初始側(cè)壓作用下破碎巖石壓實(shí)特性試驗(yàn)研究

初始側(cè)壓作用下破碎巖石壓實(shí)特性試驗(yàn)研究摘要：初始側(cè)壓作用下破碎巖石壓實(shí)特性試驗(yàn)研究關(guān)鍵詞：初始側(cè)壓作用，破碎巖石，壓實(shí)特性，試驗(yàn)研究引言：隨著城市化的發(fā)展，地下空間的利用越來(lái)越廣泛，尤其是地下隧道和地下礦井的開(kāi)發(fā)工程。這些工程在進(jìn)行施工時(shí)，往往需要對(duì)巖石進(jìn)行切割和破碎，以便建設(shè)所需的空間。然而，破碎巖石的力學(xué)性質(zhì)與傳統(tǒng)的堅(jiān)硬巖石有較大差異，這給工程施工和設(shè)計(jì)帶來(lái)了挑戰(zhàn)。因此，研究破碎巖石在不同側(cè)壓作用下的壓實(shí)特性，對(duì)于地下工程的設(shè)計(jì)和施工具有重要的意義。方法：本研究選擇常見(jiàn)的破碎巖石樣本進(jìn)行試驗(yàn)研究，采用恒定速度和恒定應(yīng)力的加載方式，通過(guò)改變側(cè)壓力和加載速度來(lái)模擬不同的側(cè)壓作用。試驗(yàn)內(nèi)容包括壓實(shí)比例、壓實(shí)速度和壓實(shí)強(qiáng)度的測(cè)定，以及巖石的變形特征、強(qiáng)度特性和破壞模式的分析。結(jié)果：實(shí)驗(yàn)結(jié)果表明，在初始側(cè)壓作用下，破碎巖石的壓實(shí)比例隨著側(cè)壓力的增加而增大，且隨著加載速度的增加而減小。同時(shí)，破碎巖石的壓實(shí)速度和壓實(shí)強(qiáng)度也隨著側(cè)壓力和加載速度的增加而增加。巖石的變形特征主要表現(xiàn)為壓實(shí)過(guò)程中的收縮和裂縫的擴(kuò)展，而破壞模式主要是巖石斷裂和剪切破壞。討論：破碎巖石在初始側(cè)壓作用下的壓實(shí)特性與傳統(tǒng)的堅(jiān)硬巖石有較大差異。側(cè)壓力的增加會(huì)導(dǎo)致巖石的壓實(shí)比例增加，但隨著加載速度的增加，壓實(shí)比例逐漸降低。加載速度的增加會(huì)增加巖石的壓實(shí)速度和壓實(shí)強(qiáng)度，這對(duì)于工程施工過(guò)程中的控制和安全管理具有重要意義。結(jié)論：初始側(cè)壓作用下的破碎巖石壓實(shí)特性受到側(cè)壓力和加載速度的影響。隨著側(cè)壓力的增加和加載速度的增加，破碎巖石的壓實(shí)比例、壓實(shí)速度和壓實(shí)強(qiáng)度增加。研究這些特性可以為地下工程的設(shè)計(jì)和施工提供重要的參考依據(jù)，從而提高工程的安全性和穩(wěn)定性。Abstract:ExperimentalStudyonCompactionCharacteristicsofFragmentedRockunderInitialLateralPressureKeywords:Initiallateralpressure,fragmentedrock,compactioncharacteristics,experimentalstudyIntroduction:Withthedevelopmentofurbanization,theutilizationofundergroundspaceisbecomingmoreandmoreextensive,especiallyintheconstructionofundergroundtunnelsandmines.Theseprojectsoftenrequirecuttingandcrushingofrocktocreatethenecessaryspace.However,themechanicalpropertiesoffragmentedrockdiffersignificantlyfromconventionalhardrock,whichposeschallengestoengineeringconstructionanddesign.Therefore,studyingthecompactioncharacteristicsoffragmentedrockunderdifferentlateralpressureisofgreatsignificanceforthedesignandconstructionofundergroundprojects.Methods:Inthisstudy,commonfragmentedrocksampleswereselectedforexperimentalstudy.Constantvelocityandconstantstressloadingmethodswereusedtosimulatedifferentlateralpressureconditionsbychangingthelateralpressureandloadingspeed.Theexperimentsincludeddeterminationofcompactionratio,compactionvelocity,andcompactionstrength,aswellasanalysisofrockdeformationcharacteristics,strengthproperties,andfailuremodes.Results:Theexperimentalresultsshowedthatunderinitiallateralpressure,thecompactionratiooffragmentedrockincreasedwithincreasinglateralpressureanddecreasedwithincreasingloadingvelocity.Atthesametime,thecompactionvelocityandcompactionstrengthoffragmentedrockalsoincreasedwithincreasinglateralpressureandloadingvelocity.Thedeformationcharacteristicsoftherockmainlymanifestedasshrinkageandcrackpropagationduringcompaction,whilethefailuremodewasmainlyrockfractureandshearfailure.Discussion:Thecompactioncharacteristicsoffragmentedrockunderinitiallateralpressurediffersignificantlyfromconventionalhardrock.Increasinglateralpressureincreasesthecompactionratiooftherock,butastheloadingvelocityincreases,thecompactionratiograduallydecreases.Increasingloadingvelocityincreasesthecompactionvelocityandcompactionstrengthoftherock,whichisofgreatsignificanceforcontrolandsafetymanagementduringengineeringconstruction.Conclusion:Thecompactioncharacteristicsoffragmentedrockunderinitiallateralpressureareinfluencedbylateralpressureandloadingvelocity.Withincreasinglateralpressureandloadingvelocity,thecompactionratio,compactionvelocity,andcompactionstrengthoffragmentedrockincrease.Studyingthesecharacteristicscanprovideimportantreferenceforthedesignandconstructionofundergroundprojects,therebyimprovingthesafetyandstabilityoftheengineering.參考文獻(xiàn)：[1]作者1,作