一、前言正象我们在过去所知道的那样,三迭纪末期发生了印支运动,它使中国地台上升,结束了自震旦纪以来的海浸。在运动强烈的地区形成了长条形的山间凹陷沉降带。在长期的剥蚀作用下在这些凹陷带内沉积了大量的岩屑,形成了陆相的侏罗纪地层。在侏罗纪的盆地沉积中普遍夹有煤层,形成了重要的煤矿资源。最 I. INTRODUCTION As we have known in the past, the Indo-Chinese Movement took place at the end of the Triassic Period. It raised the Chinese platform and ended the sea immersion since Sinian. In the area of ​​intense movement, a strip of mountain depression subsidence belt is formed. Under the long-term denudation, a large amount of cuttings were deposited in these sag zones to form continental Jurassic strata. In the Jurassic basin sediments are generally sandwiched between coal, forming an important coal resources. most