闽西南地区煤层形变影响因素分析

闽西南地区主要含煤地层为二叠系下统童子岩组，区内总体构造为新华夏构造体系龙岩山字型构造，在该体系下形成的褶皱、断层以及火成岩侵入是造成本区煤层形变的主要因素。褶皱主要以纵弯作用、横弯作用和不协调褶曲作用使煤层产生千姿百态的形变效应；断层的影响主要表现为断层无煤带和断层两侧煤厚变化带；火成岩侵入可造成横切无煤带和煤层局部变薄、吞蚀现象等。

Coal Seam Deformation Characteristics and Deformational Factors in Southwestern Fujian Area

Main coal-bearing stratum in the southwestern Fujian area is the Tongziyan Formation of lower Permian System. Overall structure in the area is the Longyan ？ structure of the Neocathaysian structural system, folds, faults and igneous rock intrusions formed under the system are main deformational factors. Longitudinal bending, transversal bending and disharmonic folding of folds make coal seams come into different deformations; impacts of fault are mainly appear as faulted coal barren zone and coal seam thickness change about zone along the faults; while igneous rock intrusion can cause cross-cutting coal barren zone and coal seam thinning locally and even engulfed etc.