| Caijiaying lead-zinc-silver deposit, as a well-known large deposits, not only has considerable reserves of lead, zinc and silver, but also is a typical ore with relatively high study level. The III orebelt deposits is in a unique geological conditions and is very rich in mineral resources. The orebelt, lies in northeast of the Caijiaying mine.is compased by the main mineral lead, and gold as well as other useful minerals,which makes it as a multi-metal deposits. The ore-body of III ore-belt is mainly hosted in the upper amphibolite plagioclase granulite rocks of Archean hongqiyingzi group, and part of the ore-body extends to variegated shale and gravel rock of the Jurassic Baiqi group. The eastern exposed and western covered make this belt a semi-concealed mineral deposits. Based on digital technology and its enormous economic benefits as well as integrate the international mining reserves calculation, we establishing three-dimensional visualization model in this belt of Caijiaying ore.The three-dimensional visual modeling in the mine is one of the key technologies of Digital Mine. In this article, we establish the collar database on the base of 142 drilling, 9023 data, which provided by " The detailed investigation of the geological report of Caijiaying III belt in Zhangbei County, Hebei Province"on the Surpac platform. The information in this database includes the drill location, drill measurement and the laboratory analysis of samples, etc. From establishing this collar database, we realizing the any 3D direction vision of the drill, displaying the 3D coordination, the extending direction, dip of the drilling holes, as well as kinds of data in different depth. Because of the complex structural geology condition and the limited time, we only constructed the roughly space ore occurrence of the major ore-body 22,27 and 29 with the interactive three-dimensional modeling tool provided by the Surpac software. In addition, on the basis of the principles of topology, we constructed the solid model, which can be viewed in any direction, rotated by any angle and got any cutting section of ore-body as you want. Based on the solid model and the ore grade distribution of the samples, we establish the block model of the ore-body using the inverse method from the power law of the distance. From all of the above work, we can say that the construction of the 3D geological model greatly simplifies the complexity of traditional hand-mine work.With the grade model, we draw the any direction ichnography and profile of the ore-body on the computer, which achieved the visual of the main mining system of the mine and the dynamic management of mine production, as well as improved the ability of the intelligence and automation of.the mine. Using the results of the estimated value of the block model, we got the average grade on the different boundary grade and the corresponding amount of metal volume and the reserves of the ore-body. This reserve results are more scientific, as this method overcome the shortcoming of the traditional fragment method-the subjectivity and the low accuracy, which can not accepted by the international reserve certification. On the basis of the geology law, we studied the variation of the ore-grade in the vertical direction and analyzed the special distribution of the ore-forming elements. According this work, we got this conclusion:the Zn-ag grade decreased from top to down while the Au increasing at the same time. That is to say, the ore type may changes from zn-ag to au orebody as the depth increase. Then we prove the scientific guidance of this prediction from the perspective of mantle branch structure. Results of this study provided scientific guidance to the mining production, more importantly, provided a scientific basis for mineral exploration at depth and exploration design. |
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