煤矿区地面注浆多分支水平井装备及技术

Research on Equipment and Technology of Ground Grouting Multi-branch Horizontal Well in Coal Mining Area

地面注浆技术是煤矿水害防治的有效方法,注浆多分支水平井是地面注浆技术实施的基础。结合矿区地质条件、钻井工艺、注浆工艺等特点,优选注浆井施工用车载钻机、稀土永磁直驱泥浆泵、电磁波无线随钻测量系统、固控系统等装备,并对注浆井钻孔结构、轨迹控制、套管施工等关键技术进行研究。形成一套适用于注浆多分支水平井用钻井装备及关键技术,对煤矿水害防治工作具有重要意义。

Ground grouting technology is effective method to prevent and control coal mine water hazard, and grouting multi-branch horizontal well is the foundation of ground grouting technology. Combined the characteristics of geological conditions,drilling techniques and grouting techniques, the truck-mounted drilling rig, rare-earth permanent magnet direct drive mud pump,EMWD and solid control system were selected, which were suitable for grouting well. The key technologies such as drilling structure, trajectory control, casing construction were studied. A set of drilling equipment and key technologies for grouting multibranches horizontal well was formed, it had great significance to prevent and control water hazard in coal mines.