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瓦斯抽采孔裂隙连通率直接决定瓦斯的抽采效率,为了更加精确地定量表征裂隙网络连通率,优化瓦斯钻孔布置位置,理论上,基于钻孔裂隙度的概念,提出“等效体积原理”钻孔三维连通率新算法,并引入盒维数验证了该算法的合理性。同时,依托平顶山八矿己15-14120工作面,开展真实采动过程煤岩体裂隙动态窥视试验,并在CAD平台上矢量化裂隙数据。结果表明采用“等效体积原理”计算己15-14120工作面裂隙网络连通率比传统一维连通率计算结果偏小,前者比后者更符合现场实际情况。
In order to more accurately and quantitatively characterize the connectivity of fractured networks and optimize the location of gas drilling holes, in theory, based on the concept of borehole fracture degree, the equivalent volume Principle “drilling hole three-dimensional connectivity rate of new algorithms, and the introduction of box dimensions verify the rationality of the algorithm. At the same time, relying on the Pingdingshan 8 mine has 15-14120 face, to carry out the dynamic mining process of coal and rock fracture dynamic peep test, and in the CAD platform vectorized fracture data. The results show that using the ”equivalent volume principle", the calculation results of the network connectivity rate of 15-14120 face are smaller than the traditional one-dimensional connectivity ratio, the former is more in line with the actual situation in the field.