复杂条件下综采采空区自燃“三带”划分数值模拟

朱云辉;唐明云;夏仕伯

doi:10.3981/j.issn.1000-7857.2011.12.010

科技导报 >

2011 , Vol. 28 >Issue 11-12: 67 - 70

DOI: https://doi.org/10.3981/j.issn.1000-7857.2011.12.010

研究论文

复杂条件下综采采空区自燃“三带”划分数值模拟

朱云辉;唐明云;夏仕伯

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1. 淮南职业技术学院通风安全系，安徽淮南 2320012. 安徽理工大学能源与安全学院，安徽淮南 2320013. 淮南矿业（集团）有限责任公司安全开采总院，安徽淮南 232001

收稿日期: 2010-11-19

修回日期: 2011-01-28

网络出版日期: 2011-04-22

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Numerical Simulation of Distribution of Spontaneous Combustion "Three-Zone" Division in Fully Mechanized Goaf Under Complicated Situation

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Received date: 2010-11-19

Revised date: 2011-01-28

Online published: 2011-04-22

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摘要

受复杂地质条件影响，用埋管取样分析方法划分采空区“三带”有诸多限制，采用数值模拟方法成为分析采空区“三带”的主要手段。本文利用Fluent流体力学模拟软件，对淮南矿业集团潘北1121(3)综采工作面采空区进行流场模拟，并根据采空区内漏风风速划分指标确定了“三带”的位置及范围。结果表明，氧化带的宽度在40.0m左右，以此推论工作面采空区内部自然发火的可能性较小。最后，改变工作面的供风量，得出不同供风量对采空区“三带”位置和范围的影响。模拟结果显示，工作面的供风量越大，采空区“氧化带”位置越向采空区深部延伸，且“氧化带”的范围越大。

关键词： 复杂条件; 采空区; 自燃发火; “三带”划分

本文引用格式

朱云辉;唐明云;夏仕伯 . 复杂条件下综采采空区自燃“三带”划分数值模拟[J]. 科技导报, 2011 , 28(11-12) : 67 -70 . DOI: 10.3981/j.issn.1000-7857.2011.12.010

Abstract

Under the influence of the complicated geological conditions, the method of sampling analysis by pipe for dividing "three-zone" in the goaf has many limitations. Utilizing the method of numerical simulation to analyze "three-zone" in the goaf becomes the main means. The fluid mechanics calculation software, Fluent is applied to simulate the air leakage flow field status in the goaf of 1121(3) working face of Panbei Mine, Huainan Mining Group, and then the "three-zone" of goaf location and area are obtained according to the air leakage flow field simulation result. The results show that the width of "oxidation-zone" is about 40 meters. Considering the coal spontaneous combustion stage is three to six months, it is impossible that the residual coal in the goaf is spontaneously combusted during a working face mining process. At last, the different air leakage flow field status in the goaf is obtained under the condition of different ventilation quantity. It is found that the more ventilation quantity is provided, farther away from the working face the location of
"oxidation-zone" is and the wider extent of "oxidation-zone" is.

Key words： complicated conditions; goaf; spontaneous combustion; “three-zone” dividing

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