Research On The Fault Structure’s Development Characteristics And Distribution Law Of Huaibei New Mining Area

With the increase in mining depth, the deep environment brought tremendous problems to the coal mine production and safety. Therefore, to study and master the mode of occurrence of deep coal resources and a series of mining geological problems was the key to solve the fundamental problems of deep coal resources development.This paper studied the fault structure development characteristics and fold structure development characteristics of Huaibei new mining area, researched on the correlation between minor faults and medium faults in Guoyang mining area and Suxian mining area with the fractal theory, comprehensively evaluated geological formations in the depth of Suxian mine area using grey fuzzy theory, discussed on the correlation between fault fractal dimension values and fold plane deformation coefficient, the relation between the fault fractal dimension and formation dip trend in Guoyang mine area. The results came out as follows:1. Fault structure in Huaibei new mining area is more developed, of various sizes, various forms of fracture, and distribution vary from place to place. The main normal fault strikes were the NE and NNE, the minority is NW and nearly EW. The reverse fault strikes were the NNE mainly, and developed some NNW and NNE faults, varied in fault direction. The fold strikes were changeable in this region, mainly the NNE, NE, NNW and nearly SN, the dominant directions were NNE and nearly SN.2. Choosing the fault breakpoints with greater or equal to5meters drop length in each kilometers as the evaluation index, the increasing of the fractal dimension value, the more break point. It indicated that small fracture developed by large and medium fracture.3. Appling fault density, fault strength and fractal dimension to quantitatively analyze the fault development strength in deep area of Qinan coal mine, as a whole, fault density and fractal dimension were large in shallow area, smaller in deep area, structure development level decreasing from shallow to deep. Using the gray fuzzy comprehensive evaluation method, it provided that derived the32and10coal seam structure belonged to simple-medium type. By contrastive analysis,32coal seam structure was slightly larger than the10coal seam structure, the Minefield’s structure was simpler from deep to shallow.4. There was a good correlation between fault fractal dimension value and fold plane deformation coefficient in Liudian and Guobei coal mine, the former increases as the latter. The trend of fold fractal dimension value and the formation dip trend remain the same.5. In the north of Huagouxi coal mine, the structure was mainly simple and medium, in the south mainly medium and complex, existing complex-extremely area. The fractal dimension increased from north to south, northern area was deeper than southern area, so the deep structure was simpler than shallow.