Examples of 'rock bolt' in a sentence
Meaning of "rock bolt"
A rock bolt is a long anchor bolt, for stabilizing rock excavations, which may be used in tunnels or rock cuts
How to use "rock bolt" in a sentence
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rock bolt
Rock bolt holding chain link fabric.
This provides a rock bolt giving a small protrusion.
Rock bolt anchorage test results.
Other steps can also be there depending on type of rock bolt.
The quality of rock bolt installation is difficult to verify afterwards.
Another objective of the present invention is to reduce bending stress in the rock bolt.
The rock bolt according to the invention could be of different embodiments.
The corresponding advantages are achieved through the invention through a rock bolt having corresponding features.
It is preferred that the rock bolt comprises two diametrically opposed axially extending flutes.
The Manganese rock bolt.
The invention provides a rock bolt with multiple straight stem portions each followed by a short anchor.
Figure 2 shows schematically an expansion process for expanding a rock bolt.
Fig . 4 is an axial section of an expandable rock bolt according to the invention.
Fig 3 shows the same part in position for insertion of a rock bolt.
The invention also concerns a rock bolt according to the preamble of claim 6.
See also
Fig 7 shows the drill guide swung away for insertion of a rock bolt.
It is known to use a self-drilling rock bolt such that the second step is avoided.
In some embodiments, the gripper arms may comprise gripper jaws for engaging the rock bolt.
Sinorock duplex coating rock bolt adopts two corrosion-prevention measurements on the bolt surface.
Brief description of the drawings Figure 1 shows a rock bolt in accordance with the invention.
The rock bolt defined in claim 16, wherein the threaded profile is continuous.
Arm 9 is brought to grip the rock bolt.
With reference now to figure 1, a rock bolt 7 in accordance with the present invention is shown.
The connection unit also comprises a supporting sleeve 9, which is fastened to the rock bolt 7.
Finger 7 is activated to push a rock bolt into bolt setting machine 5.
Each rock bolt 5 is positioned in a blind hole 6 which is drilled radially into the rock 2.
Position 22 concerns axially pulling of the rock bolt in a direction outwardly.
Fig . 5d illustrates a rock bolt according to the invention having anchors with an eye-shaped aperture.
Many papers have been written on methods of rock bolt design . [ 3 ].
The diameter of the rock bolt stem may be between 10 mm and 40 mm or more.
The leading edges 17 of the thread sections 13 define cutting edges of the rock bolt 3.
The rock bolt 15 has a tendon 16 formed from a cable fabricated from steel wires.
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