Research Article
Investigation on Acoustic Emission Kaiser Effect and Frequency Spectrum Characteristics of Rock Joints Subjected to Multilevel Cyclic Shear Loads
Table 3
Statistical distribution results of tensile and shear signals in each cycle.
| | Number of cycle | (a) MPa | (b) MPa | (c) MPa | (d) MPa | | Tensile signal | Shear signal | Total signal | Tensile signal | Shear signal | Total signal | Tensile signal | Shear signal | Total signal | Tensile signal | Shear signal | Total signal |
| | Cycle 1 | 114 (54.3%) | 96 (45.7%) | 210 | 68 (65.4%) | 36 (34.6%) | 104 | 30 (52.6%) | 27 (47.4%) | 57 | 30 (63.8%) | 17 (36.2%) | 47 | | Cycle 2 | 384 (46.9%) | 434 (53.1%) | 818 | 30 (47.6%) | 33 (52.4%) | 63 | 19 (59.4%) | 13 (40.6%) | 32 | 5 (41.7%) | 7 (58.3%) | 12 | | Cycle 3 | 1062 (40.3%) | 1576 (59.7%) | 2638 | 284 (46.2%) | 331 (53.8%) | 615 | 45 (41.7%) | 63 (58.3%) | 108 | 22 (73.3%) | 8 (26.7%) | 30 | | Cycle 4 | 974 (39.5%) | 1492 (60.5%) | 2466 | 533 (52.4%) | 484 (47.6%) | 1017 | 241 (43.7%) | 311 (56.3%) | 552 | 18 (72.0%) | 7 (28.0%) | 25 | | Cycle 5 | 725 (39.0%) | 1134 (61.0%) | 1859 | 1240 (42.8%) | 1660 (57.2%) | 2900 | 588 (47.8%) | 641 (52.2%) | 1229 | 22 (48.9%) | 23 (51.1%) | 45 | | Cycle 6 | | | | | | | 1811 (43.1%) | 2392 (56.9%) | 4203 | 49 (51.6%) | 46 (48.4%) | 95 | | Cycle 7 | | | | | | | | | | 166 (47.7%) | 182 (52.3%) | 348 | | Cycle 8 | | | | | | | | | | 1225 (44.8%) | 1508 (55.2%) | 2733 | | Total | 3259 (40.8%) | 4732 (59.2%) | 7991 | 2155 (45.9%) | 2544 (54.1%) | 4699 | 2734 (44.2%) | 3447 (55.8%) | 6181 | 1537 (46.1%) | 1798 (53.9%) | 3335 |
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