摘要
中生代形成的逆冲推覆构造对煤层影响很大。以位于唐山块陷之上开平煤田西北侧的开滦唐山矿区域背景分析为基础,从研究构造规律出发,通过几何学、运动学和动力学分析,主要探讨了以FIII逆断层为主体的逆冲推覆构造特征。结果显示,唐山矿推覆构造的走向与煤田内褶皱轴大致平行,沿地层走向呈NE向;其以前展式扩展方式自NW向SE方向逆冲;燕山运动早-中期,库拉-太平洋板块与欧亚板块的相互强烈挤压作用是该推覆构造的主要动力来源。另外,受褶皱和断层等构造控制,特别是受推覆构造的控制,唐山矿煤层厚度变化显著,局部出现煤仓。
The thrust tectonic formed in the Mesozoic era has a terrific impact on the changes of coal seams,no exception for Tangshan mine located on the northwest to Kaiping coalfield on Tangshan block depression.Based on the regional background and structure rules of Tangshan mine,and combined with the theories of geometrical characteristics,kinematics and dynamics,this paper discussed the characteristics of thrust tectonic by taking FIII reverse fault as the dominant factor.The result shows that the trend of nappe structure is approximately parallel with axis of folds in the coal field,trending NE along the formation strike.The nappe structure was inversely moved from NW to SE.The intensive compression between the Kula-Pacific plate and the Eurasian plate of early-middle period of Yanshan movement was the main power to form this nappe structure.Besides,controlled by folds and faults,especially by nappe structure,the variation of coal seam thickness is remarkable,and coal bunkers appear partially,which is inconvenient for mining coal.
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2011年第2期7-12,共6页
Coal Geology & Exploration
关键词
推覆构造
构造特征
构造控煤作用
开滦唐山矿
nappe structure
structure characteristic
structurally controled coal
Tangshan mine in Kailuan
