采空区流场及氧浓度场模型分析及数值模拟研究

doi:10.11799/ce201907023

Abstract

Abstract: Spontaneous combustion in gob is a complex process and studying on the variation and influence factors of airflow field and oxygen concentration field is the prerequisite to forecast high temperature in gob. Firstly, the mathematical model of flow field and oxygen concentration field under moving coordinates is established, and then the dimensionless form of the model is studied. At the same time dimensionless criteria such as dimensionless pressure, dimensionless velocity, dimensionless oxygen diffusion coefficient, and dimensionless oxygen consumption velocity coefficient are defined. Through analysis, residual coal thickness is an important factor of spontaneous combustion in gob. Finally, the distribution map of the oxygen concentration field under different thickness of the residual coal is obtained by numerical simulation, concluding that the distribution of oxygen in the goaf is wider with the thickness of the residual coal is decrease.

CLC Number:

TD75

References 15

[1]	姚建, 田冬梅. 矿井火灾防治[M]. 煤炭工业出版社, 2012.
[2]	宋立忠. 采空区自燃火灾危险及防治技术之研究[J]. 化工管理, 2018(21): 78.
[3]	Liu W, Qin Y. Multi-physics coupling model of coal spontaneous combustion in long wall gob area based on moving coordinates[J]. Fuel, 2017, 188:553-566.
[4]	周延, 孟倩, 李骏, 等. 采空区自燃带数值模拟方法研究[J]. 中国矿业大学学报, 2014, 43(06): 963-968.
[5]	张辛亥, 席光, 陈晓坤, 等. 近距离煤层群开采自燃危险区域划分及自燃预测[J]. 煤炭学报, 2005(06): 733-736.
[6]	李宗翔. 综放沿空巷周围煤体自燃升温过程的数值模拟[J]. 煤炭学报, 2004(01): 61-65.
[7]	王月红. 移动坐标下采空区自然发火的有限体积法模拟研究[D]. 中国矿业大学（北京）, 2009.
[8]	刘伟. 采空区自然发火的多场耦合机理及三维数值模拟研究[D]. 中国矿业大学（北京）, 2014.
[9]	秦跃平, 刘伟, 杨小彬, 等. 基于非达西渗流的采空区自然发火数值模拟[J]. 煤炭学报, 2012, 37(07): 1177-1183.
[10]	刘宏波. 综放工作面采空区自然发火三维数值模拟研究[D]. 中国矿业大学(北京), 2012.
[11]	朱建芳, 蔡卫, 秦跃平. 基于移动坐标的采空区自然发火模型研究[J]. 煤炭学报, 2009, 34(08): 1095-1099.
[12]	J. Bear. 多孔介质渗流力学[M]. 李竞生, 陈崇希译, 北京: 中国建筑工业出版社, 1983.
[13]	朱建芳, 秦跃平, 杨小彬, 等. 采空区自燃理论模型的无因次分析与应用[J]. 煤炭学报, 2016, 41(10): 2626-2630.
[14]	秦跃平, 王健, 郝永江, 等. 基于有限体积法的巷道围岩散热无因次分析[J]. 矿冶工程, 2013, 33(03): 5-7+12.
[15]	郭丹丹. 停采状态下采空区自然发火三维数值模拟软件开发研究[D]. 中国矿业大学(北京), 2018.

Model Analysis and Numerical Simulation of Flow Field and Oxygen Concentration Field in Goaf

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