| Clay Mineral Composition Roof Sediment | ||||||||
| No | Sample | Litology | Containing Silicified Coal | Kaolinite (%) | Illite (%) | Smectite (%) | Mixed Layer (%) | Total (%) |
| I/S R1 (Nat) - Irregular | ||||||||
| 1 | Roof Sediment Seam-D | Carbonaceous Claystone | Yes | 47.47 | 21.27 | 13.73 | 17.54 | 100.00 |
| 2 | Roof Sediment Seam-E | Carbonaceous Claystone | No | 35.78 | 17.88 | 21.59 | 24.76 | 100.00 |