潘谢矿区新生界底部沉积物特征与沉积演化分析

通过对潘谢矿区新生界底部沉积物岩性特征、厚度分布、物质来源及沉积剖面等综合分析,得出该矿区古地形主要受构造、岩性以及风化作用等控制,在此基础上形成的底部砾石层与"红层"在整个空间分布呈非均匀性的特征,东部潘集矿区以砂砾层、砂层和含砾石粘土层为主,沉积厚度大,物源为就地风化和远处水流搬运物;西部张谢矿区以"红层"为主,成分混杂,厚度小,不连续,主要分布在山前低洼处,为山区"剥高填低、就地沉积"的沉积特征。底部松散沉积物主要有洪积环境、坡积环境以及河流环境下形成的沉积物,并依此推断了潘谢矿区底部松散层的沉积演化过程,洪积和河流冲刷作用对沉积物的形成及改造较为突出。研究成果为矿井在开采浅部煤层过程中,对于"底含"水的防治提供了重要的参考依据。

Cenozoic Bottom Sediment Characteristics and Sedimentary Evolution Analysis in Panxie Mining Area

The comprehensive analysis of Cenozoic bottom sediment characteristics, thickness distribution, provenance and sedimentary sections in the Panxie mining area has demonstrated that the paleotopography in the area is mainly controlled by structure, lithology and weathering. The spatial distribution of bottom gravel layers and ＂red beds＂ formed on this basis present heterogenetic characteristics. The Panji mine area in the east is mainly sandy gravel, sand and pebbly clay layers with large thickness, provenances have in situ weathered material and fluvial sediments from distance; the Zhangxie mine area in west is mainly “red beds” with complicated composition, small thickness and discontinuity, mainly distributed in piedmont depressions, with mountain area leveling characteristics. Bottom loose sediments have diluvium, talus and alluvium, accordingly deduced the sedimentary evolution process of bottom loose sediments in Panxie mining area; the role of pluvial and fluvial scouring in sediment formation and reformation especially prominent. The result can provide important reference for “bottom aquifer” hydrogeological characteristics study and control during the mining of shallow part coal seams.