Research Article
Constant-Resistance, Rigid, and Flexible Coupling Support Technology for Soft Rock Entrances in Deep Coal Mines:A Case Study in China
Table 2
Clay mineral X-ray diffraction analysis results.
| | Number | Sample number | Relative content of clay minerals (%) | Mixing ratio (%/S) | | Smectite | Illinois/smectite | Illinois | Kaolinite | Chlorite | Chlorite/smectite | Illinois/smectite | Chlorite/smectite |
| | 1 | Medium-grain sandstone | — | 40 | — | 32 | 28 | — | 35 | | | 2 | Mudstone | — | — | 71 | 29 | — | — | — | — | | 3 | Sandy mudstone | — | 40 | 23 | 18 | 19 | — | 30 | |
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