Abstract:

Structure characteristics of rock and orebody in deep borehole are obtained by borehole camera technology. Based on theory of metallogeny and geostatistics, distribution rules of different kinds of discontinuity are summarized and relevance analysis is carried out between discontinuities’ dominant orientation and lodes’ extension direction. Comparative analysis is carried out between the result of lodes’ connectivity and the actual depth of orebody. The result indicates: (1) In the high-resolution digital borehole image, discontinuities’ orientation and other parameters of rock and orebody in deep borehole can be showed visually. (2) There are some differences between discontinuities’ dominant orientation of different statistical zone in the borehole: the distribution of discontinuities in the rock is discrete with no obvious regular pattern, and the distribution of discontinuities in the orebody is more centralized with apparent dominant orientation. (3) There are more orebody in the boreholes whose orientations are forecasted by the data of ZK61 than in the boreholes whose orientation are not. Forecast results are consistent with a higher degree of actual lodes distribution, suggesting method of analyzing lodes’ extension direction based on digital borehole camera technology is feasible.'ép.

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