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潜孔钻机广泛用于岩石穿孔,而用于土质和土夹石地质条件下作业则不多。现将我们在这样的地质条件下作业的情况介绍如下。我部在莲花山士石场上使用KQ-150型潜孔钻机二台,施工现场地质条件复杂,有一些地段纯属砂、粘土,厚度达三米左右,硬度f=12,钻机捕尘取用干式和湿式两种。当钻机穿凿到土层时,如按钻机的正常作业方式进行,进尺不到30厘米,钻头中心排风孔和钻头花键槽等地方被土挤压进去(KQ-150钻机配用C150B冲击器)堵塞气道,造成冲击器不冲击,要将钻具拆卸清洗后才能使用。有时为了防止土堵塞钻头,而频繁地增加空打,造成
DTH drilling rigs are widely used for rock perforation, and few are used for geotechnical and earth-rock conditions. Now we are operating in such geological conditions are described below. I use the KQ-150 DTH drilling rig at LianShan Mountain Stone Farm. The geological conditions are complex at the construction site. Some of the sites are purely sand and clay, with a thickness of about three meters and a hardness of f = 12. With dry and wet two. When the drill drilled into the soil, such as drilling according to the normal operation, the footage is less than 30 cm, drill center vent and drill spline groove and other places were squeezed into the soil (KQ-150 rig equipped with C150B impactor) Blocking the airway, causing the impactor does not impact, to be removed after the drilling tool can be used. Sometimes in order to prevent the earth plug drill, and frequently increase the open hit, resulting