To study the shear performance of rock joints reinforced by NPR (negative Poisson's ratio)
bolts, direct shear experiments with different shear rates were carried out on both quasi-NPR …

In underground mining practice, the rock bolt support system is the major support pattern to
control the deformation and stability of openings. A rock bolt is generally subjected to …

A new method was developed to apply pull-and-shear loads to the bolt specimen in order to
evaluate the anchorage performance of the rebar bolt and the D-Bolt. In the tests, five …

The performance of two types of rock bolts, fully encapsulated rebar and D-Bolt, under
combined pull and shear loading were studied in the laboratory. A new test approach was …

Rockbolts are widely used in the tunnels and underground mining industry for support and
reinforcement of the rock mass around the perimeter of the excavation. Better understanding …

In coal mining roadway support design, the working resistance of the rock bolt is the key
factor affecting its maximum support load. Effective improvement of the working resistance is …

To realize the numerical analysis of rock bolt bearing-yield-fracture under tension-shear
coupling and to provide an effective means for supporting the design of roadways or tunnels …

Rock mass stabilization by bolting is an effective and economical means, which has been
widely used in mining and tunnelling. Bolted joints could be subjected to two categories of …

The mechanical performance of fully grouted rock bolts is essential in the stability of
underground excavations in jointed rock masses. This research implements a new cohesive …

Failure of rockbolts as a result of shear or bending loads can often be found in underground
excavations. The response of rock anchorage systems has been studied in shear, both by …