Deep Underground Mining Methods Pull Blasting Cutting Optimization

Cutting slot is the last step of preparing a recovery room before mine, mine usuallyends to the recovery room is limited to the border, dug out the free surface mining and orestope blasting prior to crushing compensation space. Cutting up the mountain formationdetermines the quality of the entire mine housing recovery effect and progress, whileblasting is still the primary means of excavation. The current study, the theoretical andexperimental study of the stope cut grooves cut blasting is not much. Therefore, the studyof the subject is of great significance to the development of deep mining technology.This paper mainly studied the theory deep underground mine blasting pullundercutting calculation methods and its associated parameters and field trials. Byhypothesis and rock blasting three laps to analyze the role of proposed technical principlesand duplex cylindrical undercutting the wedge cut; By analyzing deficiencies of theexisting fissures circle formula, studied the rock after being explosive detonation gasesand under stress wave together, cut blasting and crushing fractures circle radius circleformula; through the mechanism of stress wave reflection wave impedance obtaineddifference is smaller rocks and explosives, blasting high energy efficiency of conclusion;brief analysis of the empty hole in the blasting process undercut the role; blasthole depthand spacing of millisecond blasting time were studied. Based on the above principlesdrawn deep undercut with an empty hole Blasting holes formula layout parameters of thetheory, and draws Hole mode and blasting parameters and double barrel undercutting thewedge cut. Finally, this paper Maluping Mine Optimization undercutting researchbackground, undercutting of cylindrical wedge cut duplex mode and manner were studied,and achieved some results, for the slot dig deep to pull its way to optimize slot determinethe parameters, provides some experience, with practical significance for mine production.