In Nanfen Open-pit Iron Ore Mine,the reasons and positions of occurring of lump and residual root of bench after blasting are analyzed.

Feasibility study of side slope extension in Nanfen Iron Ore Mine;

Discuss about stage IV mining mode of Nanfen Iron Ore Mine of Beixi Iron & Steel Groups Corporation

Posskble Technical Ways of Increasing Iron Concentrate Grade of Nanfen Concentrator;

Analysis of factors influencing open-pit mine productivity;

Application of millisecond blasting technology in Lanping open-pit mine;

Methods of object-oriented and center structure of truck optimized dispatch in open-pit mine;

Overview of road dust suppressants in open pits;

Based on the analysis of causes on which the blasting boulder occurs in borehole blasting of the limestone open pit,the paper determined some measures of lowering boulder yield of borehole blasting operation in the limestone mining open pits by borehole parameters,taking explosive specific charge,charge structure,millisecond interval and detonating into design of blasting program.

This paper addresses the methodology of introducing risk into the development of mine plans for open pit mines.