一、Product overview

With the deep mining of coal mine, fast excavation and ground pressure control have been restricting the safe and efficient mining of coal mine, especially the soft rock roadway support is more serious. The traditional underground roadway support adopts U-section steel, I-steel, anchor bolt end support, etc., which has high labor intensity and poor supporting effect, and is not suitable for deep mining of coal mine. U-section steel and I-steel support have been gradually phased out. And the wrong end of the bolt support also gradually revealed the drawbacks, such as: construction steps, after drilling, placing resin, installation of the bolt, rotary bolt machine to apply preload four steps, workers inconvenient operation, and high labor intensity. Therefore, it is necessary to develop a fast, safe and efficient support bolt. After research and tests, our company has developed self-drilling and self-locking anchor injection bolt.

二、Scope of application

Self-drilling rock-injection bolt is mainly used for excavation support or repair and reinforcement of mine roadway, blockchamber and crossover points under complex and difficult conditions such as soft rock, fault fracture zone and high stress zone, and can also be used for reinforcement and reinforcement of rock engineering such as tunnel and slope. It is especially suitable for the geological conditions where the surrounding rock is broken and the common resin cartridge is difficult to put into the borehole normally.

三、Product structure

四、 Construction method