For the first application of water jet technology in multi - ring hole reaming and on the basis of the laboratory simulation test deep discussion was made and specific technical parameters were determined . the engineering practice has proved its feasibility 首次将水射流技术应用到多环扩孔施工中，在实验室模拟试验的基础上对其进行了深入的探讨，并确定了具体的设计参数，工程实践证明该方法是可行的。
