巷道围岩锚杆支护作用加固拱理论及应用研究论文

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1、关键词：锚杆；加固拱；加固范围；应力分布；成拱荷载研究类型：应用基础研究Subject:TheoreticalandApplicationalStudyofAnchorReinforcedArchinRoadwaySurroundingRockSpecialty:GeotechniqueEngineeringName:WangBonan(Signature)Instructor:GuShuancheng(Signature)ABSTRACTWiththedevelopmentofboltingtechnologyandreinforcementt

2、heory,theboltinghasbeenwidelyusedinthecoalmines,tunnelsandotherundergroundworks.However,duetothemechanismactionofthesurroundingrockboltreinforcementiscomplex,theboltmechanismresearchisstillintheexploratorystageandseriouslaginpractice.Inthispaper，theexistingboltsupportingmecha

3、nismwereanalizedandthetheoryofreinforcementarchbeendepthstudied.Thenproposedthecircularreinforcedareaofthesinglebolt’smechanicalmodelbasingonoftheexistingresearchconclusions.Throughmechanicalanalysis,thereinforcementarch’smechanicalcharacteristicsofthedifferentformsincircular

4、,archedandrectangularroadwayhavebeenstudied.Finally,basedonofengineeringpractice,byanalyzingthesitemonitoringdataandproposingasupportoptimizationschemeoftheroadway.Throughthisstudy,obtainedthefollowingconclusions:1、Theexistingboltingtheoriesareanalyzed.Focusonthemechanismofre

5、inforcementarchtheoryandanalyzetheextrusionreinforcementeffectofboltsinsurroundingrock.2、Analyzedtheanchorageloadingmechanismandmechanicsofboltsonsurroundingrock.Basedontheexistingreinforcementmechanicalmodelofsinglebolt，proposedthecircularreinforcementareamechanicsmodel.Anal

6、yzedthethestressdistributionlawinreinforcementareaaccordancewiththetheoryofelasticityandderivedtherangeofthereinforcedarea’scalculationformulacombinedwithrockmechanicstheory.Obtainedtherelationshipbetweenthereinforcementarea,reinforcementloadandthesurroundingrock’sbyparametri

7、canalysis,andderivedcalculationformulaofthereinforcedarch’sthicknessbetweenboltlengthandinter-rowspacingbasedonthegeometryrelations.3、Studythearchingloadofboltsinformingthereinforcementarchintheroadwayandobtainformulathearchingloadbetweenboltlength,surroundingrockparametersan

8、dgroundstress,thengettherelationshipcurvesofthearchingloadandboltlen