The method of determining the index for predicting local roof fall has been given, the possibility of using a comprehensive index for roof weighting prediction has been discussed in detail.

初步给出了局部冒顶监报指标的确定方法；重点探索了采用回采工作面来压综合判断指标来预报顶板来压的可能性。

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Using analytic hierarchy process (AHP) to set the layer weight, in a linear weighting method to get index, the layers of harmony, end up with harmony in each of the degrees.

采用层次分析法设置各层权重，以线性加权法得到各层和谐指数，终得各年和谐度，和谐指数越接近于1，和谐度越高。

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It is also worthwhile to popularize the method of assessing the environmental quality of a small region by weighting pollution range index.

加权污染幅员指数对于评价小区域的环境质量，是一个值得推广的方法。

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