应用趋势面分析法预测煤层冲刷带——以铁法大隆井田为例

Coal Seam Scouring Belt Prediction through Trend Surface Analysis——A Case Study of Dalong Minefield, Tiefa Coalfield

根据铁法煤田大隆井田钻探和矿井地质资料,应用趋势面分析法对4#煤层顶板3m范围内砂体累计厚度进行拟合,由二次趋势面图和二次趋势面剩余图来分析砂体累计厚度在区域上的变化规律和局部异常特征,据此所确定的4#煤层冲刷带的位置和展布方向与矿井实见的4#煤层冲刷带吻合程度较好,表明应用趋势面分析法预测煤层冲刷带的可行性。在此基础上,应用该方法预测了大隆井田尚未开采的12#煤层的冲刷带;预测的结果可供采场设计参考,以避免或降低煤层冲刷带对采煤生产的负面影响。

Based on drilling and mine geological data in the Dalong minefield, Tiefa coalfield, carried out cumulative thickness fitting of sand body within 3m range above No.4 coal roof, analyzed regional sand body thickness variation pattern and local anomalous features through secondary trend surface map and secondary trend surface residual map. Determined location and extending direction of coal seam No.4 scouting belt coincided with coalmine actual scouring belt better thus indicated the method is feasible. On these grounds, predicted scouring belt of not yet mined coal seam No.12 in the minefield through the method, the result can be a reference in stope design to avoid or lowering down the negative effect of coal seam scouring belt on coal mining production.