Research on water-richness of aquifers based on sequence relation analysis-independent weight coefficient method
In order to evaluate the water-richness of sandstone aquifer in Shanxi Formation of No.4 coal roof in Fengjiata Coal Mine,five influencing factors,including Shanxi Formation water-rich sandstone thickness,core taking rate,interbedded layer number of sand and mudstone,brittle-plastic rock thickness ratio and sandstone lithology coefficient,were selected.The subjective weight affecting the water-richness in Shanxi Formation sandstone aquifer was calculated by sequence relation analysis method,the objective weight was calculated by independent weight coefficient method,and the comprehensive weight was obtained by multiplication synthesis method.The water-richness evaluation model was constructed.The results show that the in Shanxi Formation sandstone aquifer of No.4 coal roof in Fengjiata Coal Mine has strong and strong water-richness areas mainly distributed in the southern and western parts of the minefield,while the weak wa-ter-richness areas are mainly in the northern and central parts of the minefield.By comparing the results of mine geophysical prospecting,underground water accumulation areas,and pumping tests,the prediction model has a high accuracy and is consistent with reality.
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