综采割煤粉尘运移影响因素的数值模拟

为解决综采割煤粉尘质量浓度高的问题，获取粉尘控制的合理参数，改善作业环境，以邢东矿2225工作面为研究背景，依据气固两相流理论，运用Fluent软件对综采工作面割煤粉尘运动规律进行数值模拟，并与现场实测的粉尘质量浓度分布情况进行对比分析，模拟结果与实际数据基本一致.研究结果表明：工作面风速、采煤机滚筒转速、溜子速度以及壁面条件是影响综采工作面粉尘质量浓度分布的几个重要因素.当工作面平均风速在1.4m·s^-1，滚筒转速不超过2.5rad·s^-1，溜子速度不超过1.5m·s^-1，防降尘效果最佳.同时洒水保持煤壁湿润也起到一定的捕尘作用.

Numerical simulation of influencing factors on dust movement during coal cutting at fully mechanized working faces

To resolve the problem of high dust concentration during the process of coal cutting at fully-mechanized working faces and obtain rational dust control parameters, as well as to meliorate working conditions, considering No. 2225 working face in Xingdong Mine as a research background, numerical simulation was performed using FLUENT software to track dust movement laws during coal cutting at the fully-mechanized working face based on the theory of gas-solid two-phase flow. Compared with the actual dust concentration distribution in the mine, the simulation results are basically consistent with the actual data. The wind velocity at the fully-mechanized working face, shearer drum rotation speed, valve speed, and wall condition mainly affect the dust concentration distribution at the fully-mechanized working face. It is concluded that the dust removal effect is better when the average wind velocity is 1. 4 m·s-1, the drum rotation speed is no more than 2. 5 rad·s-1, and the valve speed is less than 1. 5 m·s-1. Meanwhile, sprinkling water, which can keep the coal wall moist, plays a significant role in capturing dust.