Handan Zhongfu Industrial And Mining Accessories Co., Ltd.
Handan ZhongFu company is a professional manufacturer for underground mining supporting products with over ten year experience. We can manufacture Split sets ,friction bolt, Combi split sets, Expandable friction bolt,Swellex, Threaded bar bolt, Cable bolt, Combi cable bolt, Welded mesh, Domed plate, Nuts, other mining Equipment.
Preparation before rock bolt construction
(1) Check whether the type, specifications, quality, and performance of the anchor rod are consistent with the design.
(2) Prepare drilling equipment based on anchor rod type, specifications, and surrounding rock conditions.
rock bolt drilling
Stone tunnel anchor rods are drilled using pneumatic rock drills, while loess tunnels are drilled using ZM-12T coal-fired drills. Coal fired drilling construction can not only solve the problem of softening the surrounding rock when encountering water in soil tunnels, but also solve the difficulties of using conventional impact drills to discharge debris and form holes in soil tunnel construction, which can improve the drilling speed and safety in loess tunnels.
Anchor rod drilling is carried out using a simple platform set up by excavating steps, and holes are arranged according to the design spacing; The drilling direction should be as perpendicular as possible to the structural plane or the surface of the initial sprayed concrete: the anchor bolt hole should be 15 degrees larger than the rod diameter, and the depth error should not exceed ± 50mm; high-pressure air cleaning should be used after drilling.
Our address
West Side Of Jianshe Street, Southwest Industrial Zone, Linmingguan Town, Handan, Hebei, China
Phone Number
+8615830050566
zfgongkuang@aliyun.com
