| The No.100 ore-body of Gaofeng ore district in Guangxi Province, mainly contain tin element, and also contain other element like lead, zinc, antimony, argent and so on.. With the help of computer, the theory and method of geostatistics are used to study the mathematic-economical model of No.100 ore-body. And as a result, we can use the model to make dynamic management and make full use of source for exploiting the ore-body. The research results are listed as follows:200 prospecting project, 3200 samples and 10500 grade data include their coordinate have been collected, and general-statistical-analysis has been made to all the data. The result is that Sn, Pb, Zn, Sb and Ag belong to normal distribution. And original three-dimensional coordinate database has been established for all these elements, and the database can be dynamic used by mine.The variation function curves of three direction has been calculated and fitted, and they are nugget effect. The mathematic models of Sn, Pb, Zn, Sb and Ag have been established. And by so, a result has been make that the No, 100 ore-body is strap variational by direction, and its error is small within permitted area.According to the shape and the direction of the ore-body in space, the lithology model of the No. 100 ore-body has been established, partially.And according to geology character and mineralized enrichment law of the ore-body, the grade of the No.100 ore-body has been calculated by 2mX2mX2m cube meters in volume, and Kring is used in it. And different ore has been plotted out by different permitted grade. The reserves of Sn, Pb, Zn, Sb and Ag has been estimated by different layer and row. And the grade economical model was established at last.On the base of the grade model of the No.100 ore-body, the mineral models of cassiterite, boulangerite, iroblende, arsenopyrite, pyrite and FeS1-x have been established. A lot of charts have been plotted and the content of different mineral has been calculated. And of these can come into being the basis for integrate use and exploiting the No.100 body.By contrasting different scheme for technological economy , and improving mill craftworks and high mill skill, we selected the scheme of using the richest ore-body and the fittest block, to achieve the following product line: market(product) mill providing mine (the second matching mine) mining matching mining(the first matching mine) plan and deciding, and it is a kind of dynamic management . And it can make the source exploitation to be scientific rationality and beneficial.
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