Simulation and experimental study of radial jet blowing–suction air curtain dust control technology in auxiliary haulage roadways of coal mines

IF 4.6 2区工程技术 Q2 ENGINEERING, CHEMICAL

Powder Technology Pub Date : 2025-10-04 DOI:10.1016/j.powtec.2025.121709

Deji Jing , Qisheng Kan , Yabin Li , Shuaishuai Ren , Mingxing Ma , Jichuang Ma , Ping Chang

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引用次数: 0

Abstract

The widespread adoption of trackless rubber-tyred vehicles in coal mines enhances production efficiency but exacerbates dust pollution in auxiliary haulage roadways, endangering workers' health. To effectively solve this problem, we developed a radial jet blowing–suction air curtain dust control technology. Through numerical simulations, the effects of the jet velocity and blowing duct arrangement on dust control performance were analyzed, identifying optimal dust control parameters: a 25 m/s jet velocity with a blowing duct at position B (0.8 m behind the side directly facing the suction duct). An experimental platform was established on the basis of similarity theory. Through smoke tracing and dust control experiments, single air curtain and blowing–suction air curtain were compared, further validating their effectiveness. Finally, by applying radial jet blowing–suction air curtain dust control technology to the auxiliary haulage north roadway of the Qipanjing Coal Mine, air curtain performance tests were conducted. The dust removal efficiency behind the air curtain exceeded 85 %, whereas the dust removal efficiency ahead of the air curtain exceeded 90 %, which was significantly higher than that behind it. Additionally, for the same test cross-section, the dust removal efficiency increases closer to the blowing outlet. The newly developed air curtain dust control technology provides an effective method for controlling dust in coal mine auxiliary haulage roadways.

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煤矿辅助运输巷道径向射流吹吸风幕除尘技术的仿真与试验研究

煤矿普遍采用无轨胶轮车，提高了生产效率，但也加剧了辅助运输巷道的粉尘污染，危害工人健康。为了有效地解决这一问题，我们开发了径向射流吹吸风幕除尘技术。通过数值模拟，分析了射流速度和风管布置方式对除尘性能的影响，确定了最优的除尘参数：射流速度为25 m/s，在B位置（正对吸尘管一侧后0.8 m处）安装风管。基于相似理论建立了实验平台。通过示烟抑尘实验，对单风幕和吹吸风幕进行了对比，进一步验证了其有效性。最后，将径向射流吹吸风幕降尘技术应用于七盘井煤矿辅助牵引北巷，进行了风幕性能试验。气幕后的除尘效率超过85%，气幕前的除尘效率超过90%，明显高于气幕后。此外，对于相同的测试截面，越靠近吹风出口，除尘效率越高。新开发的风幕降尘技术为煤矿辅助运输巷道降尘提供了一种有效的方法。

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来源期刊

Powder Technology 工程技术-工程：化工

CiteScore

9.90

自引率

15.40%

发文量

1047

审稿时长

46 days

期刊介绍： Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests: Formation and synthesis of particles by precipitation and other methods. Modification of particles by agglomeration, coating, comminution and attrition. Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces). Packing, failure, flow and permeability of assemblies of particles. Particle-particle interactions and suspension rheology. Handling and processing operations such as slurry flow, fluidization, pneumatic conveying. Interactions between particles and their environment, including delivery of particulate products to the body. Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters. For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.