综放面多尘源粉尘分布规律数值模拟及实测

发布时间：2019-02-19 18:50

【摘要】：为解决综放工作面粉尘浓度高的问题,掌握各作业工序粉尘浓度空间分布规律,有效指导粉尘控制工作,依据气固两相流理论,运用Fluent软件对综放工作面割煤、移架、放顶煤、转载各工序单独及同时作业时的粉尘分布规律进行数值模拟,并与现场实测数据进行对比分析.结果表明:割煤作业粉尘沿采煤机机道扩散的同时向人行道空间扩散,需在滚筒尘源处控尘,并在采煤机外侧采取水幕帘除尘措施;移架作业时人行道粉尘浓度高于机道粉尘浓度,需在机道空间和人行道空间均设置架间喷雾;放煤作业粉尘沿人行道空间分布较大,需在放煤口采取隔尘措施;转载点局部风速大,粉尘影响范围较广,应采取密封等措施.还应在放煤和割煤作业之间增加全断面喷雾降尘装置.
[Abstract]:In order to solve the problem of high dust concentration in fully mechanized caving face, grasp the spatial distribution law of dust concentration in each working procedure, effectively guide the dust control work, according to the theory of gas-solid two-phase flow, use Fluent software to cut coal, move frame and caving coal in fully mechanized caving face. The distribution of dust in each working procedure is simulated separately and simultaneously, and compared with the field measured data. The results show that coal cutting dust diffuses along the shearer's path and spreads to the sidewalk space at the same time, the dust should be controlled at the dust source of the drum, and the dust removal measures with water curtain should be taken on the outside of the shearer. The dust concentration in the sidewalk is higher than that in the roadway when moving the frame, so it is necessary to set up interframe spray in the space of the machine and the sidewalk, and the dust distribution along the sidewalk is larger in the coal drawing operation, so the dust isolation measures should be taken at the coal caving port. The local wind speed of the transfer point is large, and the dust has a wide range of influence, so we should take measures such as sealing and so on. A full-section spray dust control device should also be added between coal drawing and coal cutting operations.
【作者单位】：北京科技大学土木与环境工程学院;北京市劳动保护科学研究所;
【基金】：国家自然科学基金(51274024)
【分类号】：TD714.2

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