旋转水射流割缝提高穿层钻孔抽采效果的试验研究

Experimental Study of Improving Crossing Hole Drainage Effect by Spinning Water Jet Cutting Seam

从旋转射流的理论基础和煤岩失效2个方面对旋转射流割缝的机理进行了研究。通过扩大穿层钻孔直径,增加了煤层暴露面积和卸压范围,提高穿层钻孔的抽放效果。结果证明,旋转水射流割缝技术技术可行,抽采效果显著,是提高穿层钻孔抽采效果的有效途径之一。

The spinning water jet cutting seam mechanism based on the theoretical of spinning water jet and failure mechanism of coal and rock was researched.Through increased crossing hole diameter,exposed area and the area of releasing pressure of coal were increased and gas drainage effect was improved.The result show that spinning water jet cutting seam technology is feasible,the effect of improving crossing holes drilling is obvious,and it is one of feasible technology to improve crossing hole drilling.