黔西发耳矿区构造演化及煤层变形响应  

Response of coal seam deformation to structural evolution in Faer mining area,western Guizhou Province

作　　者：李明[1,2,3] 姜波[1,2] 林寿发[3] 陈玮胤[1,2] 张贵山[4] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]煤层气资源与成藏过程教育部重点实验室,江苏徐州221008 [3]加拿大滑铁卢大学地球与环境科学学院 [4]贵州发耳煤业有限公司,贵州六盘水553017

出　　处：《煤炭学报》2011年第10期1668-1673,共6页Journal of China Coal Society

基　　金：国家自然科学重点基金资助项目(40730422);国家自然科学基金资助项目(40672101);国家科技重大专项资助项目(2008ZX05034)

摘　　要：在野外和井下构造观测,以及煤层的宏观和微观变形分析的基础上,结合区域构造背景分析,探讨了发耳矿区构造演化及其对煤层变形的控制作用。研究表明:发耳矿区以"带块相间,菱形组合"的构造格局为主要特征。虽然发耳矿总体构造相对简单,但晚古生代以来的多期构造活动性现象明显。燕山中期强烈的NWW-SEE向构造挤压,造成了大部分区域近NE向的褶皱和逆断层的形成以及边界断裂两侧NW向构造的发育;燕山晚期NNE-SSW向挤压及右旋剪切作用对早期构造有所强化和改造,NW-SE向的伸展作用则造成了NE向正断层的普遍发育。煤层构造变形形成了碎裂煤、碎斑煤和揉皱煤,其变形特征分别表现为多组节理和碎斑结构以及韧性揉皱的发育。早期煤层割理经燕山中期构造改造形成了普遍发育的垂直于层面的节理,燕山晚期顺层滑动节理的发育和对前期构造的差异改造造成了构造煤变形特征的分异。Based on the observation of geologic structure in field and coal mine,combined with the analysis of coal seam macro-and microscopic deformation and regional tectonic setting,discussed the structural evolution and its controls on deformation of coal seam in Faer mining area.The results show that the tectonic framework of Faer mining area is mainly characteristicic by ＇structural belt alternate with block,rhombic combination pattern＇.Although mine structure of Faer Coal Mine is relatively simple,the indications of multistage structural activities are significant.The intense tectonic compression of NWW direction in Middle Yanshanian Epoch caused formation of reverse faults and folds trending NE in most areas and development of NW directed structures beside the boundary faults.NNE tectonic compression and dextral shearing action intensifies and modifies the early structures in Late Yanshanian Epoch and NE trending normal faults are formed by NW-SE extension.Cataclastic structural coal,mortar structural coal,and wrinkle structural coal,with deformation characteristics mainly involve the development of multiple brittle joint sets,mortar textures,and ductile folds respectively,are formed by structural deformation on coal seam.Early cleats in coal seam are commonly reformed into vertical bedding joints by Middle Yanshanian Movement.The difference in the development of bedding slip joints and the reformation of early structure formed in Late Yanshanian Movement leads to the differentiation in deformation characteristics of tectonically deformed coal.

关 键 词：发耳矿区 构造演化 煤层 变形特征 构造煤 

分 类 号：P548[天文地球—构造地质学]