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以榆阳区三台界煤矿3#煤层为例,采用理论计算和数值模拟实验2种方法对该煤层导水裂隙带发育规律及最大高度进行研究。结果表明:第一,理论公式计算值和数值模拟实验结果都反映了该矿3#煤层开采产生的导水裂隙带不会对矿区主要含水层产生影响,体现了良好的一致性;第二,数值模拟结果与《三下一上规程》理论计算结果更为接近,说明导水裂隙带最大高度为60 m左右更为可靠。
Taking the No.3 Coal Seam of SanTaijie Coal Mine in YuYang District as an example, two methods of theoretical calculation and numerical simulation are used to study the developmental rules and the maximum height of the water-conducting fractured zone in this coal seam. The results show that: first, the calculated results of the theoretical formula and the results of numerical simulation all reflect that the water-bearing fractured zone produced by the mining of No.3 coal seam in this mine will not affect the main aquifer in the mine and show good consistency; secondly, The result of numerical simulation is closer to the theoretical calculation result of “next next procedure”, which shows that the maximum height of water-conducting fracture zone is more reliable about 60 m.