Abstract: This paper has analyzed and studied their rock mechanics parameter,mineral composition,grain sizes and microscopic structure of the ore for both Anqian mine and Qidashan iron mine,detected the influence of ore characters of microscopic composition,structure feature,mineral component to drilling ability,know the intrinsic influencing factor of drilling ability,disclosure the ultimate reasons for drilling difficulties and low service life of drill bit at Anqian mine.This paper has graded drilling ability and forecasted the bit life length of the ore for both Anqian mine and Qidashan iron mine,which provided the scientific base of material consumption rate and base data for optimizing bit matching with ore character and drilling rig working parameters that have guiding meaning for Anqian mine.

Key words: Anqian mine, Ore character, Abrasive action, Drilling ability, Bit life