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可保盆地位于小江断裂带西支主干断裂(嵩明—华宁断裂)东侧,盆内断裂及褶皱构造发育,以南北向及北北东向为主。含煤地层为新近系中新统,4个含煤段共含煤30余层,其中可采27层,煤层总厚度110.87m。受西侧盆缘断裂F41及基底控制,厚煤带围绕宋家地背斜倾伏方向呈带状分布,在垂向上煤层明显向东超覆迁移。
The Bao-bao basin is located on the east side of the western branch of the Xiaojiang fault zone (Songming-Huaning fault). The faults and fold structures in the basin developed mainly in the north-south and north-north east. The coal-bearing strata are Neogene Miocene. The four coal-bearing sections contain more than 30 layers of coal, of which 27 layers are recoverable. The total thickness of the coal seam is 110.87m. Affected by the basin edge fault F41 and the basement control in the west, the thick coal belt distributes in strip shape around the leaning direction of the anticline in the Songjia area, and the coal seam in the vertical direction obviously migrates to the east.