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为了掌握近水平煤层条带开采沉陷实测纠偏方法的适用性,分别就采出率、采宽和采深等开采条件对该方法准确性的影响进行了研究.采用UDEC离散元数值模拟软件,基于条带采区内前2个已采条带工作面各自沉陷稳定后的实测沉陷数据,通过特定的平移叠加方式预计后续若干未采条带的累积沉陷值.实验结果表明:在采出率分别为38.5%,45.5%和55.6%,采宽分别为45,60,75 m以及采深分别为400,600 m等多种开采方案中,通过该方法所得后续5个工作面沉陷预计结果与实际模拟结果基本一致.通过误差分析证明该方法具有较高准确性和较广泛的适用性.
In order to grasp the applicability of the measured deviation correction method in subsidence mining of near horizontal coal seam strip, the influence on the accuracy of the method is studied respectively, such as recovery rate, mining width and mining depth etc. Using UDEC discrete element numerical simulation software, The measured subsidence data after the subsidence of each of the two first mining faces in the strip mining area are predicted by the specific translational superposition method.The experimental results show that when the recovery rates are respectively Which are 38.5%, 45.5% and 55.6%, 45,60,75 m for mining width and 400,600 m for mining respectively. The predicted results and actual simulation results of the subsidence of the following 5 working faces obtained by this method Which is basically the same.The error analysis shows that the method has higher accuracy and wider applicability.