Table 2. Variation of effective value UR of coal gangue samples with frequency.
f (MHz) | Coal 1 | Coal 2 | Coal 3 | Gangue 1 | Gangue 2 | Gangue 3 |
|---|---|---|---|---|---|---|
0.1 | 0.041 | 0.037 | 0.031 | 0.148 | 0.165 | 0.132 |
0.3 | 0.096 | 0.08 | 0.083 | 0.388 | 0.434 | 0.349 |
0.5 | 0.139 | 0.115 | 0.115 | 0.554 | 0.627 | 0.507 |
0.7 | 0.165 | 0.137 | 0.143 | 0.664 | 0.738 | 0.619 |
0.9 | 0.176 | 0.154 | 0.16 | 0.738 | 0.812 | 0.683 |
1.1 | 0.195 | 0.16 | 0.169 | 0.784 | 0.849 | 0.72 |
1.3 | 0.206 | 0.167 | 0.176 | 0.83 | 0.867 | 0.757 |
1.5 | 0.21 | 0.173 | 0.184 | 0.84 | 0.877 | 0.775 |
1.7 | 0.218 | 0.177 | 0.184 | 0.858 | 0.895 | 0.784 |
1.9 | 0.221 | 0.18 | 0.191 | 0.858 | 0.895 | 0.794 |
2.1 | 0.225 | 0.182 | 0.191 | 0.867 | 0.895 | 0.803 |
2.3 | 0.229 | 0.184 | 0.195 | 0.886 | 0.895 | 0.803 |
2.5 | 0.229 | 0.186 | 0.195 | 0.895 | 0.895 | 0.812 |
2.7 | 0.229 | 0.19 | 0.199 | 0.895 | 0.895 | 0.812 |
2.9 | 0.233 | 0.192 | 0.199 | 0.895 | 0.886 | 0.812 |
3.1 | 0.236 | 0.195 | 0.199 | 0.895 | 0.877 | 0.812 |
3.3 | 0.236 | 0.197 | 0.199 | 0.895 | 0.877 | 0.812 |
3.5 | 0.236 | 0.197 | 0.199 | 0.895 | 0.877 | 0.812 |
3.7 | 0.24 | 0.199 | 0.203 | 0.895 | 0.867 | 0.812 |
3.9 | 0.244 | 0.201 | 0.203 | 0.895 | 0.877 | 0.812 |