任务精读：爆破一般知识（双语）课件讲解

隧道施工技术爆破一般知识TunnelConstructionTechnologyGeneralKnowledgeofBlasting爆破一般知识目录TableofContentsGeneralKnowledgeofBlasting爆破破岩作用及有关概念1RockBreakingActionandRelatedConceptofBlasting隧道内常用的爆破方法2CommonBlastingMethodUsedinTunnels周边眼的控制爆破3ControlledBlastingofPeripheryHole课程小结4Summary爆破破岩作用及有关概念RockBreakingActionandRelatedConceptofBlasting01爆破一般知识爆破破岩作用及有关概念钻爆开挖作业是隧道钻爆法施工中首要的一项GeneralKnowledgeofBlastingRockBreakingActionandRelatedConceptofBlastingDrillingandblastingexcavationisthefirstandforemostoperationindrillingandblastingconstructionoftunnel凿出炮眼Drillingblasthole装上炸药Chargingexplosive进行爆破Blasting其造价为总造价的20%~40%Thecostis20%~40%ofthetotalcost1.无限介质中的爆破作用的区域划分1.AreaDivisionofBlastingActioninInfiniteMedium指半径为R1范围的区域。介质距离药包最近，受到的压力最大，破坏最大。土壤或软岩时压缩形成一个环形体孔腔；硬岩时产生粉碎性破坏。①Compressedandcrushedarea①压缩粉碎区

ItreferstotheareawitharadiusofR1.Themediumisclosesttotheblastingcartridge,sufferingthegreatestpressureanddamage.Anannularcavityisformedwhensoilorsoftrockiscompressed;crusheddamageoccursincaseofhardrock.

R1与R2之间的范围叫抛掷区。介质的结构被破坏成碎块。有多余能量使碎块获得运动速度，有临空面时，在临空面方向上被抛掷出去，产生抛掷运动。②抛掷区②Throwingarea

TherangebetweenR1andR2iscalledthethrowingarea.Thestructureofthemediumisbrokenintofragments.Excessenergymakesthefragmentsobtainthemotionspeed.Incaseofafreeface,theyarethrownoutinthedirectionofthefreeface,resultinginthrowingmotion.爆破一般知识爆破破岩作用及有关概念GeneralKnowledgeofBlastingRockBreakingActionandRelatedConceptofBlasting震动区3R抛掷区破坏区R1压缩粉碎区2R4RR1压缩粉碎区CompressedandcrushedareaDamageareaVibrationareaThrowingareaCompressedandcrushedarea1.无限介质中的爆破作用的区域划分1.AreaDivisionofBlastingActioninInfiniteMedium

该区又叫松动区，是指R2与R3之间的区域。爆炸能量在此区域内只能使介质破裂松动，已没有能力使碎块产生抛掷运动。③破坏区③Damagearea

Thisarea,alsocalledtheloosearea,referstotheareabetweenR2andR3.Theexplosionenergyinthisareacanonlybreakandloosenthemedium,insteadofcausingthethrowingmotionoffragments.

R3与R4之间的范围叫爆破震动区。在此范围内，爆破能量只能使介质发生弹性变形，不能产生破坏作用。④震动区④Vibrationarea

TherangebetweenR3andR4iscalledtheblastingvibrationarea.Withintherange,theblastingenergycanonlycauseelasticdeformationofthemediuminsteadofdestructiveaction.爆破一般知识爆破破岩作用及有关概念GeneralKnowledgeofBlastingRockBreakingActionandRelatedConceptofBlasting震动区3R抛掷区破坏区R1压缩粉碎区2R4RR1压缩粉碎区CompressedandcrushedareaDamageareaVibrationareaThrowingareaCompressedandcrushedarea①临空面①Freeface

临空面又称为自由面，是指暴露在大气中的开挖面。在假定的无限介质中爆破，抛掷和松动是无法实现的，而在有临空面存在的情况下，足够的炸药爆破能量就会在靠近临空面一侧实现爆破抛掷。

临空面数目的多少对爆破效果有很大影响。爆破一般知识爆破破岩作用及有关概念GeneralKnowledgeofBlastingRockBreakingActionandRelatedConceptofBlasting２.爆破的基本概念2.BasicConceptofBlasting

Freeface

isalsoknownasthefreesurface,whichreferstotheexcavationsurfaceexposedtotheatmosphere.Blasting,throwingandlooseninginanassumedinfinitemediumisimpossible,whileinthepresenceofafreeface,sufficientexplosiveblastingenergywillrealizeblastingandthrowingonthesideclosetothefreeface.

