| Along with the mine iron ore resources consumption, the Mao Gu Ba outcrop ore within the mining area are exhausted gradually, and is going to face a crisis mine resource. So, in order to ease the resource crisis, it is an urgent need to enter the mining depth to searchinging for ore source. Magnetic exploration is one of the most rapid, efficient and economic method for magnetite. Because of its high precision magnetic ability, it can find out the deep ore bodies and the weak anomalies caused by weak magnetic body. In order to better solve the problem of mining resources facing crisis, it’s need to carry out the work of high-precision magnetic survey in mining area.The filed measurement of high precision magnetic in Mao Gu Ba area has accomplished6square meters GPS fixed point and magnetic survey data collection, and acquisition40pieces of specimens of magnetic parameters rock (ore) stone.This paper based on the collection of mining geological conditions, then, summarized the features of rock (ore) magnetic parameters and characteristics of magnetic anomaly. Delineation fourteen high precision magnetic anomaly, and do3D frequency domain transform,multi-scale wavelet decomposition and upward continuation process with the gained△T magnetic anomaly. Qualitative inference and interpretation six known ore anomalies, four ore anomalies of prospecting significance, two anomalies of unknown the nature, two interference anomalies.In the known ore anomaly and prospecting significance abnormal position, selected four typical bisects for tangent method of inversion magnetic body top buried depth, and the two and a half of man-machine interactive inversion, fitting the central buried depth,decurrent depth and thickness of magnetic body.The elevation of the PD2gallery in Shigelao was1400m in which was not seen magnetite while elevation of the PD2gallery was1441m in which was seen magnetite. Matlab software was used to write programs to do forward modeling in the consideration of Magnetic parameters, magnetic anomaly characteristics and geologic data study tunnel magnetic anomaly. We obtained the Magnetic anomaly curves when met different orebody locations, thicknesses, occurrences. And then, we determined that it is because the ore body extends along the strike direction and has been wedged out down to1400m elevation that PD2gallery was not seen magnetite while PD2 gallery was seen magnetite. The study of gallery magnetic anomaly provides a new direction of study of magnetic survey data.The expected resource of mining area are six hundred thousand tons before carrying out the work of high precision magnetic survey. Comprehensive analysis of the known ore mining area along the strike direction of extension and parallel to the peripheral vein, seeking for the concealed ore body in the prospecting area, and estimates the vision mining area resources of2.13million tons,1.53million tons are new added. So,it pointed out the direction for the next step prospecting mines work. |
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