摘要
在煤田地质和矿井地质资料分析的基础上,揭示了王楼井田构造特征及组合规律,结合区域构造背景,分析了井田自煤系形成后构造演化历史。研究表明,王楼井田构造以多组发育的正断层为主要特征,且表现出"深部较浅部复杂、南部较北部复杂"的分布规律,近NS向正断层控制了井田构造格局;而褶皱主要发育于中南部区域,表现出NE向和NWW向的宽缓背斜和较为紧闭的向斜相间隔槽式褶皱组合特征。王楼井田经历了印支期、燕山期和喜马拉雅期三期挤压-伸展的变形过程,印支期构造作用在研究区表现较为微弱,在燕山期中期强烈的SE-NW向挤压应力作用下,形成了NE-NNE向压性逆冲断层和近NS向压剪性逆断层;燕山晚期和喜马拉雅期的NE和NWW伸展应力作用不仅导致了NW-NWW向正断层的形成,并对早期构造具有较为强烈的改造作用,导致早期逆断层反转为正断层,从而形成了区内以正断层为主的构造格局。
Based on an analysis on the minefield geology and mine geological information, the structure features and combined law of Wanglou Minefield were revealed. In combination with the regional structure background, the paper had an analysis on the structure evolution history since the coal measures formed of the minefield. The study showed that the muhi group developed normal fault was the main features of Wanglou minefield structure. The distribution with ＂ the deep section more complicated than the shallow section and the south part more complicated than north part＂ was appeared. The NS normal faults controlled the minefield structure nearly. Folds were mainly developed in the south - central part area and there trough- like fold combined features between the NE directional and NWW directional wide and slow anticline and closed syncline appeared. The Wanglou Minefield had gone the extending extrusion deformation process during the Indosinian, Yanshannian and Himalayan periods. The structure role of the Indosinian was weak in the study area. Under the strong SE - NW extrusion stress role in the middle of Yanshannian, NE - NNE pressurized thrust fault and NS pressurized shear reversed fault were formed. The NE and NWW extended stress role during the Yanshannian Later Period and Himalayan Period would not only cause the formation of the NW - NWW normal faults, but would have a strong reconstruction role of the initial strncture, made the initial reversed faults turned to normal faults and thus the structure pattern mainly with the normal faults in the study area formed.
出处
《煤炭工程》
北大核心
2013年第12期116-119,共4页
Coal Engineering
基金
中央高校基本科研业务费专项资金资助(2012LWB79)
关键词
王楼井田
构造特征
构造演化
Wanglou minefield
structural features
structural evolution
