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煤層注水中粘塵棒溶液對接觸角的影響

Effect of dust-sticking bar's solution on the contact angle of coal seam in infusion

  • 摘要: 研究了煤層注水中添加粘塵棒溶液降低接觸角、縮短接觸潤濕時間的除塵方法.通過測定和分析粘塵棒溶液不同濃度下七種煤樣的接觸角和潤濕時間,比較得出了七種煤樣的臨界表面張力,為35.0 mN/m,發現注入水的表面張力是增加煤層注水濕潤效果的主要因素.該法可以大大提高煤層注水降塵效果,而且添加工藝簡單,方便實用.

     

    Abstract: A dustproof method, adding dust-sticking bar to infusion, was studied. This method can reduce contact angle and shorten wetting time. The contact angle and the wetting time of seven coal samples in the dust-sticking bar's solution with different concentrations were analyzed to obtain the critical surface tension of the seven coal samples. It was concluded that the wetting effect of coal seam infusion primarily lies on the surface tension of injected water. By this method, the dust of coal seam can be greatly decreased and the adding technical process is simple, convenient and practical.

     

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