| | Rock mass | Depth (m) | Thickness (m) | Rock mass description |
| | Mudstone and siltstone | 756.13 | 760 | Mudstone: dark grey, carboniferous iron-sandstone; siltstone: grey, blocky, simple structure with fossil pieces | | Fine sandstone | 767.66 | 11.53 | Fine sandstone: light grey, fine-grained texture, mineral composition with hard quartz | | Mudstone | 769.6 | 1.94 | Mudstone: dark grey, blocky, fragile carboniferous with fossil pieces | | Coal seam no. 13-1 | 772.6 | 3 | Coal: black, blocky dull coal, with bright coal and specular coal bands, belongs to semibright and semidull coal | | Sandy mudstone and fine sandstone | 838.7 | 66.1 | Sandy mudstone: grey, sandy texture with muddy band, composition includes carbon in the part area, fragile. Fine sandstone: light grey, fine grained, mineral composition includes hard quartz and sandy mudstone | | Coal seam no. 11-1 | 841.3 | 2.45 | Coal: black, blocky dull coal, includes bright coal and specular coal bands, belongs to semibright coal | | Sandy mudstone | 848.2 | 2.6 | Sandy mudstone: grey, sandy texture, fragile with fossil pieces | | Sandy mudstone | 855.1 | 6.9 | Sandy mudstone: grey to dark grey, mainly sandy texture with little carbon and fine texture |
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