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用导水裂缝带广义损伤因子确定了导水裂缝带的最大高度.采用概率积分法研究了导水裂缝带的移动变形对其断裂损伤的影响.结果表明:导水裂缝带广义损伤因子的大小与其断裂损伤程度成正比,当导水裂缝带广义损伤因子小于某一特定值时,此处覆岩的断裂损伤不具有导水性,并以榆树湾煤矿20102上工作面开采为例,计算出其导水裂缝带广义损伤因子D0为1.67×10-3,裂缝带的最大高度为89m,与现场实测90m基本吻合,验证了该方法的可靠性.
The maximum height of water-conducting fractured zone was determined by using the generalized damage factor of water-conducting fractured zone.The influence of displacement deformation of water-conducting fractured zone on its fracture damage was studied by the method of probability integration.The results show that the size of generalized damage factor Is proportional to the degree of fracture damage. When the generalized damage factor of the water-conducting fractured zone is less than a certain value, the fault damage of the overlying strata does not have water conductivity. Taking the mining of the face of 2010 in Yushuwan Coal Mine as an example, The generalized damage factor D0 of water-conducting fractured zone is 1.67 × 10-3, and the maximum height of the fractured zone is 89m, which is in good agreement with the field measured 90m, which verifies the reliability of this method.