渡口煤田的大地构造位置,处于杨子准地台上康滇地轴的西部边缘。北北东方向的攀枝花—姚安大断裂带直接控制着煤田的形成。大养地含煤系厚2200多米。主要由粗碎屑岩组成。含煤系数为2％,含煤达130余层。根据岩石成因标志,含煤系可以划分为山麓相及河流-湖沼相沉积两大类。每一类沉积相还可进一步划分出若干沉积亚相。含煤 The structure of the earth in the ferry area of ​​Dukou is located on the western edge of Kangdi-Dianxi axis on the Yangzi quasi-platform. The north-east direction of Panzhihua-Yao’an fault zone directly controls the formation of the coalfield. Large area of ​​coal-rich Department of more than 2,200 meters. Mainly composed of coarse clastic rocks. Coal-bearing coefficient of 2%, coal up to 130 layers. According to the rock cause sign, the coal-bearing system can be divided into foothills and rivers - lacustrine facies deposition two categories. Each type of sedimentary facies can be further divided into several sedimentary subfacies. Containing coal