THE STRUCTURAL COMPOUNDING AND ITS SIGNIFICANCE IN SAFETY MINING IN PANJIAAN MINING AREA,XUZHOU
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摘要: 通过对徐州潘家庵矿区宏观构造特征及小断层统计分析,得出黄淮地区石炭二叠纪含煤地层沉积后,历经两期或两期以上构造运动,存在两套构造应力场。两期地质构造大角度横跨复合,是导致含煤盆地底部凹凸不平的主要原因。同时形成NNE-NEE方位的应力拉伸区,该方位的构造形迹显压性或压剪性是很好的隔水构造;SN-NW-NWW向为应力压缩区,该方位倾角大于45°的正断层多显张性或张剪性,是良好的储导水和排气构造。Abstract: Based on the macrostructural character and statistical analysis of small faults in Panjiaan Mining Area,it is concluded that two or more phases of tectonic movement had been undergone,and two sets of stress field were existed after the Permo-Carboniferous coal-bearing strata deposited in Huang-Huai region.The geological structures of two phases are compounded transversally at a large angle, and it is the main cause which resulted the uneven floor of coal basin.At the same time,an extensional area with the orientation of NNE-NEE was formed,the structural track in this orientation shows the compressional or compresso-shear nature,and it is a better watertight structure;in a stress compressional area with the orientation of SN-NW-NWW,the normal faults with the dip angle larger than 45° in this orientation show mostly tensional or tensiono shear nature,and it is a better water-storaging and producing structure and degassing structure.
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Keywords:
- compouding of structure /
- stress analysis /
- Panjuaan Mining Area /
- Xuzhou
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