| Mine flood is one of the five major geological disaeter in coal mine safety production of the mine serious.27%of the coal mines are facing the problem of water disasters. Huaibei mining area belongs to north China carboniferous-ordovician limestone water disasters threat area, limestone aquifer water and the water pressure is large, the water inrush accidents happen many times. Therefore, in this paper, the research of coal floor waterproof ability and limestone aquifer water content in suntuan NO.103mining area have great significance.Collect and statistics the geological data and the Hydrogeological data.Analysis the Drilling data, lithology and their combination, the thickness of coal floor, rock mass structure characteristics, physical and mechanical properties of rock mass, the lithology of limestone aquifer thickness, water pressure, unit water inflow. Studied the floor waterproof ability and the characteristics of the limestone aquifer water in NO.103coal mining area. The main achievements and knowledge are:(1) Research on the limestone aquifer thickness, unit water inflow, the karst fissure development situation and the water pressure of taiyuan group, the results is that taiyuanNo.1～4grey aquifer group belongs to medium permeability permeable-weak layers.(2) Research on the lithology, thickness, bottom combination and compressive strength of floor water-resisting layer, the results is that Waterproof performance of No.10coal floor is well.(3) Research on the rock mechanics parameters of No.10coal floor.Use numerical simulation technique (FLAC3D). Established a three-dimensional model. Determines the maximum depth of floor destruction.(4) Using grey fuzzy comprehensive evaluation method. Select the fracture fractal dimension value, limestone aquifer water pressure, floor sandstone rate, the effective thickness of water-resisting layer and foor compressive strength.Evaluate the risk of water inrush of the study area. |
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