Table 2 Three-dimensional coordinates of five geophones.
From: Research on instability characteristics and precursory effect of coal-rock parting-coal structures
Geophone no. | x/m | y/m | z/m |
|---|---|---|---|
T3 | 20,401,540 | 3,909,734 | − 862 |
S10 | 20,401,333 | 3,909,338 | − 827 |
T11 | 20,401,277 | 3,909,711 | − 843 |
S14 | 20,401,976 | 3,909,822 | − 916 |
T12 | 20,401,312 | 3,909,598 | − 832 |
