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超化井田二１煤层空间展布具有分带性、定向性、等距性和岛列性等基本规律。趋势面分析揭示了井田尺度煤厚变化的主体特征；方向梯度和滑动窗口变异系数分析是对煤厚变异性定量描述的一种新参数。
There are some basic rules of zonal distribution, orientation, equidistance and island alignment in Zhanhua coal mine. The trend surface analysis reveals the main features of the variation of coal thickness at well scale. The analysis of directional gradient and sliding window coefficient of variation is a new parameter for the quantitative description of coal thickness variability.