Theory Study And Numerical Simulation On The Influence Of Explosion Effectiveness Of Charge Structure

This paper analyzes various factors that impact broken rock blasting, establishes explosion load mechanics model in different charging structure. Through large general finite element software ANSYS/LS-DYNA3D to numerical simulation single-drillhole in different coupling medium. The theory analysis and numerical simulation results indicate that the nature and the types of explosive in rock under the same, not coupling medium and not the coupling coefficient is the main factors of influence explosion effectiveness. Water not coupled medium is stronger for energy storage medium than air not coupled medium, water decouple medicine explosion effect time is also longer than air decouple medicine, therefore, the water decouple medicine explosion energy utilization ratio is higher than air decouple medicine. Along with the increase of the decouple coefficient, hole wall pressure decreases gradually, air decouple medicine decouple coefficient is more obvious to change on rock mass effect of exploded in the peak stress field than water decouple remedies.On the basis of theory analysis with numerical simulation, according to the specific requirements of the project, we chose the water decouple medicine charging structure in vertical shaft excavation application, engineering practice shows that, with water decouple charge structures can overcome the problem of ponding in working face, to enhance the blasting efficiency, improve crushing effect, reduce vibration, reduce slungshot, realizes double control of quality and safety.This thesis research outfit medicine for engineering blasting practice rational structure optimization and the effective use of explosion energy and control provides certain theoretical basis.Figure 34 table 8 references 77...