Structure Characteristics Of Longkou Mining Area And Its Control Mechanism On Oil Shale

The oil shale of Longkou production, structure and its control on the morphology and the taste of oil shale mineralization has important influence on the rationality and economy of mining, therefore researching on the control mechanism of structure and mining area of oil shale of the major structure has great significance. Based on the systematical analysis of characteristics of the oil shale of Longkou mining area and research information on geology and oil shale, with the main line of structure dynamic envolution, this paper deeply discussed strcture development, compositon, properties and distribition, expounded tectonic controlling mechanism on oil shale. Throuth frcatal dimension, quantitatively evaluated the complexity of the mine structure, analyzed coupling relationship between structure complexity and the taste of oil shale. In Liangjia Mine, the east oil shale taste different from west, through the research discovery, the reason for this phenomenon is the control action of rock properties, hydrological conditions, structural forms of ground temperature.Fracture is the main structure in Longkou mine, broad and gentle fold growth in local area. The fault strike mainly includes NE, NEE and NW, most of the faults dip angle greater than 60 o and all normal fault. Mining folds extending direction mainly into three groups, respectively is NW-NNW, EW, NE. Structural phenomena summarized, the structure of mining area has symmetry, isometry, structure combination rules. Cretaceous NW-SE direction tensile stress and converted to the tensile stress caused by the NWWSEE basin boundary. which makes the basal formation of uneven settlement, showing the north terrain higher than south, has created the condition for the formation of coal and oil shale depression. The dual role of synsedimentary tectonic field of Himalaya period of oil shale control operation with destruction and aggregation. Fault uplift and drop two plate, affect the deposition and erosion of the oil shale rock. At the same time, the depth changes affect oil shale taste of the upper and lower two plates.Fractal evaluation results of mine structural complexity shows that mine structure is more complicated in general, value of the fractal dimension of the region reaches 1.27, but the complexity of mine structures have obvious inhomogenety, exists reletively simple regions in comparatively complicated context. They exist the weak coupling between structural complexity and oil shale oil rate. In Liangjia Mine, The east oil shale taste different from west, the reasons for this phenomenon are mainly: Rock density of small, low moisture content, causes the thermal resistance, low thermal conductivity of rocks, earth up internal conduction heat is stored up, resulting in the increase of the temperature of rock. Hydrogeological conditions are moderately simple. Gathered in the oil shale strata in the heat dissipation is not easy. Liangjia Mine is located in the west of Beima syncline and Wangjia anticline, sedimentary rock anisotropic heat conductivity eventually lead to the east of temperature is higher than the western.