Abstract
In order to evaluate water inrush risk from the deep coal floor by mining above the confined aquifer in mining area, the structural complexity of the study area was partitioned by fractal dimension method. Moreover, the water inrush coefficient was calculated. Quantization partition was also carried out using the distribution law of the water inrush coefficient contour. It is found that the structural complex area and the water inrush danger zone have good coincidence in parts of study area, which increases the estimating reliability of the water inrush risk. The research results have an important reference value for realizing safe and efficient mining of the second level coal seams.
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