body wavesboltbond indexbond lawboosterbooster fanbootlegbore hole jackboreholebottombottom chargebottom cutboudinagebouger anomalybouger correctionboulderboundaryboundary element methodboundary methodsboundary ventilation methodbowl classifierbox cutbox foldbrake horsepowerbrake inclinebrattice sheetingbrazilian testbreak even cut off gradebreak even stripping ratiobreak indexbreakage functionbreaker propbreakthroughbreastbreast stoping methodbreasting jacksbreather tube methodbridge conveyorbridging forcebriquetbrisancebritish gumbrittle fracturebroadside shootingbrowning movementbubblebucketbucket fill factorbucket wheel excavatorbuckman table