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首页> 外文期刊>矿业科学技术学报：英文版 >Evaluating performance of lignite pillars with 2D approximation techniques and 3D numerical analyses
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Evaluating performance of lignite pillars with 2D approximation techniques and 3D numerical analyses

机译：利用2D逼近技术和3D数值分析评估褐煤柱的性能

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摘要

This paper attempts to investigate the use of approximate 2D numerical simulation techniques for the evaluation of lignite pillar geomechanical response, formed via the room and pillar mining method. Performance and applicability of the developing methodology are assessed through benchmarking with a more direct and accurate 3D numerical model. This analysis utilizes an underground lignite mine which is being developed in soft rock environment. Through the decisions made for the optimum room and pillar layout, the design process highlights the strong points and the weaknesses of 2D finite element analysis, and provides useful recommendations for future reference. The interpretations of results demonstrate that 2D approximation techniques come near quite well to the actual 3D problem. However, external load approximation technique seems to fit even better with the respective outcomes from the 3D analyses.
机译：本文尝试研究使用近似二维数值模拟技术评估通过室和柱开采方法形成的褐煤柱岩土力学响应。通过使用更直接和准确的3D数值模型进行基准测试，可以评估开发方法的性能和适用性。该分析利用了在软岩环境中开发的地下褐煤矿。通过针对最佳房间和支柱布局做出的决策，设计过程突出了2D有限元分析的优点和缺点，并提供了有用的建议以供将来参考。结果的解释表明2D逼近技术非常接近实际3D问题。但是，外部负载近似技术似乎更适合3D分析的各个结果。

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