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地下礦山生產接續與設備調度集成優化模型

Integrated optimization model for production and equipment dispatching in underground mines

  • 摘要: 為了實現地下金屬礦山生產接續的緊湊性、科學高效地調度生產設備,針對礦山開采工序復雜、設備資源有限、生產任務量大等特點,以最短工序時間間隔和最短總完成時間為共同優化目標構建了地下礦山生產接續與設備調度集成優化模型.通過分析地下礦山生產循環順序、作業設備類型和生產能力等生產要素,考慮工序閑置期間采場的安全隱患問題,運用改進遺傳算法對最優解進行主-從兩步驟搜索,得到地下礦山生產接續和設備調度最佳方案.以國內某大型金礦為案例進行了模型的有效性驗證,解算出礦山最優的設備調度計劃.驗證結果表明,與傳統的單一目標優化相比,模型在保證完成指定任務的同時,有效縮短工序時間間隔,并且保證了作業的安全要求.

     

    Abstract: Integrated optimization of production plays a key role in realizing short completion times of underground mine processes. To achieve the best production operation, a production plan should consider factors such as the working time and equipment capacity to arrange stope mining operations, equipment, and materials supply. Underground mining operation is a process with multiple working sites and multiple cycle operations, which include rock drilling, blasting, ventilation, supporting, ore-transportation, and backfilling. Once the stope mining begins, the above six steps must be intensively integrated to minimize the exposure time. Each step of stope mining has a significant effect on the whole mining plan; therefore, it is very important to form a reasonable configuration to achieve the mining plan target. The most difficult part of underground mining operation is how to organize the production process with limited resources (i. e., equipment and materials) to accomplish a large production task. In this paper, an integrated optimization model was described for compacting the integrated production process and efficiently dispatching production equipment. Two optimal objectives were combined to shorten the interval between production processes and overall working time. Production factors such as production cycle, type of operation equipment, and production capacity are analyzed in a mathematical model. In addition, the production safety was also considered and the time intervals between different working processes were considered to shorten the stope uncontrolled time to keep the production safety in the mathematical model. The best result of mining sequence and equipment dispatching was obtained by an improved genetic algorithm which searches the feasible solutions through primary-secondary two-step searching method. The model was validated in a large gold mine in China to work out the optimal equipment scheduling plan. The results show that compared with the traditional single-target optimization, the mining task can be accomplished effectively and the intervals between processes are minimized to improve safety in the mining operation.

     

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