Mining Anchors Are Widely Used

Mining anchors are widely used

The original anchor retaining wall construction is completed and in use for a period of time, because in the planning of the unfavorable elements are not all, the quality of construction in the construction process is not controlled or not in accordance with the construction process construction, in the application process because of man-made or natural elements and so on, resulting in the failure of some of the original anchors, and failure of the anchors can not be approved to rehabilitate its resistance and therefore can not be used normally; so that because of the failure of anchors can not continue to supply resistance to bind the slope deformation, and other anchors can not increase the bearing capacity will result in the anchors Continuously supply resistance to bind the deformation of the slope, and other anchors can not increase the bearing capacity will lead to anchor

The anti-slip force of the anchor is less than the downward force of the slope.

At present, the design method of mining anchor support still stays in the stage of empirical design, and the newly developed on-site monitoring method can help to make further scientific judgment, and it is also developing to the scientific theoretical calculation. Theoretical calculation method has some problems, and it is still only used as a reference basis for design, but it has made great progress in the past ten years. The following engineering analogies to empirical means, to test as a means of on-site monitoring method and to calculate as a means of “theoretical analysis method” for a brief introduction.

The engineering analogy method is a widely used method, which directly proposes the design parameters of the anchor spray support based on the experience of similar projects that have been constructed. Usually, the engineering analogy method is based on the anchor spray support type and parameter table in the anchor spray support specification.

Site monitoring design method is a kind of information design construction method according to the principle of Neo method, which is generally divided into two stages: pre-design stage and final design stage. The final design is based on the site monitoring data, after analyzing or calculating the proposed design.

Field monitoring measurements usually include section convergence measurement, surrounding rock deformation measurement, anchor stress measurement and other items, for the section project, but also for the spray layer surface contact stress and spray layer stress measurement.

Theoretical analysis method is divided into two categories: one is the analytical method, the second is the numerical calculation method. The following mining anchor manufacturers to anchor suspension theory calculation as an example, to illustrate the essence of the theoretical analysis method.

When the strength calculation of anchor rods supporting individual dangerous rocks, the local arrangement of anchor rods, need to ensure the connection between the unstable rock block and the stable rock block. Usually, the top arch anchors are calculated by “suspension theory”, and the anchors on the side arch and side wall should ensure that the dangerous rocks don't slide down, and the effect of prestressing of the anchors and the shear strength of the sliding surface and are generally taken into account in the calculation. In general, only the effect of gravity is considered, and the following formula is usually used to determine the spacing of anchors and the depth of anchors into the stabilized rock.