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冰川冻土  2013 

矿井通风对多年冻土井筒围岩热影响的数值分析(Ⅱ):多年冻土井筒围岩温度的变化规律

DOI: 10.7522/j.issn.1000-0240.2013.0022, PP. 186-192

Keywords: 矿井通风,数值模拟,井筒围岩,热影响

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Abstract:

在多年冻土区进行煤矿地下开采,通风作用改变了井筒围岩的热平衡条件,从而引起了多年冻土上限及其井筒周围冻土季节融化层的变化,有可能影响到井筒支护结构的稳定性.因此,研究在矿井通风作用下,多年冻土温度场分布及随季节的变化趋势是有意义的.基于ANSYS有限元分析软件,针对多年冻土区某煤矿的赋存条件、试验采场位置以及通风作用对冻土的影响范围,建立了二维数值计算模型,利用焓式有限元方法对多年冻土井筒围岩的温度特性进行了数值模拟,分析了矿井通风对多年冻土井筒围岩的热影响程度,其计算方法和结果为下一步多年冻土煤矿地下开采井筒支护设计提供参考依据.

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