Table 3 Analysis of horizontal permeability in boreholes Y1 and Y2.
From: Investigation of change coal seam floor permeability based on pressurized water testing
Y1 VS Y2 | ||||||||
|---|---|---|---|---|---|---|---|---|
\(\:{q}_{P1}\) | \(\:{q}_{P3}\) | \(\:{q}_{P5}\) | \(\:{q}_{P5}-{q}_{P1}\) | |||||
Z | P | Z | P | Z | P | Z | P | |
Carbonaceous mudstone | - | - | - | - | - | - | - | - |
Aluminum clay mudstone | 0.2222 | 0.5776 | −1.5490 | 0.1213 | −1.5490 | 0.1213 | −1.5490 | 0.1213 |
Fine sandstone | 2.6810 | 0.0073 | 2.1910 | 0.0285 | 0.9210 | 0.3569 | 1.2900 | 0.1972 |
Benxi limestone | 0.7750 | 0.4386 | 0.7750 | 0.4386 | 0.0000 | 1.0000 | 0.7750 | 0.4386 |
Coal No.10 | - | - | - | - | - | - | - | - |
Bauxite rock | −1.9680 | 0.0491 | −0.9800 | 0.3272 | −2.4600 | 0.0139 | −2.3090 | 0.0139 |
Ordovician limestone | −1.9840 | 0.0472 | −2.3090 | 0.0209 | −2.4600 | 0.0139 | −2.4600 | 0.0139 |
Totality | 0.5270 | 0.5980 | −0.4820 | 0.6300 | −2.5860 | 0.0097 | −2.4430 | 0.0146 |
