特厚煤层顶煤放出规律及工艺优化

Release law and process optimization of top coal in extra-thick coal seams

  • 摘要:
    目的 针对我国综采放顶煤开采过程中存在的顶煤采出率偏低这一关键技术难题,通过研究不同开采参数对顶煤回收效果的影响,探索工艺优化方案。
    方法 采用离散元数值模拟软件构建计算模型,重点分析了在不同放煤步距与不同放煤方式组合工况下顶煤的运移与放出规律。
    结果 结果表明,在不同的放煤步距对比下,两刀一放和三刀一放明显优于一刀一放,结合矿山实际生产,采用两刀一放效果最好;在不同的放煤方式对比下,双轮间隔放煤在顶煤采出率方面优于其余三种方式。
    结论 放煤步距与放煤方式的协同优化是提高综放工作面顶煤采出率的有效途径。对于具体矿井条件,推荐采用“两刀一放”的放煤步距配合“双轮间隔”的放煤工艺。该组合方案能够显著提升顶煤回收率,对指导现场生产具有重要实践价值。

     

    Abstract: To address the key technical challenge of low top coal recovery rate in China's fully mechanized top coal caving mining process, we investigate the impact of various mining parameters on top coal recovery efficiency and explores process optimization strategies. Using discrete element numerical simulation software, a computational model was developed to analyze the movement and extraction patterns of top coal under different drawing intervals and release methods.The findings indicate that, compared with a one-cut-one-release method, the two-cuts-one-release and three-cuts-one-release methods significantly improve top coal recovery. Based on actual mining conditions, the two-cuts-one-release method yields the best results. Additionally, the double-wheel staggered release method outperforms the other three methods in terms of top coal recovery rate. Coordinated optimization of drawing intervals and methods is an effective approach to enhance top coal recovery rates in fully mechanized top coal caving faces. For the specific mine conditions discussed in this study, the recommended combination is the "two-cuts-one-release" interval paired with the "double-wheel staggered" release method. This combined approach can significantly boost top coal recovery rates.

     

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