Main problems in balance wire rope use are:(1) coal box dropping leading to balance wire rope pounded breaking;
平衡钢丝绳使用的主要问题是：（1）坠罐造成平衡钢丝绳被砸断；
In one hand she was carrying a coal scuttle, in the other a box of briquets.
她一只手里拿着个煤斗，另一只手里拿着煤饼箱。
Based on the displacement curves of top coal with different strength, the fractal dimension of which is analyzed and calculated according to the box dimension.
本文根据不同煤体强度条件下综放开采顶煤的位移曲线，采用盒维数的分形计算方法对其进行了维数分析。
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