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现有冲击地压危险性评价综合指数法中没有考虑采空区宽度这一影响因素。针对这一问题,以葛亭煤矿3305工作面的地质及开采情况为工程背景,运用FLAC数值模拟软件,模拟分析了一侧采空及两侧采空条件下,采空区宽度对工作面支承压力分布及集中系数的影响,结合综合指数法中关于工作面周围采动状况的结论,分析得出考虑采空区宽度的评价指数参数修正方法。
The current comprehensive evaluation method of rock burst risk does not consider the influence of gob width. In view of this problem, taking the geological and mining conditions of 3305 face of Geting Coal Mine as the engineering background, using FLAC numerical simulation software to simulate and analyze the effect of side goaf and both side goaf on the working face support Pressure distribution and concentration coefficient, combined with the conclusion of the comprehensive index method about the mining situation around the working face, the method of correcting the index value of the evaluation index considering the width of the goaf is derived.