煤层注水中添加粘尘棒降尘试验

Test of Dust Fall by Adding the Dust-adhering Bar when Coal Seam Water-infused

提出了在煤层注水钻孔中，添加具有降低注入水表面张力和防止水分蒸发双重功效的粘尘棒，提高注水效果的新方法．测定了不同注水方法润湿煤体的效果；分别采用浸润法和煤壁刻槽法测定了粘尘棒防蒸发性能；进行了普通注水与添加粘尘棒注水降尘的对比试验．研究结果表明，注水时添加粘尘棒不仅可以有效地防止注入水分的蒸发，而且还可大幅提高煤层注水的降尘效果．

A new method was presented that adding the dust-adhering bar into the drilling hole in coal seam can decreases the infused water's surface tension and prevents vaporization for improving the infusion effect. The effect of different infustion water methods to humidify coal seam were determined. The awash method and carve wall method were taken to measure the dust-adhering bar's function to prevent vaporization. The test of adding dust-adhering bar into infused water was compared with that of generally water-infusing. The result showed that adding the dust-adhering bar into the drilling hole in coal seam can effectively prevent the infused water from vaporization, and greatly improve the dust fall effect of water infused into coal seam.