Underground Mining Expansion Shell Anchor Expansion Shell Rock Bolts

Min.Order: 100

Product origin: Ningbo, Zhejiang, China

Infringement complaint:

Complaint

US$ 1.2

Description

Product Name: Expansion Shell Anchors Bolt

Material: carbon steel for Expansion Shell, cast iron for Rock anchor bolts

Finish: Oil Rusty

Process: Forging for Expansion Shell, casting for Rock anchor bolts

Application: Rock anchor used in sound rock or concrete allows one-sided forming of walls

Expansion shell bolts are a common style of area ground support. A point anchor bolt is a metal bar between 20 mm - 25 mm in diameter, and between 1 m - 4 m long There is an expansion shell at the end of the bolt which is inserted into the hole. As the bolt is tightened by the installation drill the expansion shell expands and the bolt tightens holding the rock together. Mechanical bolts are considered temporary support

Specification

Productio Process

Application

Expansion shell rock bolt anchors come in a wide variety of styles but the basic principle of operation is the same in all of these anchors. The components of a typical expansion shell anchor are a tapered cone with an internal thread and a pair of wedges held in place by a bail. The cone is screwed onto the threaded end of the bolt and the entire assembly is inserted into the hole that has been drilled to receive the rockbolt. The length of the hole should be at least 100 mm longer than the bolt otherwise the bail will be dislodged by being forced against the end of the hole. Once the assembly is in place, a sharp pull on the end of the bolt will seat the anchor. Tightening the bolt will force the cone further into the wedge thereby increasing the anchor force.

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