Study on Strength Damage Evolution Regulation of Sandstone under Cyclic Erosion

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="9"><hr/></td></tr><tr class="thead"><td class="align_left">Erosion cycle/T</td><td class="align_center">0</td><td class="align_center">5</td><td class="align_center">10</td><td class="align_center">15</td><td class="align_center">20</td><td class="align_center">30</td><td class="align_center">Fitting relationship</td><td class="align_center">Fitting coefficient</td></tr><tr><td class="thead-hr" colspan="9"><hr/></td></tr><tr><td class="align_left">Compressive strength/MPa</td><td class="align_center">50.42</td><td class="align_center">41.93</td><td class="align_center">30.99</td><td class="align_center">23.92</td><td class="align_center">17.67</td><td class="align_center">13.39</td><td class="align_center"><span style="width: 90.2051ptpx;"><svg height="14.8825pt" id="M12" style="vertical-align:-3.2911pt" version="1.1" viewbox="-0.0498162 -11.5914 90.2051 14.8825" width="90.2051pt" 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356 478 356 390C356 371 355 347 352 325C330 309 297 297 262 297C179 297 127 369 127 456C127 515 156 598 231 598Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,84.658,-5.741)"><path d="M504 89L488 119C453 85 428 69 416 69C408 69 405 75 412 102L462 304C492 438 460 451 436 451S388 441 356 423C311 397 229 336 170 256H168L189 340C208 418 200 451 177 451C144 451 82 413 24 352L40 322C65 345 98 369 108 369C114 369 119 363 112 335L28 -3L36 -12C54 -3 83 4 112 10C125 73 138 122 153 174C205 258 328 382 376 382C395 382 399 369 384 305L330 93C312 25 323 -12 351 -12C378 -12 439 21 504 89Z"></path></g></svg></span></td><td class="align_center">0.99</td></tr><tr><td class="align_left">Elastic modulus/GPa</td><td class="align_center">8.41</td><td class="align_center">6.84</td><td class="align_center">4.62</td><td class="align_center">3.01</td><td class="align_center">2.93</td><td class="align_center">2.50</td><td class="align_center"><span style="width: 76.2014ptpx;"><svg height="11.7978pt" 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<div>Results of sandstone mechanical parameters after different erosion cycles.</div>

Geofluids

tab2

Table 2

Table 2: Study on Strength Damage Evolution Regulation of Sandstone under Cyclic Erosion 