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洛阳风动工具厂生产的 YDX—40型岩石电钻,在汾西矿务局水峪矿、平顶山矿务局六矿和新汶矿务局孙村等矿用于煤层注水取得了成功的经验。他们称赞该钻机体积小、效率高、重量轻、搬运容易、安装简单、操作方便。在煤层内打孔,成孔率达99%,水峪矿在煤层钻孔径73毫米的钻孔,可钻进95米。该钻机与150米红旗钻机相比:钻进速度为红旗钻机的2.7倍,红旗钻机需4人操
YDX-40 Rock Drills produced by Luoyang Fengdong Power Tools Factory have gained successful experience in the waterflooding of coal seams in Shuiyu Mine of Fenxi Mining Bureau, Sixth Mine of Pingdingshan Mining Bureau and Suncun Mine of Xinwen Mining Bureau. They praised the drill for its small size, high efficiency, light weight, easy handling, easy installation and easy operation. Drilling holes in the coal seam, forming rate of 99%, Shuiyu Mine Drill hole diameter of 73 mm in the coal seam, drilling 95 meters. Compared with the 150-meter Hongqi drilling rig: the drilling speed is 2.7 times that of the Hongqi drilling rig and the red-flag drilling rig requires 4 persons