| Water damage of the coal mine is a major threat to the coal mining, fault inrush have lareger proportion, therefore, to identify the water conductivity of the fault is significant to prevent the mine water hazard. In this article, Anchong-Zhonghua graben parallel through the Gucheng Coal Mine from east to west, as the two graben's rich water and hydraulic conductivity properties is unkown, these unkown factors will take a security risk during the consruction and coal mining, therefore, to study the graben's rich water and hydraulic conductivity is great significant to prevent the mine water hazard.In this article, we take the hydraulic connection among the aquifers as a starting point, analysis the lithology combination of each aquifer characteristics, chemical characteristics of water, fissures and filling reles on the basis of fleld hydrogeological survey and data collection. Analysis the ion content of each aquifer groundwater, D-O relations, find the chemical types of each aquifer groudwater and the replenishment through the water chemistry and isotope methods. The result shows that each aquifer groundwater's main flow direction is horizontal, almost has no vertical hydraulic connection; each aquifer's water-rich is weak in addition to the part of the Ordovician limestone water; groundwater is treated as the"old-water"forming a retention area due to it's poor water-alternate; has the same supply source, precipitation.The interpretation of the spatial distribution of the graben through the high-resolution seismic survey providing a strong basis for the validation water conductivity of Ordovician aquifer water.In this article, we transform the graben's water conductivity to each aquifer's water conductivity, have a clear entry point and research approach. Chemistry and isotopic methods are the main line, combined with the field hydrogeological survey and data collection, analysis and appraisal the graben's water conductivity, providing detail hydrogeological data for the coal mining. |
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