突出瓦斯—粉煤流冲击动力效应的理论和实验研究

发布时间：2018-03-04 22:31

本文选题：瓦斯-粉煤流　切入点：流场显示　出处：《中国矿业大学（北京）》2013年博士论文　论文类型：学位论文

【摘要】：本文通过实验研究了瓦斯-粉煤两相流体冲击动力学特征，基于弹性力学和热力学的理论分析得到了突出后煤岩在内外部瓦斯压力作用下粉化过程的“爆米花”效应；基于两相流体力学理论分析了可压缩两相流体在巷道内的流动规律；通过激光纹影系统对瓦斯-粉煤两相流体冲击障碍物、掘进机模型、反向防突风门、人模型的过程进行了流场显示，开展了突出后粉煤“分选”性实验和突出过程的动力观测实验；利用两相冲击动力学对冲击致灾过程进行了定性分析；为验证理论分析和实验结果的正确性，利用计算流体力学软件对冲击气流在巷道内运移规律及对掘进机和防突风门的冲击动力效应进行了数值模拟；最终对群力煤矿“11.8”瓦斯突出事故进行了实证分析。本论文为煤与瓦斯突出后的致灾机理及效应的研究提供了基础的理论支持，对突出后的防灾减灾工作具有十分重要的现实意义。
[Abstract]:Based on the theoretical analysis of elasticity and thermodynamics, the effect of popcorn on the pulverization process of outburst coal under the action of internal and external gas pressure is obtained. Based on the theory of two-phase hydrodynamics, the flow law of compressible two-phase fluid in roadway is analyzed. The flow field of the human model is displayed, the separation experiment and the dynamic observation experiment of the outburst coal are carried out, and the impact process is qualitatively analyzed by using the two-phase impact dynamics. In order to verify the correctness of theoretical analysis and experimental results, numerical simulation was carried out on the movement law of impact airflow in roadway and the impact dynamic effect of roadheader and anti-outburst valve by using computational fluid dynamics software. Finally, an empirical analysis of the "11.8" gas outburst accident in Qunli Coal Mine is carried out. This paper provides a theoretical basis for the study of the mechanism and effect of gas outburst caused by coal and gas outburst. It is of great practical significance to the work of disaster prevention and mitigation.
【学位授予单位】：中国矿业大学（北京）
【学位级别】：博士
【学位授予年份】：2013
【分类号】：TD713

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