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1、flatMiningMininginflatorebodiesnearlyhorizontalextractionVariationsonroom-and-pillarandVerticalbenchinglongwallminingtechniqueshavealwaysbeenattractiveproposi-tionsformechanization,becausePillarofthenearhorizontalityofsuchsystems.Untilrecently,tracklesseq
2、uipmentwaslimitedtoamini-,2000PillarABmumworkingheadroomof2mrillsRockDormore.However,majordevel-Copcotlas©AopmentsinPolishcopperminesandingoldandplatinumminesBenchingofthickerpartsinSouthAfricahavespawnedanewgenerationofthin-seamandnarrowminingequipmentfr
3、omAtlasCopcothatcanworkinsub-stantiallylessspacethanprevious-lythoughtpossible.TheRocketClassicroomandpillarlayout.BoomerS1L,forinstance,hasatrammingheightofjust1.3m,yetcancoverafaceareaofupto29largethickness,alsotoinclineddepos-Oreproductioninflatroomand
4、pil-sqm.Likewise,theScooptramitswithlargerthickness.Miningthelarusesthesamedrill/blasttechniquesST600LPloaderequippedwithorebodycreateslargeopenings,whereasinnormaldrifting.Wheregeologicalvideocamerastoassistthedrivertracklessmachinescantravelontheconditi
5、onsarefavourable,large-capacityhasaheightofonly1.56m,butstillcarriesa6tpayload.Availabilityflatfloor.Orebodieswithlargeverticaldrillingrigsandloaderscanbeused.ofsuchmachinesisalreadyrevo-heightareminedinhorizontalslices,Highorebodiesareminedinslices,lutio
6、nizingthedesignapproachstartingatthetopandbenchingdownstartingatthetop,rockboltingtherooftominingflatorebodies.insteps.fromeachbench.StandardcrawlerrigsPostroomandpillarappliestoin-areusedfordrillingverticalholesandRoomandpillarclinedorebodies,ofdipanglef
7、rom20conventionalbenchblasting.Horizontalto55degrees,withlargeverticalheight,drillingandflatbenchingisamoreprac-Roomandpillarisdesignedforminingwhereminedoutspaceisbackfilled.ticalalternative,usingthesamedrillingofflat,beddeddepositsoflimitedthick-Thefill
8、keepstherockmassstable,equipment.ness.Examplesaresedimentarydepo-andservesastheworkplatformwhileTheblastedoreisloadedusingsits,likecoppershale,limestoneorminingthenextoreslice.dieselorcable-electricLHDmachines,sands