Thenumberoffreefaceshasagreatimpactontheblastingeffect.②爆破漏斗②Blastingcrater

在有临空面的情况下，由炸药爆破形成的一个圆锥形的爆破凹坑称为爆破漏斗。爆破一般知识爆破破岩作用及有关概念GeneralKnowledgeofBlastingRockBreakingActionandRelatedConceptofBlasting

Inthecaseofafreeface,aconicalblastingpitformedbyexplosiveblastingiscalledablastingcrater.W－最小抵抗线

Minimumresistancelineθ－爆破漏斗张开角

Openangleofblastingcrater

r

－爆破漏斗半径

Radiusofblastingcrater

L

－爆堆宽度

Widthofblastingheap

爆破漏斗的几何要素Geometric

elements

of

blasting

craterR

－爆破漏斗作用半径

Actionradiusofblastingcrater

H

－爆堆高度

Heightofblastingheap

h

－可见爆破漏斗高度

Visibleheightofblastingcrater3.钻孔机具3.DrillingMachinesandTools它们的工作原理都是利用镶嵌在钻头体前端的凿刃反复冲击并转动破碎岩石而成孔，有的可通过调节冲击功的大小和转动速度以适应不同硬度的石质，以达到最佳的成孔效果。爆破一般知识爆破破岩作用及有关概念GeneralKnowledgeofBlastingRockBreakingActionandRelatedConceptofBlasting①凿岩机①Rockdril②凿岩台车

②Drilljumbo钻孔机具DrillingMachinesandTools

Theirworkingprincipleistousethechiseledgeembeddedinthefrontendofthedrillbitbodyforrepeatedimpactandrotationtobreakrocksandformholes.Somecanadapttostoneswithdifferenthardnessbyadjustingthemagnitudeandrotationspeedofimpactenergy,soastoachievethebesthole-formingeffect.隧道内常用的爆破方法CommonBlastingMethodsUsedinTunnels021.炮眼的种类和作用1.TypeandFunctionofBlastholes隧道内常用的爆破方法是传统的炮眼爆破爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

掏槽眼Cuthole

辅助眼Auxiliaryhole

周边眼Peripheryhole

炮眼布置图BlastholeLayoutThecommonblastingmethodusedintunnelsistraditionalblastholeblasting.20cm5cm10cm①③④②⑤②①5cm10cm20cm①连续装药结构：利用连续装药装置实现连续装药。包括设置在工位内的装药机、压药机及相关动力传动控制装置。自动装药机可自动完成乳化炸药装药到封口的工艺动作。爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

掏槽眼CutholeThecutholeisusedtoblastagroovecavityontheexcavationfacetocreateanewfreefaceforthesubsequentblastholeblasting.Cutholeandbottomholeare10~25cmdeeperthanotherblastholes,andthechargingamountisincreasedby15%~20%.Continuouschargingstructure:Continuouschargingdeviceisusedtorealizecontinuouscharging.Includingthechargingmachine,pressingmachineandrelatedpowertransmissioncontroldevicesetinthestation.Theautomaticchargingmachinecanautomaticallycompletetheprocessactionofchargingtheemulsionexplosivetotheseal.作用：先在开挖面上炸出一个槽腔，为后续炮眼的爆破创造新的临空面。掏槽眼与底眼比其它炮眼深10~25cm，装药量增加15%~20%。20cm5cm10cm①③④②⑤②①5cm10cm20cm②爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

辅助眼Auxiliaryhole作用：扩大掏槽眼炸出的槽腔，为周边眼爆破创造临空面。装药量介于掏槽眼和周边眼装药量之间，多采用连续装药结构。Theauxiliaryholeisusedto:expandthegroovecavityblastedbythecuthole,andcreateafreefaceforperipheryholeblasting.Theexplosivechargeisbetweenthatofcutholeandperipheryhole,andcontinuouschargingstructureismostlyadopted.20cm5cm10cm①③④②⑤②①5cm10cm20cm③④④⑤爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

周边眼Peripheryhole作用：炸出较平整的隧道断面轮廓。周边眼装药量最小，多采用不耦合装药。底眼比其它炮眼深15~25cm。Peripheryholeisusedto:blastoutarelativelyflattunnelsectionprofile.Theexplosivechargeofperipheralholeistheminimum,anddecouplingchargingaremostlyadopted.Thebottomholeis15~25cmdeeperthanotherblastholes.爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels根据掏槽眼与工作面的相对关系以及掏槽眼在被爆岩体中的排列形式，可分为斜眼掏槽、直眼掏槽缓和混合掏槽。

Accordingtotherelativerelationshipofcutholeswithworkingfaceandtheirarrangementintheblastedrockmass,thecutmodecanbedividedintoobliquecut,parallelcutandcombinationalcut.掏槽方式CutMode爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

