a drift and ore pass development system. From mineralogical analysis, a majority of the Pulang copper ore body is classified as a type III rock, which is generally considered to be suitable for block-caving methods. As an update to the traditional mine-to-mill approach, a cave-to-mill integrated production concept is then introduced. This is essentially the integration of underground mine production scheduling and monitoring with surface mineral processing management based on fragment size and geometallurgical ore characteristics. Several unique challenges experienced during the project design and construction, as well as a number of features aimed at mitigating these problems, are also discussed in this paper.

关键词： block caving Cave to Mill Geometallurgy Lithology Sensors

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