Bolting with pumpable reactive resins – More than fixation of steel dowels in rock

Aldrian, Wolfgang; Wyink, Uwe; Herrmann, Christoph S.

doi:10.1002/geot.201800066

Cited by 4 publications

(1 citation statement)

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“…Anchor support is a kind of reinforcement support often used in roadway support, which is to change the mechanical state of the surrounding rock itself through the anchor inside the surrounding rock, and then use the anchor and the surrounding rock to work together to maintain the stability of the roadway. The behavior mechanism, application, and mode of bolts have evolved into standard practices for all types of underground excavation, significantly improving the overall rock mass properties [1]. In recent years, it has been proved that the use of energy absorbing anti-impact support can effectively control the deformation of the surrounding rock of the roadway and can effectively prevent the impact ground pressure of the roadway [2,3].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties of Automatic Anchoring Preloaded Energy Absorbing Anchor Rods

et al. 2023

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In order to enhance the anti-impact mechanical properties of the roadway support system, an automatic anchoring pre-tightening energy absorbing anchor composed of rod body, tray, constant resistance energy absorber, energy-absorbing casing bulging block, pre-tightening force warning washer, and nut and anchorage force warning stopper was designed and developed for the special requirements of rock burst roadway support. The anchor can automatically judge the anchoring force and pre-tightening force of the anchor, and also has the functions of energy absorption and early warning. The static load tensile test and impact test are used to study the mechanical properties of the energy absorbing anchor, such as the displacement distance, energy absorption, and impact time, and they are then compared with the mechanical properties of the conventional anchor. It is concluded that under static load, the yielding distance of the energy absorbing anchor is 1.67 times that of conventional anchor. The absorbed energy is 1.61 times that of the conventional anchor. Under the impact load, the displacement distance of the energy absorbing anchor is 2.02 times that of the conventional anchor. The absorbed energy is 1.85 times that of the conventional anchor, and the anti-impact time is 1.47 times that of the conventional anchor. The energy absorbing anchor increases the constant resistance deformation stage of the energy absorber during the deformation process, so that the anchor has better deformation ability, energy absorption, and anti-impact ability than the conventional anchor, and it can thus effectively guide and control the release and transformation of surrounding rock deformation energy.

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Section: Introductionmentioning

confidence: 99%