Water inflow prediction and calculation method based on hydrogeological model of adjacent mines after mine closing

Abstract

The invention provides a water inflow prediction and calculation method based on a hydrogeological model of adjacent mines after mine closing. The method comprises the steps: 1, establishing the hydrogeological model of the adjacent mines after mine closing; and 2, predicting and calculating the water inflow based on the hydrogeological model of the adjacent mines after mine closing. The step 1 further comprises the following steps: 11, analyzing a water filling condition after pit closing of the mine; and 12, determining the water filling condition after pit closing of the mine. The boundarycondition in the step 11 comprises that a natural geological boundary of a relatively large fault is used as a boundary; or an artificial technical boundary is taken as the boundary. In the step 1, seepage motion of the hydrogeological model of the adjacent mines after mine closing conforms to the Darcy law of the hydrogeological theory, and in the step 2, a Darcy formula is adopted to predict andcalculate influence of pit closing of the mine on mining of the adjacent mine and the water inflow. The Darcy formula is Q = KIF, wherein Q represents the water inflow in the unit of m3 / min, F represents the seepage section area in unit of m2, I represents the hydraulic gradient, and K represents a permeability coefficient.

Description

technical field [0001] The invention relates to the field of coal mine water prevention and control industry, in particular to a method for predicting and calculating water inflow based on a hydrogeological model of an adjacent mine after the mine is closed. Background technique [0002] The method for analyzing the impact on the mining of adjacent mines after the mine is closed and calculating the seepage flow is used in the technical field of coal mine water disaster prevention and belongs to the industry of coal mine water prevention and control. With the mining of coal mines, a large number of mines have been closed due to the exhaustion of resources. In many mining areas, especially the Hanxing mining area, many mines are not bounded by natural geological boundaries such as faults, but by artificial technical boundaries. Analysis from the perspective of hydrogeology , although some mines are different mines, they belong to the same hydrogeological unit. Therefore, once...

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Problems solved by technology

At present, the domestic analysis of the impact of mine closure is mainly from the aspects of environmental impact analysis and evaluation and the closure plan, and from the perspective of water prevention and control, the analysis and evaluation method of the impact of mine closure on the safe mining of adjacent mines As well as hydrogeological model establishment and water inflow prediction, there are no domestic related reports

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