基于采空区漏风量的遗煤温度预测模拟分析

Simulation Analysis of Residual Coal Temperature Prediction Based on Air Leakage Volume of Goaf

为了能够依据采空区漏风量判定遗煤温度,利用理论分析和数值模拟方法,对采空区漏风量与遗煤温度场的关联性进行了分析。以五龙矿某工作面为例,对其遗煤自燃过程进行了数值模拟,分析了工作面供风量和遗煤温度与采空区漏风量的关系,得到了相关函数关系式。结果表明:随着遗煤温度的升高,采空区漏风量逐渐增加,并且漏回风量增加的幅度逐渐大于漏入风量增加的幅度,漏风量与遗煤温度之间近似存在二次抛物线函数关系;提出了采空区相对漏风变化率的概念,其与遗煤温度间存在近似对数函数关系;给出了影响采空区漏风量的其它因素,判定遗煤温度时要注意这些因素的影响。

In order to find the relation between air leakage volume of goaf and temperature of residual coal,the relevance of air leakage volume to the temperature of residual coal was studied by using the methods of theoretical analysis and numerical simulation.The process of residual coal spontaneous combustion was studied by using the method of numerical simulation—taking a working face of Wulong mine as an example.The relations between the air leakage volume of goaf and the air supply of working face and the temperature of residual coal were analyzed,and the equations of function were obtained.The results show that with the temperature increasing of residual coal,the air leakage volume of goaf becomes larger.The increase of the air leakage volume of return is larger than the increase of air leakage volume of inlet gradually.The relationship between the air leakage volume and the temperature of residual coal is a parabolic function.The concept of relative change rate of the air leakage volume is given,and the relationship between it and temperature of residual coal is a logarithmic function.Other influencing factors are mentioned,and the influences of the other factors must be considered when the temperature of residual coal is forecasted.