综掘面湍流气室控制-干式净化协同控除尘技术及设备研发

Turbulent air chamber control and dry purification collaborative control technology and equipment development for dust removal in fully mechanized excavation face

  • 摘要: 为解决东滩煤矿6307运顺综掘工作面的粉尘污染问题,研发湍流气室控制-干式净化协同控除尘技术,通过数值模拟与单压通风、压抽混合式通风条件进行比较。结果表明:单压通风条件下,呼吸带高度的平均粉尘浓度可达2 478.4 mg/m3,严重危害掘进司机的身体健康;压抽混合式通风下,粉尘浓度明显降低,当t=100 s时,1 000 mg/m3以上的高浓度粉尘团扩散至距采煤面X=35 m处,最高粉尘浓度可达1 254.8 mg/m3;应用湍流气室控制-干式净化协同控除尘技术能有效抑制粉尘扩散,将粉尘阻隔在X=0~15 m范围内,利用干式除尘风机进行净化,最终研发了湍流气室控制-干式净化协同控除尘设备。

     

    Abstract: This study proposes a turbulent air chamber control and dry purification collaborative control technology for dust removal as a solution to the dust pollution in the Yunshun fully mechanized excavation face 6307 of Dongtan Coal Mine. We compared the conditions of press-in ventilation and pressure-extraction hybrid ventilation through numerical simulation. Results show that the average dust concentration at the height of the breathing zone under single-pressure ventilation could reach 2 478.4 mg/m3, posing serious threat to the health of the equipment operators. Dust concentration was significantly reduced under pressure-extraction hybrid ventilation, with highly concentrated dust clusters above 1 000 mg/m3 diffusing to X=35 m when t=100 s. The highest concentration reached 1 254.8 mg/m3. Applying this turbulent air chamber control and dry purification collaborative control technology for dust removal could effectively inhibits dust diffusion, which is blocked in the range of X=0~15 m, and purified by dry dust removal fan. Corresponding equipment was also developed.

     

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