采煤工作面空气幕隔热技术

Air Curtain Isolation Thermal Technology of Coal Face

针对采煤工作面降温时风流漏入采空区进行热交换,再将采空区的热量带入工作面,影响工作面降温效果的问题,提出了一种利用空气幕阻隔风流进入采空区的技术并对采空区漏风量及热量进行计算。在工作面液压支架下方两柱之间设置1组空气幕,防止风流进入采空区。选取唐口煤矿1302工作面作为仿真模型,运用ANSYS FLUENT软件对阻隔风流前后工作面三维空间内温度场的分布特点以及变化规律进行数值模拟。结果表明:采用空气幕后在漏风影响的区域内温度下降较为明显,温度降低接近2℃,此时工作面内大部分区域温度≤26℃。

In view of the problem that the air flow leaks into the goaf when the coal face cools down, and then the heat of the goaf is brought into the coal face to affect the cooling effect of the coal face, we proposed a technique of using air curtain to block air flow into the goaf, and the air leakage and heat quantity in the goaf. A set of air curtain is set between two columns under the hydraulic support of the working face to prevent air flow from entering the goaf. In this paper, 1302 coal face of Tangkou Coal Mine was selected as the simulation model, and the distribution characteristics and variation laws of temperature field in the threedimensional space of the working face before and after blocking wind flow were simulated by using the software of ANSYS FLUENT. The results show that the air temperature drop in the air leakage influence area after the use of air curtain is relatively obvious, and the temperature is reduced nearly 2 ℃, at this point, the temperature in most area of the working face is less than or equal to 26 ℃.