Ruiyu Support Takes You To Understand The Hollow Anchor Rods In The Mines

Ruiyu support takes you to understand the hollow anchor rods in the mines

Since the introduction of hollow anchors 40 years ago, their use in mines has gradually increased for support and stabilization of underground mines with remarkable results. Hollow anchors have significantly reduced the number of roof falls and are now the primary support option required by most mine safety and health authorities. Another important benefit is that hollow anchors provide unobstructed access to openings, promoting greater freedom of movement and improved ventilation.

However, even in areas where hollow anchors have been used, roof collapses have still occurred. While every effort is made to design and evaluate safe and economical roof control programs using scientific data and case study results, more information is needed to better understand the response of anchors to ground movement. Lack of this information can lead to under- or over-design of anchor types, lengths, diameters, and spacing. Underdesign may lead to roof collapse, while overdesign may place an unnecessary financial burden on mine operators. Therefore, there is a need to describe anchor behavior through scientific knowledge to provide guidelines for designing an effective roof control program for safe, economic and overall mining activities. Numerical modeling is one of the most important methods for researchers to study the support requirements of the strata around underground openings, but numerical simulations alone are not sufficient and additional laboratory and field experiments are required to provide a more complete understanding of support interactions.

In this case, resin-cured full-column hollow anchors have been applied as roof support devices to support unstable openings in underground mines. As this type of anchor continues to be utilized, improved design criteria and installation techniques will lead to more efficient results for support work.

To gain insight into the mechanical transfer between anchors and rock, the Bureau of Mines initiated a load-transfer mechanics research program for hollow anchors designed to support the goal of improving the nation's underground safety for miners. The study was first conducted in the laboratory to examine the behavior of anchor rods under different loading conditions to inform subsequent numerical model development. The next task was to establish practical application correlations for anchor rods based on laboratory and field test results.