Research on Mechanical Properties and Macroscopic Fracture Evolution of Rock with Different Joint Plane Features

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left" rowspan="2"><span style="width: 16.9021ptpx;"><svg height="12.9474pt" id="M1" style="vertical-align:-2.150701pt" version="1.1" viewbox="-0.0498162 -10.7967 16.9021 12.9474" width="16.9021pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M545 106L524 126C493 85 467 65 455 65C438 65 427 113 405 238C448 295 498 362 543 439L533 448L478 435C453 386 423 331 398 295H395C370 404 347 448 282 448C169 448 23 309 23 153C23 54 65 -12 128 -12C203 -12 283 70 339 155H341C360 29 380 -12 411 -12C444 -12 491 11 545 106ZM333 204C265 95 210 54 169 54C137 54 113 96 113 171C113 302 191 405 252 405C301 405 318 306 333 204Z"></path></g><g transform="matrix(.013,0,0,-0.013,7.385,0)"><path d="M368 703H309L44 -163H104L368 703Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,12.746,-5.741)"><path d="M339 262C339 340 273 403 193 403S48 340 48 262S113 121 193 121S339 184 339 262ZM283 262C283 210 242 168 193 168S104 210 104 262S144 356 193 356S283 314 283 262Z"></path></g></svg></span></td><td class="align_center" colspan="2">Failure stress (MPa)</td><td class="align_center" rowspan="2">Elasticity modulus (GPa)</td></tr><tr class="thead"><td class="align_center"><span style="width: 11.8314ptpx;"><svg height="9.4347pt" id="M2" style="vertical-align:-3.29111pt" version="1.1" viewbox="-0.0498162 -6.14359 11.8314 9.4347" width="11.8314pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M548 455L523 469C505 448 490 439 461 439C416 439 374 447 316 447C144 447 23 310 23 161C23 47 89 -12 179 -12C312 -12 429 106 429 244C429 303 419 344 368 386L371 388C404 383 440 378 474 378C507 378 530 411 548 455ZM350 274C350 191 308 25 198 25C144 25 108 75 108 157C108 264 170 395 276 395C296 395 320 384 333 360C347 334 350 316 350 274Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,6.76,3.132)"><path d="M290 377C321 398 342 415 358 430C378 450 389 473 389 502C389 578 329 635 238 635H237C184 635 137 610 109 578L64 515L88 493C112 529 154 573 208 573S303 542 303 482C303 409 233 370 141 341L149 308C165 313 190 319 215 319C272 319 341 283 341 193C342 98 292 43 222 43C163 43 122 72 96 94C88 101 79 100 70 94C61 87 47 73 46 60C44 47 48 37 62 23C76 10 118 -12 165 -12C238 -12 430 62 430 223C430 297 379 359 290 375V377Z"></path></g></svg></span></td><td class="align_center"><span style="width: 11.8314ptpx;"><svg height="9.32509pt" id="M3" style="vertical-align:-3.1815pt" version="1.1" viewbox="-0.0498162 -6.14359 11.8314 9.32509" width="11.8314pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M548 455L523 469C505 448 490 439 461 439C416 439 374 447 316 447C144 447 23 310 23 161C23 47 89 -12 179 -12C312 -12 429 106 429 244C429 303 419 344 368 386L371 388C404 383 440 378 474 378C507 378 530 411 548 455ZM350 274C350 191 308 25 198 25C144 25 108 75 108 157C108 264 170 395 276 395C296 395 320 384 333 360C347 334 350 316 350 274Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,6.76,3.132)"><path d="M389 0V32C297 38 291 46 291 118V635C234 613 175 595 109 583V556L161 554C203 552 207 547 207 497V118C207 46 201 38 110 32V0H389Z"></path></g></svg></span></td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">10°</td><td class="align_center">1</td><td class="align_center">27.25</td><td class="align_center">9.58</td></tr><tr><td class="align_left">15°</td><td class="align_center">1</td><td class="align_center">19.2</td><td class="align_center">7.67</td></tr><tr><td class="align_left">20°</td><td class="align_center">1</td><td class="align_center">16.8</td><td class="align_center">2.8</td></tr><tr><td class="align_left">25°</td><td class="align_center">1</td><td class="align_center">14</td><td class="align_center">3.0</td></tr><tr><td class="align_left">30°</td><td class="align_center">1</td><td class="align_center">11.2</td><td class="align_center">1.79</td></tr><tr><td class="align_left">35°</td><td class="align_center">1</td><td class="align_center">9.8</td><td class="align_center">1.83</td></tr><tr><td class="align_left">40°</td><td class="align_center">1</td><td class="align_center">7.6</td><td class="align_center">1.17</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Triaxial compression test results of mudstone specimens with different joint plane angles.</div>

Shock and Vibration

tab1

Table 1

Table 1: Research on Mechanical Properties and Macroscopic Fracture Evolution of Rock with Different Joint Plane Features 