煤矿胶带运输巷呼吸性粉尘运移规律及精准控尘除尘技术

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中图分类号：TD714.4 文献标志码：A

Abstract：The belt conveyor roadway is the main operation site for coal transportation.During long-distance conveying，a largeamount ofrespirabledustis generated，increasing both the risk of pneumoconiosisand the potential forcoal dust explosions.At present，dust control methods incoal mine roadways suffer from excessive water consumption，low dust collction efficiency，and unsatisfactory on-site performance.To address these issues，this study investigated themigration paterns of respirable dust and developed precision dustcontrol and removal technologies for coal mine belt conveyor roadways.Using Computational Fluid Dynamics（CFD） softwarecombined with a Digital Elevation Model （DEM），a ful-scale geometric modelof the belt conveyor roadway was constructed to simulate the spatiotemporal evolution of dust polution under airflow disturbances and to analyze the distribution characteristics of high-concentration dust in the pedestrian breathing zone.The analysis results showed that，based on thedust generation characteristics of belt conveyor roadways，the transfer points and belt vibrations were the main continuous sources of dust. Moreover，compared with the right side of the belt conveyor，the left side （pedestrian walkway） had lower air velocity and weaker dilution capacity for dust， providing favorable conditions for dust accumulation and resulting in more severe pollution. The area near the breathing height was relatively open，causing less obstruction to dust migration and forming a long， narrow Zone of high dust concentration near the pedestrian walkway，where dust concentration tends to increase continuously. Toaddress the diffrent dust generation characteristics at transfer points and along the belt，two control technologies were applied： a ful-section cloud-mist dust suppression device and a self-powered intelligent atomizing dust suppression system.Application results showed that the average total dust concentration and average respirable dust concentration in the roadway decreased from 249.75mg/m3 and 171.03mg/m3 to （20 54.16mg/m3 and 21.46mg/m3 ， with total dust and respirable dust removal efficiencies of 76.56% and 75.32% ， respectively.

Key words： belt conveyor roadway; respirable dust; dust migration pattrns; precision dust control and removal; ful-section cloud-mist dust suppression device;self-powered intelligent atomizing dust suppression system

0引言

胶带运输巷是煤炭输送的主要作业场所，带式输送机因其运输能力大、运输效率高、环境适应性强等优点，得到广泛应用与推广[1-2]。（剩余13385字）