关键词: 金矿, 坑内钻, 采取率

Abstract: Mingshan Gold Deposit is a large Carlin-type gold deposit located at the junction of Lingyun County and Fengshan County in Guangxi. In order to verify the rationality of ore body connection， the typical ore block is encrypted by using pit drilling.Through the analysis of drilling quality，it is clear that the degree of stratum breakage and the dip angle of drilling are the main factors affecting the core re⁃ covery rate of drilling in the pit.The verification results show that the overall continuity of the ore body in the typical ore block is good，but the local ore body morphology changes greatly.The grade of ore block de⁃ creased after drilling in the pit，which may be related to the low rate of drilling.Pit drilling has the advantag⁃ es of high efficiency，economy and safety，but its disadvantage is that the core recovery rate of rock (ore) cannot be guaranteed when encountering the structural fracture zone of thick layer and the lack of borehole bending data.The feasibility of this method should be determined according to the mining situation in prac⁃ tice.

Key words: gold mine, pit drilling, resource verification