【作者】 崔永国；

【导师】 李成武；

【作者基本信息】 中国矿业大学（北京） ， 安全技术及工程， 2014， 博士

【摘要】 本文采用理论分析、模型试验和数值分析相结合的方法，研究得出了瓦斯突出气体逆流规律及致灾范围。分析了瓦斯突出后的气体运移及逆流过程，基于相似试验原理，建立了瓦斯突出气体运移逆流试验系统，定量进行了瓦斯突出气体直巷运移和交叉巷道逆流试验，分析了气体浓度时空分布规律的影响因素，改进得到了瓦斯突出气体紊流弥散运移数学模型，瓦斯运移浓度衰减规律符合负指数函数，交叉巷道瓦斯逆流具有“逆流-回流”过程，呈现双峰值特征；根据修订模型，定量划分了瓦斯突出后的井巷危险区域，计算实证了瓦斯突出气体逆流范围。采用Fluent软件模拟了瓦斯突出气体逆流过程，与模型试验的浓度变化趋势一致；定量分析了井下掘进工作面瓦斯传播运移规律，验证了模型适用性。研究结果对瓦斯突出事故应急响应、预防次生灾害和应急救援提供了理论支持。更多还原

【Abstract】 This dissertation arrives at multiple laws of gas migration and backward flowafter gas outburst and hazard scope by applying such research methods as theoreticalanalysis, model experiment and numerical analysis. It analyzes the features of gasoutburst and based on the similar experiment principle of flow in flow field, itestablishes a system of the experiment of gas outburst migration and backward flow.It conducts a quantitative experiment of gas outburst migration in straight roadwayand backward flow in intersection roadway. It also makes an analysis of the influentialfactors of principles of the spatial and temporal distribution of gas concentration. Inaddition, this dissertation derives a mathematical model of the diffusion and migrationof gas outburst turbulence by modification. It proves that the law conforms toattenuation of the concentration of gas migration accorded with negative exponentialfunction and the process of gas backward flow in intersection roadway contains―backward-regressive‖airflow, and represents the feature of double peak. It furthermakes a quantitative demarcation of the dangerous areas of the roadway after gasoutburst in light of the modified model and calculates the backward airflow areas. Italso uses Fluent to simulate the process of backward flow after gas outburst, showingthat the readings fit in with the results of the test. Finally, this dissertation makes aquantitative analysis of the law of gas migration and diffusion in the driving faceunderground, verifying the serviceability of the model. It is hoped that these researchfindings will render firm support to emergency response to accidents, prevention ofsecondary disasters, and emergency rescue.更多还原