斜眼掏槽ObliqueCut特点：掏槽眼与开挖断面斜交。掏槽方式CutMode包括：锥形掏槽、各种楔形掏槽、单向掏槽等。隧道爆破中常用的是垂直楔形掏槽和锥形掏槽。Features:Thecutholeobliquelyintersectswiththeexcavatedsection.Including:pyramidcuts,variouswedgecutsandone-waycuts,etc.Verticalwedgecutsandpyramidcutsarecommonlyusedintunnelblasting.爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

斜眼掏槽ObliqueCut(1)斜眼掏槽布置形式掏槽方式CutMode由数个朝同一方向倾斜的炮眼组成。适用于隧道断面内有软弱夹层、层理、节理和裂隙时。One-waycut

单向掏槽(1)Layoutofobliquecut

Itconsistsofseveralblastholesinclinedinthesamedirection.Itissuitablefortunnelsectionswithweakintercalatedlayers,beddings,jointsandfissures.(a)顶部掏槽(a)Topcut(b)底部掏槽(b)Bottomcut爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

斜眼掏槽ObliqueCut掏槽方式CutModeWedgecut楔形掏槽由两排相对称的倾斜炮眼组成，爆破后形成一个楔形槽。楔形掏槽的分类及适用条件分为：垂直楔形掏槽和水平楔形掏槽(a)verticalwedgecut(a)垂直楔形掏槽

Itconsistsoftworowsofsymmetricalinclinedblastholes,whichformawedgegrooveafterblasting.ClassificationandapplicableconditionsofwedgecutItisdividedintoverticalwedgecutandhorizontalwedgecut.(b)水平楔形掏槽(b)horizontalwedgecut垂直楔形掏槽适用于中硬以上的均质岩石水平楔形掏槽适用于岩层为水平层理时。(使用较少)VerticalwedgecutissuitableforhomogeneousrockabovemediumhardnessHorizontalwedgecutissuitableforhorizontalbedding.(lessused)爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

斜眼掏槽ObliqueCut掏槽方式CutModePyramidcut锥形掏槽炮眼呈角锥形布置，各掏槽眼以相等或近似相等的角度向工作面中心轴线倾斜，眼底趋于集中，但互相并不贯通，爆破后形成锥形槽。根据掏槽炮眼数目的不同分为三角锥、四角锥、五角锥等。适用于岩石较坚硬的均质岩层。(a)三角锥(b)四角锥(c)五角锥

Theblastholesarearrangedinpyramid,eachcutholeinclinestowardsthecentralaxisoftheworkingfaceatequalorapproximatelyequalangle.theholebottomtendstobeconcentrated,butthey'renotconnected,andafterblasting,apyramidgrooveisformed.

Accordingtothenumberofcutblastholes,itisdividedintotriangularpyramid,quadrangularpyramidandpentagonalpyramid,etc.Itissuitableforhardhomogeneousrockstrata.(a)triangularpyramid(b)quadrangularpyramid©pentagonalpyramid爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

斜眼掏槽的优缺点Advantagesanddisadvantagesofobliquecut掏槽方式CutMode操作简单，精度要求较直眼掏槽低，能按岩层的实际情况选择掏槽方式和掏槽角度，易把岩石抛出，掏槽眼的数量少且炸药耗量低等。优点Advantages缺点Disadvantages眼深易受开挖断面尺寸的限制，不易提高循环进尺，也不便于多台凿岩机同时作业。

Theoperationissimpleandtheaccuracyrequirementislowerthanthatofparallelcut,thecutmodeandcutanglecanbeselectedaccordingtotheactualsituationoftherockstratum,itiseasytothrowoutrocks,thenumberofcutholesissmallandtheconsumptionofexplosiveislow,etc.

Theholedepthiseasilylimitedbythesizeoftheexcavatedsection,soitisdifficulttoimprovethecyclefootage,andinconvenientformultiplerockdrillstoworkatthesametime.爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

直眼掏槽ParallelCut掏槽方式CutMode

Theparallelcutconsistsofseveralblastholesperpendiculartotheexcavationface.Thecutdepthisnotlimitedbythehardnessofsurroundingrockandthesizeofexcavatedsection.Itcanrealizesimultaneousoperationofmultipledrillingrigs,deepholeblastinganddrillingmechanization,thusprovidingfavorableconditionsforincreasingthetunnelingspeed.

