广东省兴梅煤田控煤构造样式及其控煤意义研究

Research on Structural Pattern and Its Coal-controlling Significance in Xingmei Coalfield,Guangdong Province

兴梅煤田在区域构造位置上位于华南褶皱系永梅-惠阳拗陷东北段的永梅凹褶断束,区内煤系赋存特征与控煤构造样式关系密切。运用构造控煤分析方法,根据后期控煤构造几何形态、特征及形成机制,将兴梅煤田构造样式分为伸展构造样式、压缩构造样式、滑动构造样式、滑推叠加构造样式和剪切与旋转构造样式5大类13种类型。本区以轴向北西(含北北西、北西西)的褶皱控煤构造较为多见,其煤系赋存较稳定,可形成较大面积的赋煤单元;伸展构造样式常使煤系失去连续性;压缩构造样式、滑推叠加构造样式、滑动构造样式常造成煤系地层重复,增加资源量,但煤系受破坏显著,含煤块段连续性较差、面积一般较小,煤矿规模多为小型。

The Xingmei coalfield is situated in the Yongmei bundle of sags, folds and faults in the northeastern Yongmei-Huiyang depression of the South China fold system tectonically. The coal measures hosting features and coal-controlling stractural pattern are closely related. Using the structural coal-controlling analysis method, according to later stage coal-controlling structure geometry, characteristics and formation mechanism, divided the structural pattern in Xingmei coalfield into 5 categories of extentional, compressional, gliding, superimposed gliding-napping and shearing ＋ rotational structural patterns and 13 types. NW （NNW, NWW） axial folding coal-controlling structures are common in the area with rather stable coal measures hosting and may form large area coal hosting units. Extensionl structural pattern brings coal measures losing its continuity very common. Compressional, superimposed gliding-napping, gliding structural patterns are usually made coal measures strata repeated, increasing coal resources, but obviously destructed coal measures, continuity of coal-bearing sectors poorer, and smaller areas generally, most coalmine scopes are small sized.