【摘要】 以淮北煤田临涣矿区为例,对3个不同采区的二叠系含煤地层进行了断层带面积信息维的分层计算,获得了不同开采层位的断层带面积信息维分布等值线图,并结合各煤层内构造状态和瓦斯含量对信息维的分布特征进行分析和评估。结果表明,研究区内断层带面积信息维的分维值较好地反映了断层的构造复杂程度,高分维值单元的构造相对复杂;大(中)型断裂穿过不同层位时,对应单元的分维值表现出较高的相似性;并且随着开采层位的加深,各煤层信息维的分维值从统计学特征上表现为均值减小、标准差增加。在此基础上,预测了临涣矿区深部未开发层位的断层带面积信息维分布特征,推测深部煤层中受到断层带影响的单元可能较少,但在局部单元会有密集的小断层,不利于瓦斯的逸散,因而很可能具有相对更高的瓦斯含量。更多还原

【Abstract】 Information dimensions of faults coming from Permian coal-bearing strara in three mining areas of Linhuan Coal Mine,were calculated,and the information dimensions contour maps in different coal seams were obtained as well,the distribution features of faults information dimensions were analyzed and evaluated on the basis of consideration of the structrual background and gas content.The results show that:The complexity of fault structure can be reflected by the information dimensions of fault zone’s area,and the units with high fractal dimension value mostly have complex fault structure;While the coal-bearing strata are cut through by large-medium fault,the dimensional value in the corresponding units of different coal seams have the comparative similarity;Fractal dimension values of deeper coal seam units tended to have lower mean value and higher standard deviation.Based on these results,the fault’s information dimensions distribution in deepen unexploited area were predicted.It is estimated that the units in deep part have small possibility to be affected by faults zone,however,there probably are densely developed small fault in local units,which is unpropitious to the emission of gas,thus,high gas content could be existed.更多还原