| U型通风采场的温度场相似实验模型 |
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| 引用本文： | 王树刚,迟子豪,张腾飞,梁运涛. U型通风采场的温度场相似实验模型[J]. 中国矿业大学学报, 2012, 41(1): 31-36 |
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| 作者姓名： | 王树刚 迟子豪 张腾飞 梁运涛 |
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| 作者单位： | 1. 大连理工大学建设工程学部,辽宁大连,116024
2. 煤炭科学研究总院沈阳研究院,辽宁沈阳,110016 |
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| 基金项目： | 国家高技术研究发展计划(863)项目 |
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| 摘 要： | 为了预测采动影响下采场温度分布状态,建立了U型通风采场的温度场实验台以模拟采场中的热输运现象.基于采场内流场与温度场数学模型,提出了选取α2rxr/u2r=α3rd2nr/ur=xr/pfr和xr/urTr=1/qr作为模型的相似关系式,确定了模型中独立变量的合理取值,论证了为使温度场相同而应满足的热源项的比例关系.模拟U型通风采场的氧化带局部区域自热工况的实验结果表明:采场温度场分布趋势与数值模拟及现场实测结果吻合较好,均呈现由进风口到回风口先上升再下降的分布规律,并在采空区倾向中心线偏回风口20～30m处出现温度峰值,实验台能够合理再现实际采场的热交换过程.
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| 关 键 词： | 采空区 相似比 温度场 实验台 内热源 |
A scaled test model for predicting the temperature field in a coal mine stope with a U-shaped ventilation system |
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| WANG Shu-gang,CHI Zi-hao,ZHANG Teng-fei,LIANG Yun-tao. A scaled test model for predicting the temperature field in a coal mine stope with a U-shaped ventilation system[J]. Journal of China University of Mining & Technology, 2012, 41(1): 31-36 |
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| Authors: | WANG Shu-gang CHI Zi-hao ZHANG Teng-fei LIANG Yun-tao |
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| Affiliation: | 1.Faculty of Infrastructure Engineering,Dalian University of Technology,Dalian,Liaoning 116024,China; 2.Shenyang Branch of China Coal Research Institute,Shenyang,Liaoning 110016,China) |
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| Abstract: | A scale test rig was constructed to model heat transport within a coal mine stope.The stope temperature distribution during underground mining was predicted from the model.Dimensionless relationships α2rxr/u2r=α3rd2nr/ur=xr/pfrand xr/urTr=1/qr were proposed as an accurate way to reproduce temperature gradients in the stope.These relationships are based on equations describing heat diffusion.Starting from reasonable estimates of the independent variables and scaled heat source values the temperature distribution was derived.On site measurements compared to simulation data for the temperature distribution suggest agreement between the two sets of values.It is shown that the temperature declines as rising air moves along the air inlet toward the air return of the working face.The temperature peaks from 20 to 30 meters from the goaf center line on the tail gate side.The experimental apparatus does a reasonable job of reproducing the actual heat transfer in a mine stope. |
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| Keywords: | goaf similarity ratio temperature distribution test rig internal heat source |
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