动态采空区非线性氧化升温相似试验研究

doi:10.16265/j.cnki.issn 1003-3033.2020.11.014

中国安全科学学报 ›› 2020, Vol. 30 ›› Issue (11): 95-100.doi: 10.16265/j.cnki.issn 1003-3033.2020.11.014

动态采空区非线性氧化升温相似试验研究

周佩玲¹ 助理研究员, 袁飞^2,3 讲师, 赵鹏霞¹ 助理研究员

1 北京城市系统工程研究中心,北京 100035;
2 北京科技大学冶金与生态工程学院,北京 100083;
3 北京科技大学钢铁冶金新技术国家重点实验室,北京 100083

收稿日期:2020-08-07 修回日期:2020-10-10 出版日期:2020-11-28 发布日期:2021-07-15
作者简介:周佩玲 (1988—),女,甘肃天水人,博士,助理研究员,主要从事公共安全应急科技与管理、煤矿安全、火灾成因理论及预防等方面的研究。E-mail:pellyzhou@163.com。
基金资助:
国家重点研发计划项目(2018YFC0809700)。

Similar experimental study on non-linear oxidation heating up process of coal in dynamic gob areas

ZHOU Peiling¹, YUAN Fei^2,3, ZHAO Pengxia¹

1 Beijing Research Center of Urban System Engineering, Beijing 100035, China;
2 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;
3 State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China

Received:2020-08-07 Revised:2020-10-10 Online:2020-11-28 Published:2021-07-15

摘要/Abstract

摘要： 为深入研究采空区遗煤的氧化升温特征,利用容积平均法构建传热传质模型,搭建采空区氧化升温相似试验台,试验研究采空区遗煤氧化的非线性升温过程,并通过现场试验数据验证相似试验的结果。结果表明:采空区温度场中,高温区域主要集中在进风侧,并且随着工作面动态推进,不断向前迁移,采空区温度随时间呈指数增长;工作面推进速度是影响采空区温度升高的重要因素,推进速度越快,采空区升温速率越小,其中,工作面推进速度与采空区最高温度之间呈负指数减小的关系;同时,随着工作面推进速度的加快,采空区高温点位置距工作面距离不断增加;采空区特征点升温曲线拟合结果显示,现场试验值与相似模拟值基本吻合,证明了相似试验的合理性。

关键词: 动态采空区, 氧化升温, 相似试验, 遗煤自燃, 工作面推进速度

Abstract: In order to explore deeper into oxidation heating characteristics of residual coal in gob areas, a similar experimental platform was built based on heat and mass transfer model which was established by volume average method. Nonlinear heating up process of such residual coal was studied and similar experiment results were verified by field test data. The results show that high temperature area mainly concentrates on air inlet side, and it will move forward along with advancing of working face while temperature in gob areas increase exponentially over time. Advancing speed of working face is a main factor that influences oxidation heating up process, the faster it is, the smaller heating rate of gob will be, and there is a negative exponential reduction relationship between it and maximum temperature in gob. Meanwhile, along with its increase, depth of maximum temperature point increase gradually. According to fitting curves of characteristic points' heating up in gob, it is also found that experimental results are basically consistent with that of field experiment, which proves rationality of similar experiment.

Key words: dynamic gob areas, oxidation heating up, similar experiment, spontaneous combustion of coal, working face advancing speed

周佩玲助理, 袁飞, 赵鹏霞. 动态采空区非线性氧化升温相似试验研究[J]. 中国安全科学学报, 2020, 30(11): 95-100.

ZHOU Peiling, YUAN Fei, ZHAO Pengxia. Similar experimental study on non-linear oxidation heating up process of coal in dynamic gob areas[J]. China Safety Science Journal, 2020, 30(11): 95-100.

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动态采空区非线性氧化升温相似试验研究

Similar experimental study on non-linear oxidation heating up process of coal in dynamic gob areas

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