Research Article
Study on Multiparameter Precursory Information Identification of the Fracture of Yellow Sandstone
Table 2
Early warning table of body strain precursory information.
| Numbering of rock samples | Peak stress (MPa) | Peak time (s) | Volume minimum strain (%) | Volume minimum strain time (s) | Precursory warning time (s) | Percentage of total time in advance (%) | Average value (%) |
| sz-17 | 103 | 1219 | 0.93 | 1080 | 139 | 11.4 | 11.4 | sz-18 | 113 | 1316 | 1.04 | 1177 | 139 | 10.6 | sz-20 | 105 | 1223 | 0.85 | 1085 | 138 | 11.3 | sz-21 | 107 | 1270 | 0.85 | 1106 | 164 | 12.9 | sz-22 | 106 | 1245 | 0.78 | 1103 | 142 | 11.4 |
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