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 mechanism of rotary jet kerfing is studied from the theoretical basis of rotating jet and the failure of coal and rock. By expanding the diameter of the borehole through the borehole, the area exposed to the coal seam and the pressure relief range are increased to improve the drainage effect of the borehole through the borehole. The results show that the technology of rotary water jet cutting technology is feasible and the pumping effect is remarkable. It is one of the effective ways to improve the drilling effect of strata drilling.