鄂尔多斯盆地深部煤层开采导水断裂带发育特征
Development characteristics of water conduction fracture zone in deep coal seam mining in Ordos Basin
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摘要: 鄂尔多斯盆地多数煤矿主采侏罗系煤层,开采条件具有大采高、大采深的特点，顶板含水层众多并严重威胁矿井安全，开展侏罗系煤层上覆顶板导水断裂带高度的研究尤为重要。以鄂尔多斯某矿为例，通过理论计算、数值模拟以及相似类比法等手段，对采空区顶板的导水断裂带的发育高度和裂采比进行预测分析。结果表明：裂采比为22.07，导水断裂带发育高度大约为154.48 m，类比所得拟合公式所预测该矿的导水断裂带高度与理论计算值误差较小。Abstract: Most coal mines in Ordos Basin are mainly Jurassic coal seams. The mining conditions are characterized by large mining height and depth. The roof aquifer is numerous and poses a serious threat to mine safety. It is particularly important to study the height of the water-conducting fracture zone of the roof over Jurassic coal seam. Taking a mine in Ordos Basin as an example, through theoretical calculation, numerical simulation, and similar analogy methods, the development height and fracture-mining ratio of the water conducting fracture zone on the roof of the goaf are predicted and analyzed. The results show that the fracture-mining ratio is 22.07 and the development height of the water-conducting fracture zone is about 154.48 m. The fitting formula obtained by analogy predicts that the height of the water-conducting fracture zone of the mine is close to the theoretical calculation value.
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