Abstract: A large numer of experimental data is collected to conduct multiple experiments,the experimental results show that, the return fine rate can be reduced by taking the measures of adding diesel into emulsification granular anfo explosives. The good continuity effects of delivering explosives is obtained with the diameter of boreholes of upward middle-deep blasting hole is 91 mm,the back tube speed of explosive loading truck is about 17 cm/s,the static pressure and dynamic pressure of the tank are 0.65~0.7 MPa, 0.45 MPa respectively. The experimental results provide the basic paramters for mechanized loading in mesishan iron mine,besides that, these paremeters can also provide a certain reference to the similar dometic mines.

Key words: Non-pillar sublevel caving, Upward middle-deep blasting hole, Mechanized loading