Abstract: Ore drawing is the core of Non-pillar sublevel caving. In order to ensure the cohesion of production process phase I and phase II of Dahongshan iron mine and meet the requirements of the large parameters recovery,the stoping indicators under the condition of all parameters combination and the best ore interval and route parameters are acquired by conducting of experiments of the large parameters ore drawing and monomer and three-dimension ore drawing.So,the test results can provide some basises of theoretical guidance for the actual production situation.

Key words: Dahongshan iron mine, Large parameters, Ore drawing test, Non-pillar sublevel caving