工程科学学报2016，Vol.38Issue(10)：1350-1358,9.DOI:10.13374/j.issn2095-9389.2016.10.002
非均质孔隙率采空区氧化升温规律四维动态模拟
4 D dynamic simulation of coal oxidation heating law in gobs with heterogeneous porosity
摘要
Abstract
Using the Fluent dynamic mesh model to realize the 4D dynamic movement of a gob and inputting the kinetic mecha-nism of coal low-temperature oxidation and the dynamic change of heterogeneous porosity into Fluent through the user defined function, 4D dynamic simulation is performed on the spontaneous heating law in a gob for U+L ventilation of a certain mine. The results show that unsteady heterogeneous porous media can be more realistic in response to the change of porosity, which exponentially decreases with time. The greater the advancing speed of the working face, the smaller the heating rate, and the average heating rate at an advan-cing speed of 3. 6 m·d-1 is 1/5 of that at an advancing speed of 1. 2 m·d-1 . However, the higher the advancing speed, the deeper the depth of the high temperature region, which is unfavorable for the prevention from spontaneous combustion of coal. Because of the existence of a tail roadway in the gob, the temperature field expands, the temperature rises, the main way to release CO is the tail roadway, and the amount of CO from the tail roadway is 10 times that from the outlet. Finally, the results are verified by the field test data, indicating that the simulation results are correct and reliable.关键词
采空区/非均质孔隙率/煤燃烧/氧化升温/四维/动态模拟Key words
gobs/heterogeneous porosity/coal combustion/oxidation heating/four-dimensional/dynamic simulation分类
矿业与冶金引用本文复制引用
周佩玲,张英华,黄志安,袁飞,高玉坤,王辉,孙倩..非均质孔隙率采空区氧化升温规律四维动态模拟[J].工程科学学报,2016,38(10):1350-1358,9.基金项目
国家自然科学基金资助项目(51474017) （51474017）
新疆维吾尔族自治区基金资助项目(2014211B013) （2014211B013）
