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本文应用工程可靠度理论，推导出考虑指标变异性时开采覆岩破坏带高度的概率表达式，初步用实例验证了其可信性后，将其应用于金乡矿区北区覆岩破坏高度的预测。
Based on the theory of engineering reliability, this paper deduces the probability expression of the height of the overburden rock mining when considering the variability of the index. After verifying the credibility with examples, it is applied to the height of the overburden failure in the northern part of Jinxiang mining area prediction.