直眼掏槽由若干个垂直于开挖面的炮眼所组成，掏槽深度不受围岩软硬和开挖断面大小的限制，可以实现多台钻机同时作业、深眼爆破和钻眼机械化，从而为提高掘进速度提供了有利条件。爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

直眼掏槽ParallelCut掏槽方式CutModeColumnarcut柱状掏槽充分利用大直径空眼作为临空孔和岩石破碎后的膨胀空间，使爆破后能形成柱状槽口的掏槽爆破。(1)直眼掏槽的布置形式(1)Layoutofparallelcut

Thecutblastingwithcolumnarnotchformedafterblastingbymakingfulluseofthelarge-diameterhollowholeasthefreeholeandtheexpansionspaceafterrockcrushing.(a)菱形布置(b)楔形布置(c)三角形布置(a)Lozengearrangement(b)Wedgearrangement(c)Triangulararrangement爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

直眼掏槽ParallelCut掏槽方式CutModeSpiralcut螺旋形掏槽螺旋形掏槽是由柱状掏槽发展而来，其特点是中心眼为空眼，邻近空眼的各装药眼至空眼之间的距离逐渐加大，其连线呈螺旋形，并且由近及远依次起爆。

Thespiralcutisdevelopedfromthecolumnarcut,whichischaracterizedbyanhollowcentralhole.Thedistancebetweeneachchargingholeadjacenttothehollowholegraduallyincreases.Theconnectionisspiral,anddetonationoccursinsequencefromneartofar.a=(1.0～1.5)Db=(1.2～2.5)Dc=(3.0～4.0)Dd=(4.0～5.0)DD为钻孔直径，一般不小于100mmDisdrillingdiameter,generallynotlessthan100mm爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

直眼掏槽的特点Characteristicsofparallelcut适用于中硬岩层或坚硬岩层适宜采用中深孔爆破凿眼效率高炮眼利用率高抛掷距离短耗药量大要求严格ApplicabletomediumhardrockstratumorhardrockstratumSuitableformedium-deepholeblastingHighdrillingefficiencyBlastholeutilizationrateShortthrowingdistanceHighexplosiveconsumptionStrictrequirements爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels2.炮眼的布置2.BlastholeLayout直线型布置Straight-linearrangement

形式简单且易掌握，同排炮眼的最小抵抗线一致，间距一致，前排眼为后排眼创造临空面，爆破效果较好。

Thearrangementissimpleandeasytomaster.Theminimumresistancelineofblastholesinthesamerowisconsistent,withthesamespacing.Thefrontrowofholescreatesafreefacefortherearrowofholes,andtheblastingeffectisgood.爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels多边形布置Polygonalarrangement

围绕着掏槽部位，由里向外，将炮眼逐层布置成正方形、长方形、多边形等。

Thearrangementissimpleandeasytomaster.Theminimumresistancelineofblastholesinthesamerowisconsistent,withthesamespacing.Thefrontrowofholescreatesafreefacefortherearrowofholes,andtheblastingeffectisgood.弧形布置Arcarrangement

顺着拱部轮廓线，逐圈布置炮眼。此外，还可将开挖面上部布置成弧形，下部布置成直线形，以构成混合型布置。爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

Thismethodarrangestheblastholesturnbyturnalongthearchcontourline.Inaddition,theupperpartoftheexcavationfacecanbearrangedinanarcshapeandthelowerpartcanbearrangedinastraightlinetoformamixed-typearrangement.圆形布置

当开挖面为圆形时，炮孔围绕断面中心逐层布置成圆形。这种布孔方式，多用在圆形隧道、泄水洞以及圆形竖井的开挖中。爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnelsCirculararrangement

Whentheexcavationfaceiscircular,theblastholesarearrangedinacircularshapelayerbylayeraroundthecenterofthesection.Suchholearrangementmethodismostlyusedintheexcavationofcirculartunnels,drainagecavernsandcircularshafts.爆破一般知识隧道内常用的爆破方法GeneralKnowledgeofBlastingCommonBlastingMethodsUsedinTunnels

光面爆破与预裂爆破的关系Characteristicsofparallelcut孔距必须与最小抵抗线相匹配采取不耦合装药或装填低威力炸药同组光爆孔(预裂孔)同时起爆起爆顺序不同装药量不同HolespacingmustmatchtheminimumresistancelineUncoupledchargeorlow-strengthexplosiveisadoptedSimultaneousdetonationofthesamegroupofsmoothblastingholes(pre-splittingholes)DifferentblastingsequenceDifferentexplosivecharge相同点Similarities区别Difference周边眼的控制爆破ControlledBlastingofPeripheryHole03光面爆破是指沿开挖边界布置密集炮孔，采取不耦合装药（炮孔直径大于药卷直径）或装填低威力炸药，在主爆区之后起爆，以形成平整的轮廓面的爆破作业。

不耦合装药：炸药直径小于炮孔直径，炸药与炮孔壁之间留有间隙的装药方式。爆破一般知识周边眼的控制爆破GeneralKnowledgeofBlastingControlledBlastingofPeripheryHole３.周边眼的控制爆破3.ControlledBlastingofPeripheryHole

Smoothblastingreferstothearrangementofdenseblastholesalongtheexca