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高压液体（主要指水）通过喷射装置形成射流，进行粉碎和切割岩石、快速钻孔和隧峒开挖等。本文就高压水射流在钻探方面的应用作一些介绍。高压射流技术在美国和日本已成功地研究应用于凿岩作业，比凿岩机提高效率2～3倍。开挖隧道效率日进尺高达60米。一、高压射流的冲击破坏作用水压为5～20公斤/平方厘米的射流，可以使钻孔冲洗液进行反循环、搅拌泥浆、开挖土层和进行抽水试验；水压提高到200—300公斤/平方厘米时可以采
High-pressure liquid (mainly water) forms a jet through a jetting device for comminution and cutting of rock, rapid drilling and excavation of tunnels. This article describes some of the applications of high pressure water jets in drilling. High-pressure jet technology in the United States and Japan have successfully studied the application of drilling operations, drilling rigs to improve efficiency than 2 to 3 times. Excavation of tunnel efficiency day footage up to 60 meters. First, the impact of high-pressure jet impact damage Water pressure of 5 to 20 kg / square centimeter of the jet, you can make drilling fluid reverse circulation, mixing mud, excavation of soil and pumping test; water pressure increased to 200-300 Kg / cm2 can be taken