According to the typical conditions of special water preserved mining area, the aquiclude stability with two equispaced tilling strips is analyzed by using the physical simulation experiment and theoretical analysis, and the mechanical model of elastic foundation beam of strip tilling aquiclude strata is set up.Based on that, the calculation method of load and the compression displacement of the tilling strip is presented, and the deflection formula of the water resisting beam is given, and the position and depth of the downward crack is determined.Based on the aquiclude stability criterion, the calculation method of reasonable tilling strip width and interval width is put forward.The result shows that the reasonable strip interval increases with the increase of the mining height, the thickness and strength of the beam, and the depth of the downward crack is mainly relate.
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