Table 3 Calculation results of key stratum tensile ratios.
Key stratum number | Rock lithology | Intermediate stratum elevation (m) | L0 (m) | L1 (m) | Stratum stretching rate (%) |
|---|---|---|---|---|---|
Key stratum 4 | Limestone | 132.96 | 164.87 | 164.81 | − 0.036 |
Primary key stratum 3 | Limestone | 48.75 | 60.45 | 60.53 | 0.132 |
Key stratum 2 | Fine sandstone | 13.62 | 16.89 | 17.17 | 1.657 |
Sub-key stratum 1 | Siltstone | 2.54 | 3.15 | 4.75 | 50.794 |
