采空区氧化带与发火期动态演化规律模拟研究

doi:10.16265/j.cnki.issn1003-3033.2018.07.008

中国安全科学学报 ›› 2018, Vol. 28 ›› Issue (7): 45-51.doi: 10.16265/j.cnki.issn1003-3033.2018.07.008

采空区氧化带与发火期动态演化规律模拟研究

董子文^1,2,3 讲师, 齐庆杰^**2,3 教授, 韩光^2,3 副教授, 于文惠¹, 耿伟乐¹ 讲师, 皮子坤^1,2,3 讲师

1 湖南工学院安全与环境工程学院,湖南衡阳 421002;
2 辽宁工程技术大学安全科学与工程学院,辽宁阜新 123000;
3 矿山热动力灾害与防治教育部重点实验室,辽宁阜新 123000

收稿日期:2018-04-07 修回日期:2018-06-01 出版日期:2018-07-28 发布日期:2020-11-25
通讯作者: **齐庆杰(1964—),男,辽宁朝阳人,博士,教授、博士生导师,主要从事矿井火灾防治方面研究。E-mail:dzw2ywh@163.com。
作者简介:董子文(1987—),男,安徽淮北人,博士,讲师,主要从事矿井火灾防治方面研究。E-mail:1316859454@qq.com。
基金资助:
国家自然科学基金面上项目资助(51274113);国家自然科学基金青年项目资助(51804107);湖南工学院引进人才支持计划(HQ2017001)。

Numerical simulation study on dynamical evolution rule of spontaneous combustion oxidation zone and period

DONG Ziwen, QI Qingjie, HAN Guang, YU Wenhui, GENG Weile, PI Zikun

1 School of Safety and Environment Engineering,Hunan Institute of Technology,Hengyang Hunan 421002,China;
2 School of Safety Science and Engineering,Liaoning Technical University,Fuxin Liaoning 123000,China;
3 MOE Key Lab of Mine Thermodynamic Disaster and Prevention,Fuxin Liaoning 123000,China

Received:2018-04-07 Revised:2018-06-01 Online:2018-07-28 Published:2020-11-25

摘要/Abstract

摘要： 为研究采煤工作面开采过程中采空区自燃氧化带的分布与宽度及发火期动态变化规律,利用COMSOL多物理场数值模拟软件,基于变形几何和其他多物理-化学场,以瑞安公司014N₁^-1综放工作面为例,建立采空区自燃动态数值模拟模型,开展采空区遗煤自燃数值模拟研究。结果表明:工作面开采过程中,供风量大、推进速度低,氧化带初次出现所需时间长、发火期短;氧化带最大宽度与时间间有类似“S”型关系,动态非稳定性增加;开采初期氧化带宽度随风量增加而变小,开采稳定阶段,则相反;随开采速度增加,氧化带最大宽度与推进速度的比值(L_max/v_t)变小,自燃危险性降低。

关键词: 采空区, 自燃, 氧化带, 发火期, 动态非稳定性

Abstract: To explore the dynamic variation rule of the width of spontaneous combustion oxidation zone in goaf and the spontaneous combustion period in the process of mining,the 014N^-1₁,fully mechanized caving face in Ruian was taken as an object of study,a COMSOL Multiphysics dynamic numerical simulation model was built,based on deformation geometry and other physical-chemical fields theories.According to the model,the numerical simulation research on the spontaneous combustion in goaf was carried out.The results show that the greater the quantity of wind and the lower the mining velocity,the longer the time,the oxidation zone takes to appear for the first time,will be,and the shorter the spontaneous combustion period will be,that there is a S-shaped relationship between the maximum width of oxidation zone and time,that at the initial stage of mining,the oxidation zone width decreases with the increase of the quantity of wind.At the stable mining phase,the greater the quantity of wind,the wider the oxidation zone width will be,and that the faster the mining velocity,the lower the ratio of the maximum width of oxidation zone to the mining velocity will be,and the smaller the risk of spontaneous combustion will be.

Key words: goaf, spontaneous combustion, oxidation zone, spontaneous combustion period, dynamic instability

中图分类号:

X932

董子文, 齐庆杰, 韩光, 于文惠, 耿伟乐, 皮子坤. 采空区氧化带与发火期动态演化规律模拟研究[J]. 中国安全科学学报, 2018, 28(7): 45-51.

DONG Ziwen, QI Qingjie, HAN Guang, YU Wenhui, GENG Weile, PI Zikun. Numerical simulation study on dynamical evolution rule of spontaneous combustion oxidation zone and period[J]. China Safety Science Journal, 2018, 28(7): 45-51.

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采空区氧化带与发火期动态演化规律模拟研究

Numerical simulation study on dynamical evolution rule of spontaneous combustion oxidation zone and period

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