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首页> 外文会议>2007采矿科学与安全技术国际学术会议 >Study on the Optimization of the Fully Mechanized Top-Coal Caving Mining Techniques in Steep-Thick Coal-Seams
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Study on the Optimization of the Fully Mechanized Top-Coal Caving Mining Techniques in Steep-Thick Coal-Seams

机译：厚煤层综放开采技术优化研究

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摘要

PFC2D (Particle Flow Code in 2 Dimensions) models the movement and interaction of circular particles by the distinct element method(DEM). The numerical investigation using PFC2D reveals the falling and moving process of the top-coal and rocks in loose state. The dynamic characteristics of coal failure with the different caving distance under the condition of uninterrupted advancing are analyzed. The recovery rate of the top-coal and the working condition of the hydraulic supports in the top-coal caving working face with the different caving sequence are also discussed in detail. The study shows that in the mining sequence from above to below in the polyline-type mechanized working face, the recovery rate of the top-coal is high and the force applied on the supports is uniform. The research results are important for the design and optimization of the caving mining.
机译：PFC2D（二维粒子流代码）通过独特元素方法（DEM）对圆形粒子的运动和相互作用进行建模。使用PFC2D进行的数值研究揭示了松散状态下的顶煤和岩石的下落和移动过程。分析了不间断推进条件下不同放顶距离煤破坏的动力学特征。还详细讨论了不同放顶次序的顶煤放放工作面顶煤的采收率和液压支架的工作状态。研究表明，在多线型机械化工作面上从上到下的开采顺序，顶煤的采收率很高，作用在支架上的力是均匀的。研究结果对放顶开采的设计和优化具有重要意义。

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