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YS—74型无簧式双作用液动冲击器是勘探技术研究所研制的一种新型冲击器。84年和85年先后有四台冲击器在湖北省第一探矿大队3个矿区、12个钻孔进行了钻进，并取得了明显的技术经济效果，到85年9月使用冲击器钻进了1103.55米，最大孔深327.21米。冲击回转钻进最高台月效率达1380米，最高台班进尺37.63米，最高时效12.12米，最大回次长度5.44米，另外施工钻孔质量好，材料成本低，钻头平均寿命提高，事故少，纯钻进时间利用率高，受到了工人们的欢迎。
YS-74-type spring-type double-acting hydraulic impactor is a new type of impactor developed by the Institute of Exploration Technology. In 1984 and 1985, there were four impactors successively drilled in three mines of the First Exploration Brigade in Hubei Province. Twelve boreholes were drilled and obvious technical and economic effects were achieved. By September 2015, they were drilled with impactors 1103.55 meters, the maximum hole depth of 327.21 meters. Impact rotary drilling the highest Taiwan and Taiwan efficiency of 1380 meters, the maximum bench into the 37.63 meters, the maximum time of 12.12 meters, the maximum length of 5.44 meters back, while the construction of good drilling quality, low material costs, the average life expectancy increased bit less accidents, Pure drilling time utilization rate is high, by the workers welcome.