The Porosity Dynamic Model of the Compacted Broken Coal

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="5"><hr/></td></tr><tr><td class="align_left">Coal sample</td><td class="align_center">Parameter <i>A</i></td><td class="align_center">Parameter <i>b</i></td><td class="align_center">Fitting function</td><td class="align_center">Fitting degree</td></tr><tr><td class="align_left" colspan="5"><hr/></td></tr><tr><td class="align_left">1#</td><td class="align_center">0.2698</td><td class="align_center">19.317</td><td class="align_center"><span style="width: 98.0731ptpx;"><svg height="14.9008pt" id="M44" style="vertical-align:-3.3094pt" version="1.1" viewbox="-0.0498162 -11.5914 98.0731 14.9008" width="98.0731pt" 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 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-12C272 -12 344 31 386 91L367 118C325 76 274 50 222 50C163 50 120 84 120 138C120 191 169 218 223 218C247 218 263 217 278 216L312 260L308 267H259C200 267 167 297 167 338S202 414 250 414C297 414 326 387 336 341C338 331 341 328 349 328C361 328 396 349 396 374Z"></path></g><g transform="matrix(.0065,0,0,-0.0065,93.732,-3.641)"><path d="M219 86C216 168 211 250 206 337C201 410 189 448 163 448C131 448 79 396 43 344L60 322C91 359 110 375 118 375S132 358 136 298C141 238 152 81 155 -12H182C242 62 331 177 390 258C435 321 451 360 451 391C450 424 432 448 408 448C390 448 372 435 366 419C362 410 362 401 366 394C373 383 376 367 376 350C376 283 262 138 221 86H219Z"></path></g></svg></span></td><td class="align_center">0.9906</td></tr><tr><td class="align_left">2#</td><td class="align_center">0.2997</td><td class="align_center">19.792</td><td class="align_center"><span style="width: 98.0731ptpx;"><svg height="14.9008pt" id="M45" style="vertical-align:-3.3094pt" version="1.1" viewbox="-0.0498162 -11.5914 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<div>The fitting parameters of the stress-strain curve.</div>

Advances in Civil Engineering

tab3

Table 3

Table 3: The Porosity Dynamic Model of the Compacted Broken Coal 