布风器在掘进工作面通风除尘中的应用模拟

发布时间：2018-05-27 20:27

本文选题：掘进工作面 + 布风器　；参考：《煤矿安全》2015年11期

【摘要】：为了从控制风流的角度协同解决掘进面通风除尘难题,设计使用布风器将传统的压入式风筒轴向直吹机掘工作面的送风方式改为沿巷道壁的径向风流。使用数值模拟对比分析了有无布风器条件下掘进面的通风除尘效果,通过试验研究了布风器不同出口断面积、安装角度时的通风除尘特性,结果表明:基于布风器通风时,巷道中的风流呈现出明显的旋转,大部分风速与主体风速相同,离掘进面越远粉尘浓度越低,大部分粉尘都被隔绝在了抽尘风筒的入口处附近,只有少量粉尘逸散出来,巷道内粉尘浓度较低,工作环境较好。距掘进头2 m以内时,使用布风器的通风方式时巷道中呼吸带的粉尘浓度高于不加布风器,但之后降低,而且在距离5 m左右时下降尤为明显,由900 mg/m3下降为540 mg/m3,距离掘进头23 m以后,粉尘浓度降为100 mg/m3以下。布风器安装角度为30°,出口断面积介于0.5~0.6 m2时,风量稳定风阻较小,有利于除尘和排除瓦斯,使矿井通风除尘达到较佳效果。
[Abstract]:In order to solve the problem of ventilation and dust removal in drivage surface from the angle of controlling air flow, the traditional air supply mode of axial direct blowing face of pressure tube is changed to radial air flow along the wall of roadway by using air distributor. By using numerical simulation, the ventilation and dust removal effect of drivage face under the condition of air distributor is compared and analyzed. The ventilation and dust removal characteristics of different outlet sectional area and installation angle of air distributor are studied through experiments. The results show that: based on the ventilation of air distributor, The wind flow in the roadway showed an obvious rotation. Most of the wind speed was the same as the main wind speed. The farther away from the heading surface, the lower the dust concentration was, and most of the dust was isolated near the entrance of the dust extraction duct, with only a small amount of dust released. The dust concentration in roadway is lower and the working environment is better. The dust concentration in the breathing zone in the roadway is higher than that in the non air distributor when the ventilation mode is less than 2 m from the first 2 m of the tunneling, but then decreases, and the decrease is especially obvious when the distance is about 5 m. The dust concentration decreased from 900 mg/m3 to 540 mg / m ~ (3), and the dust concentration decreased below 100 mg/m3 after the first 23 m of tunneling. When the installation angle of the air distributor is 30 掳and the outlet area is between 0.5 and 0.6 m2, the steady air flow resistance is small, which is beneficial to dust removal and gas removal, and makes the mine ventilation and dust removal achieve a better effect.
【作者单位】：煤炭科学技术研究院有限公司;煤炭科学研究总院煤炭资源高效开采与洁净利用国家重点实验室;北京市煤矿安全工程技术研究中心;
【基金】：国家国际科技合作专项基金资助项目(2015DFR70900) 中国煤炭科工集团科技创新基金资助项目(2012MS001) 煤炭科学研究总院科技发展基金资助项目(2012JC11)
【分类号】：TD714.43

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