Question

How the slope reinforcement is done by Rick bolting and Rock anchoring?

Answer 1

Rock Anchors- This is the most common type of internal reinforcement which are threaded steel bars or cables.
They are inserted into the rock by drilled holes and bonded to the rock mass using cement grout or epoxy resins.
Because the bond strength between the cement grout or resin and the rock is less than the maximum yielding stress of the steel, Rock anchors can be used to secure a single loosened block or to stabilize an entire rock slope that is affected by a prevalent rock structure. Anchors can be combined with other stabilization techniques if they cannot mitigate the hazard alone. They are putup into the rocks reinforcement and combine their strength to give a highly stable and secure reinforcement.

Rock reinforcement design depend upon surface mapping and logging discontinuities along with borehole data as
discontinuities strongly control rock slope stability. It is also important to assess the groundwater present in the rock discontinuities to measure slope stability.To determine the slope's safety, the following conditions should be evaluated: the height and thickness of the rock mass that requires stabilization, and the shear strength of the failure plane. The reinforcement are analysed either as a single stabilizing element or a series of reinforcing element to get desired factor of safety. The length of the bolt or cable is dependent on the bond strength and spacing.

Rock anchors are usually installed in a grid pattern, in which anchor is the same length and set at a fix distance from the surrounding bolts.Following a set pattern can improve the structural stability of an entire rock face, especially for weathered or highly fractured rock as a design on a bolting pattern around them that makes it more difficult for the surrounding blocks to move.