7.Study on the stability of roadway surroundingrock under anchorage bearing structure

Abstract:

In order to study the influence of the anchor bearing layer on the stability of the surrounding rock in the anchor support，thestudy was carried out by theoretical calculations and numerical simulation of FLAC3D，and the mechanical model under the action ofthe anchor bearing layer was established，and the equations for the stress of the surrounding rock in the roadway within the range of theaction of the anchor bearing layer and its support force were deduced． The numerical simulation results show that the anchored bearingstructure role of the roadway has a better inhibition effect on the development of the surrounding rock plastic zone and surrounding rockdeformation; the area of the plastic zone and the degree of rupture after anchoring is also much smaller than that of the channel beforeanchoring; the radius of the plastic zone also has a tendency to decrease with the increase of the anchorage bearing capacity，and thisconclusion provides a certain reference for the work of maintaining the stability of the perimeter rock of the roadway．

Keywords: anchor bearing layer; plastic zone of surrounding rock; roadway stability