|本期目录/Table of Contents|

[1]李品,褚廷湘,陈兴.工作面动态推进下采空区煤自燃分布特征模拟[J].中国安全生产科学技术,2017,13(10):122-127.[doi:10.11731/j.issn.1673-193x.2017.10.021]
　LI Pin,CHU Tingxiang,CHEN Xing.Simulation on distribution characteristics of coal spontaneous combustion in goaf during dynamic advancing of working face[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(10):122-127.[doi:10.11731/j.issn.1673-193x.2017.10.021]
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工作面动态推进下采空区煤自燃分布特征模拟
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年10期
页码:
122-127
栏目:
现代职业安全卫生管理与技术
出版日期:
2017-10-30

文章信息/Info

Title:
Simulation on distribution characteristics of coal spontaneous combustion in goaf during dynamic advancing of working face
文章编号:
1673-193X(2017)-10-0122-06
作者:
李品; 褚廷湘; 陈兴
（河南理工大学 安全科学与工程学院，河南 焦作 454003）
Author(s):
LI Pin;  CHU Tingxiang;  CHEN Xing
(School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China)
关键词:
工作面; 氧化带; 采空区; 煤自燃; 数值模拟
Keywords:
working face;  oxidation zone;  goaf;  coal spontaneous combustion;  numerical simulation
分类号:
TD75
DOI:
10.11731/j.issn.1673-193x.2017.10.021
文献标志码:
A
摘要:
为了研究动态推进过程中工作面推进距离对采空区煤自燃分布特征的影响，采取及时有效的煤自燃防治措施，以13210综放面为工程背景，基于采空区渗透率分布公式和传热传质控制方程，建立采空区煤自燃数值解算模型。利用COMSOL软件模拟了工作面不同推进距离下以流速和氧体积分数为划分指标的采空区氧化带范围和高温区域的变化规律，分析了高温区域与氧化带的叠加效应。通过现场实测与模拟结果比对，验证了模拟的准确性。研究结果表明：采空区渗透率随着工作面推进距离的增加而不断变化，近工作面端渗透率变化不大，而中深部采空区的渗透率不断减小；采空区氧化带分布随工作面推进距离的增加呈现阶段性变化特征，推进初期氧化带范围不断变化，推进后期氧化带范围趋于稳定；采空区氧化带分布与高温区域重叠深度随工作面推进不断增加，最终稳定于工作面后方60~70 m范围内。
Abstract:
To study the influence of the advancing distance of working face on the distribution characteristics of coal spontaneous combustion in the goaf during the dynamic advancing process of working face, and adopt the timely and effective measures to prevent and control the coal spontaneous combustion, a numerical solution model of coal spontaneous combustion in goaf was established based on the permeability distribution formula and the heat and mass transfer control equations in the goaf through taking the 13210 fully mechanized caving face as engineering background. The change laws of the oxidation zone range and the high-temperature zone in the goaf under different advancing distances of working face with the flow velocity and oxygen volume fraction as the classification indexes were simulated by COMSOL software, and the superposition effect of high-temperature zone and oxidation zone was studied. The accuracy of the simulation was verified by comparing the field measurement results with the simulation results. It showed that the permeability of goaf changed continually with the increase of the advancing distance, and the permeability near the working face had little change, while the permeability in the mid-deep goaf decreased continually. The distribution of oxidation zone in goaf presented the characteristics of stage change with the increase of advancing distance, and the range of oxidation zone changed continually in the early stage of advancing and tended to be stable in the later stage. The overlap depth of the oxidation zone and the high-temperature zone in the goaf increased continually with the advancing of working face, and finally stabilized in the range of 60-70 m behind the working face.

参考文献/References:

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相似文献/References:

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　GAO Jian-liang,WANG Li-feng,YANG Ming.Discussion on setting up methods of the working face physical model in simulation for goaf flow field[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(10):143.[doi:10.11731/j.issn.1673-193x.2014.12.024]

备注/Memo

备注/Memo:
国家自然科学基金项目（51404090，U1361205，51574111）
更新日期/Last Update: 2017-11-03