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1、基于OED-GRA评价模型的采场岩体参数敏感性分析摘要针对岩体参数对采场稳定性的敏感性分析，本文提出一种正交-灰关联评价模型(OED-GRA)，选取Hoek-Brown准则岩体参数中地质强度指标GSI、岩石单轴抗压强度、岩石的软硬程度常数、岩体扰动系数D共4个因素，进行16个典型的试验方案正交数值模拟试验。取顶板沉降位移、顶板水平应力、矿柱水平位移、矿柱竖直应力4个指标进行基于指标满意度的敏感性分析。研究结果表明：GSI对采场稳定的敏感性最大，D的敏感度明显最小，，参数敏感性较GSI次之。通过分析Hoek-Brown准则与Mohr-Coulumb准则的关
2、系，基于灰关联理论获得岩体性质参数，GSI，，D与岩体力学参数(弹性模量)、黏聚力)、(内摩擦角)、(抗拉强度)之间的关联系数，其结果与岩体参数对采场稳定的敏感性分析结果一致。采用正交灰关联评价模型，避免了单因素分析敏感性的局限，同时可分析不同量纲的多因素关联度，结论更为客观、可靠，为多因素关联的敏感性分析提供一种新的思路。关键词岩体参数；敏感性；正交试验设计；灰关联理论；强度准则SensitivityAnalysisofRockMassParametersinStopeBasedonTheOED-GRAEvaluation ModelABSTRACT:
3、 In allusion to thesensitivityanalysisofrockmassparameterstostope stability,Theevaluation modelofOrthogonalExperimentalDesignandGray Relational Analysis(OED-GRA)isput forwardinthispaperby16numericalsimulationtestconsideringfourfactors,i.ethegeologicalstrengthindexGSI,therockuniax
4、ialcompressivestrength,theconstantreflecteddegreeofrocksoftandhard,thedegreeofdisturbancetorockmassDinHoek-Brownstrengthcriterion.Thesensibilityanalysisbasedonindicatorsofsatisfactionarecarriedoutwithfourindexesselected,i.etheroofdisplacement,theroofhorizontalstress,thepillarhori
5、zontaldisplacement,thepillarverticalstress.TheresultsshowthatthemaximalinfluentialdegreeofrockmassparameterstostopestabilizationistheGSIwhiletheminimumistheD,andtheGSImoresensitivecomparingtotheand.ThroughtheanalysisoftherelationsbetweenHoek-BrowncriterionandMohr-Coulumbcriterion
6、,the correlation coefficients betweenrockmasspropertyparameterssuchas,GSI,,Dandrockmass mechanicalparameterssuchus(Elasticmodulus),(Cohesion),(Angleofinternalfriction),(Uniaxialcompressivestrength)havebeenobtainedbasedontheGreyRelational Analysis,whichareconsistentwiththesensitiv
7、itytothestopestability.TheOED-GRAevaluation modelisadoptedtoavoidthelimitationsofthesinglefactoranalysissensitivityandmultiplefactorscorrelationofdifferentdimensionalcanbeanalyzedatthesametime, theconclusionismoreobjectiveandreliable,whichprovidesanewtrainofthoughtforthesensitivi
8、tyanalysisofmultiplefactorsassociated.KE
