梯度应力作用下隧洞岩爆破裂特性RA-AF-E分类研究

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中图分类号：TV67 文献标识码：A 文章编号：1001-9235（2025）11-0024-11

黄兵，刘夕奇，黄志怀，等.梯度应力作用下隧洞岩爆破裂特性RA-AF-E分类研究[J].人民珠江，2025，46（11）：24-34.

Research on RA-AF-E Classification ofRockburst Fracture Characteristics in Tunnels under GradientStresses

HUANG Bing'，LIU Xiqt ⋅2，3* ， HUANG Zhihuai²³， DING Tengteng²³，WANG Gang4 （1.ShenzhenRawWaterCo.Ltd.，Shenzhn518oo，China;2.PearlRiver WaterResourcesResearchIstitute，Guangzhou51061， China;3.KeyLaboratoryof WaterSecurityGuaranteeinGuangdong-HongKong-MarcoGreaterBayAreaofMinistryofWater Resources，Foshan528244，China; 4.KeyLaboratoryofRock MechanicsandGeohazardsofZhejiang Province，Shaoxing University Shaoxing 312000， China）

Abstract：Rockbustdisastescurrentlyconstituteacicalchallengeconstrainng thedevelopmentofepundergroundenging. Duringundergroundexcavation，thetangentialstressofthesuroundingockexhibitsagradientdistribution.Toinvestigatethe fractureharacteristicsofsuoundingockwithockburstsundervaryinggradientstresesalongthetunnel'stangentialdictioand understandvariousphenomenaduringrockburstoccurrence，thisstudyconductedfoursetsofrockbursttestsunderdiferentgradient stressloadingsusingaself-develoedtriaxialrockburst testingapparatus （Phoxiusphoxinussubsp.phoxinus），basedontestress pathexperincedbythesurroundingrock duringexcavationunloading.Byanalyzing theenergycharacteristicsofdiferentfracture typesandtheircorespodingacousticemissiondatapattens，thefiluremodesofintenalfractuepointsduringrockburstswere determined，revealingtheicrosopicmechanismsofitealackevolutionintheodelunderdiferentgadientstrsssduring rockbursts.Theresultsindicatethatstressgradientsignificantlyinfluencesthesuroundingrock'sfracturemodeduringrockbursts， leadingtodiverserockburstphenomena.Asthestressgradientincreases，themodel transitionsfromtensile-dominatedrockburstto shear-dominatedrockburst，withincreasinglypronouncedrockburstintensity.Therockburstfailureexhibitsacoexistingfracture paterncombiningtensile，shear，andtensile-shearcomposite modes.Under varying stressgradients，tensilefailureconsistently accounts foramajorproportioninockburstdamage，whileshearcracksandtensileshearmixed-modefracturegraduallincrease teir proportion with rising stress gradients.

Keywords： rockburst; stress gradient; gas-liquid composite loading; rupture characteristic; rockburst intensity

岩爆是高地应力岩体在开挖卸荷过程中，改变了原岩赋存环境而引起围岩切向应力集中导致围岩能量非均匀释放而产生的一种动力破坏现象[1]。（剩余11399字）