地下煤火热交换系统相似准则研究

发布时间：2019-06-09 23:54

【摘要】：为了开展煤田火区多场耦合条件下的温度场相似试验,采用量纲分析法对构建的地下煤火热交换系统数学模型进行了相似转换,基于提出的测试火区多个热平衡态温度场来认识火区温度变化规律的研究方法,分析了地下煤火热交换系统的相似准则.结果表明:当地下煤火模型试验系统满足应力相似、材料储热相似和火源强度相似在内的10个准则数时,可实现热平衡条件下模型和原型的含内热源热-流-固多场耦合相似,并据此确定了模型与原型参数的相似关系,形成了地下煤火相似试验方案,为分析火区覆岩裂隙发育条件下地下高温区与地表热异常区的映射关系提供了实验手段.
[Abstract]:In order to carry out the temperature field similarity test under the condition of multi-field coupling in coalfield fire area, the mathematical model of underground coal fire heat exchange system is transformed by dimensional analysis method. Based on the proposed research method of measuring multiple thermal equilibrium temperature fields in fire area to understand the law of temperature change in fire area, the similarity criterion of underground coal fire heat exchange system is analyzed. The results show that when the local coal fire model test system satisfies 10 criteria, such as similar stress, similar material heat storage and similar fire source strength, the coupling of heat, fluid and solid fields between the model and the prototype can be similar under the condition of heat balance. Based on this, the similarity relationship between the model and the prototype parameters is determined, and the similarity test scheme of underground coal fire is formed, which provides an experimental means for analyzing the mapping relationship between underground high temperature area and surface thermal anomaly area under the condition of overlying rock fracture development in fire area.
【作者单位】：中国矿业大学安全工程学院;
【基金】：教育部新世纪优秀人才支持计划项目(NCET-13-1021) 国家自然科学基金项目(51474210)
【分类号】：TD75

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