Products
Expansion Shell Anchor Bolt
Expansion shell is an important part of expansion shell anchor bolt. expansion shell can provide prestressing to rock. It is very convenient and easy to install. It is suited temporary support and permanent support. It matches with domed plate, nut and domed washer. And they are suited for use in single or twin grout tube installation due to the minimal rotation the bar undergoes the setting process.
Expansion shells are used together with rock securing bolts, mounting bolts and combination bolts. It provides excellent grounding in hard and medium hard rock masses.
1.size:32mm, 35mm, 38mm, 42mm, 48mm
2.process:casting, forged, stamping, welding ,assembling
3.type: two leaves or three leaves
4.expansion shell include expansion shell anchor bolt, thread bar, anchor plate and nut.
Application
They are widely used in jet grouting, water well-drilling, tunnel, slope pre-support and control, mining, coast, building foundation, soil nailing, micropile, road reinforcement, water conservancy projects, geological faulty treatment, deep excavation,railway system, metro projects, etc.
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Underground Mining Roof Support Expansion Shell
As the professional manufacture, we would like to provide you Underground Mining Roof Support Expansion Shell. And we will offer you the best after-sale service and timely delivery. Underground Mining Roof Support Expansion Shell is designed to be used for roof and ribs support in mine working areas as an independent or auxiliary roof support system. Expansion shell bolts are easy to handle, while they are implemented fast. In the case of expanding anchors the anchor foot is braced against the borehole wall with wedge-shaped spreading elements.
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Underground Mining Expansion Shell Anchor
Underground Mining Expansion Shell Anchor, Anchor bolt, in tunneling and underground mining, steel rod inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity. Rock bolt reinforcement can be used in any excavation geometry, is simple and quick to apply, and is relatively inexpensive. The installation can befully mechanized.The length of the bolts and their spacing can be varied, depending on the reinforcement requirements.
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Underground Expansion Shell
The Underground expansion shell holds in any rock strata which is sufficiently competent to provide an adequate anchorage. They are designed to anchor in soft ground or hard rock. In good strata, the anchorage exceeds the ultimate strength of the steel bolt. All expansion shells require a competent strata in the anchor zone.
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Roof Supporting Expansion Shell Bolts
Roof Supporting Expansion Shell Bolts are used for fixing single-sided shuttering or similar structures in rock, concrete or comparable load-bearing ground. When installing expansion shells, please consult the separate installations instructions available on demand.
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Mining Expansion Shell Anchor Bolt
As the professional manufacture, we would like to provide you Mining Expansion Shell Anchor Bolt. Rock bolt, in tunneling and underground mining, steel rod inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity. Rock bolt reinforcement can be used in any excavation geometry, is simple and quick to apply, and is relatively inexpensive. The installation can be fully mechanized. The length of the bolts and their spacing can be varied, depending on the reinforcement requirements.
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Mining and Tunneling Expansion Shell Anchor
Mining and Tunneling Expansion Shell Anchor geometry showing the internal and external forces Eq. (1) indicates that the friction angle for the interface between the cone and the inner leaf surface must be less than the friction angle for the interface between the outer shell and the rock by an amount greater than the taper angle of the cone and inner leaf interface. In many cases, this condition is unlikely to be achieved because anchors are manufactured from cast components with an inherent roughness; the friction angle associated with this less than smooth surface is then often increased following zinc coating.
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