Ground Tunnelling Expansion Shell Rock Bolt

Ground Tunnelling Expansion Shell Rock Bolt is a kind of rod that is anchored in the rock mass.
The use of anchor bolt to support the roadway is to drill holes in the surrounding rock after the roadway is driven, and then install the anchor bolt in the eye to strengthen the surrounding rock of the roadway manually.
The anchor rod has many advantages: saving pit wood and steel, reducing support costs, small excavation section, small deformation of the roadway, low maintenance costs, safety, portability, can reduce physical labor, reduce ventilation resistance, is conducive to the construction of a lane and speed up the excavation speed, wide range of use,strong adaptability, reduce the amount of transportation, is conducive to the transportation and upgrading of the mine. However, the bolt can not prevent the weathering of surrounding rock, can not completely prevent the fracture rock spalling between the bolt and the bolt, therefore, the bolt combined with other supporting measures, such as metal mesh, will achieve better supporting effect.

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Product Description

item	Expansion Shell
Finish	Sand Blast, Zinc plated
Material	Forged Steel, #45 steel, Alloy Steel40Cr
Place of Origin	China
Standard	DIN
Material	Forged Steel, Metal/Plastic
Finish	Bright(Uncoated)
Color	Black, Grey, Blue, White,Black.etc
Diameter	36mm-57mm
Capacity	14-20 Tons
Size	Customized

Production Process

Machining Workshop

We have full set line of machining facilities, various CNC equipment and Machining Center can meet customers’ requirements. After machining, the casting parts will be completed. Then, they will be inspected and packed for delivery and shipment.

Quality Control

Checking the raw material after they reach our factory------- Incoming quality control
Checking the details before the production line operated
Have full inspection and routing inspection during mass production---In process quality control
Checking the goods after they are finished---- Final quality control
Checking the goods after they are finished-----Outgoing quality control

Packing and Delivery

Packaging of Ground Tunnelling Expansion Shell Rock Boltl can be customized based on customer requirements to meet the different needs, such as plastic bag, carton box, wooden case, crate, etc.