Wyznaczanie gęstości sieci rozpoznawczej metodą porównania map

Abstract

EVALUATION OF DENSITY OF RECOGNITION BOREHOLE NETWORK BY THE METHOD OF MAP COMPARISON Summary An attempt to determine density of prospecting network was carried out with the assumption of non-random differentiation in resources of a deposit. The studies were carried out in one of the sulfur deposit exploited by hot-water mining method. The network of sufficient recognition is interpreted here as a network sufficient for drawing map of resources which does not significantly differ from the map obtained on the basis of exploitational boreholes drilled in α m network. Maps drawn on the basis of borehole networks of different density (obtained by the method of artificial network dilution) were indirectly compared in two ways: (1) The first method of comparison involved analysis of histograms of deposit resources, made at different stages of dilution of borehole network. Resources for a given point, at which exploitational bore hole is localized, were read from the map of isolines of resources drawn on the basis of diluted network (Fig. 3). (2) The second method involved comparison of histograms of absolute differences in resources found in a given borehole and read from the map prepared for a given stage of dilution of the network (Fig. 4). The histograms were compared using test D of Smirnow-Kołmogorow at the significance level 0.05. The results obtained have shown that there is no case to reject the hypothesis assuming similarity of maps of resources drawn at the particular stages of dilution of exploitational borehole network. However, when the network is diluted to 4α m the hypothesis assuming similarity of maps drawn on the basis of boreholes spaced in the networks 4α m and α m may be rejected. It may be concluded that the spacing of the boreholes in the network of sufficient recognition should fall between 3α m and 4α m.