| Bolt supporting, the main support method of geotechnical engineering such ascoal mine tunnel, tunnel structure and slope, has been widely used, but it still hasmany shortcomings in the understanding of the bolting mechanism. The widely usedresin anchored bolt is research object in the study. The mechanism and influencingfactors of anchor were investigated systematic by experimental tests, numericalsimulation, etc. The main results and conclusions were in the following:(1)According to Mindlin solution of the simplified analysis method and the idealelastic-plastic load transfer model based on local deformation in the theory ofanchoring technology, we know the distribution form of anchor axial force and theshear stress distribution on the interface between the anchor and anchoring agent, orbetween anchoring agent and rock mass.(2)The test model of resin anchored bolt anchoring segment was designed. Thedistribution form of anchor axial force and the shear stress distribution on theinterface between the anchor and anchoring agent had been measured in theexperiment, the possibility of failure form of resin anchored bolt was examined,revealing the transmission mechanism of resin bolt anchoring force. The influence oftemperature on the anchorage performance was obtained by the use ofelectro-hydraulic servo system MTS810test environment and supporting the MTSbox (U.S.).(3)The numerical model for performance analysis including rock anchoring,resin anchoring agent and bolt was established. The anchorage interface interactionwas investigated by setting the contact area between bolt and resin anchoring agent, orbetween resin anchoring agent and the surrounding rock mass. The factors includingdrawing load, anchor length, anchor diameter, thickness of the resin anchoring agentand geotechnical liquid influence on anchorage performance were discussed in thepaper, from which draw some useful conclusions and provide more useful referencefor practical application of bolting. |
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