高温矿井热源对风流稳定性影响的分析

Analysis on influence to airflow stability by heat source in high temperature mine

随着矿井开采深度的逐渐增加,地温升高,产生的高温环境必然会引起矿井通风系统特性的改变。介绍了高温矿井主要热源及其特征,并对它们进行了分类,研究了不同热源产生的热力风压、风流流动热阻力的特点,得到了非水平巷道热力风压影响风流方向的判别式,水平巷道热阻嵌入串、并、角联风路的风流流动规律,确定了热阻嵌入通风网络解算的风量修正公式。根据上述结论,分析了周源山煤矿矿井热源对风流稳定性的影响。结果表明,热阻对分支的风量影响达11.8%。

With the increase of mining depth, the temperature temperature will change the features of mine ventilation system. of soil will increase and the environment with high The main heat sources and their features were intro- duced, and the classification on them was conducted. The characteristics of heat pressure and thermal resistance of airflow produced by different heat sources were studied. The discriminant of airflow direction affected by heat pres- sure in non-horizontal roadway was obtained, as well as the airflow laws when the thermal resistance was embedded in series branches, parallel branches and diagonal branches in horizontal roadway, and the correction formula of air volume when the thermal resistance was embedded in ventilation network resolving. According to the above conclu- sion, the influence to airflow stability by heat source in Zhouyuanshan coal mine was analyzed. The results showed that the thermal resistance will influence the air volume in branches by the rate of 11.8%.