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TBM盾构机掘进巷道干式高效控除尘技术研究

Research on the technology of dry efficient dust control in TBM shield machine tunneling roadway

  • 摘要: 随着掘进工作面机械化程度提升至90%以上,矿井产能增加导致的粉尘污染问题日益突出。针对快速掘进现有防尘体系及通风除尘系统存在的问题,以高家堡煤矿全断面隧道掘进机(TunnelBoring Machine,TBM)掘进过程为研究对象,采用调研、数值模拟和现场验证相结合的研究方法,提出了一种附壁旋流通风与干式除尘器协同控尘技术。数值模拟结果表明,该技术可在快速掘进工作面形成1条高速风幕,实现对TBM产尘源的有效阻隔,将呼吸性粉尘控制在距掘进工作面5 m范围内。现场试验结果表明,高家堡煤矿西区胶带大巷掘进工作面各采样点的粉尘质量浓度均低于150 mg/m3,与原有通风方式相比,控尘效率可达85%以上。

     

    Abstract: At present,the mechanization degree of the driving face increased to more than 90%,and the coal dust pollution caused by the increase of mine production has also increased. In view of the problems existing in the dust control system and the ventilation and dust removal system of rapid driving,the driving process of the Tunnel Boring Machine(TBM) in Gaojiapu Coal Mine was studied. Based on the combined research method of investigation, numerical simulation and field verification, a collaborative dust control technology of wall-attached swirling wind and dry precipitator was proposed. The numerical simulation results show that the technology can form a high-speed air curtain in the rapid driving face,which can effectively block the dust source of TBM. The respirable dust is controlled within 5 m from the driving face. The field test results show that the dust mass concentration at each sampling point in the driving face of Gaojiapu Coal Mine is lower than 150 mg / m3,and the dust control efficiency can reach more than 85% compared with the original ventilation method.

     

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