Effects of Initial Porosity and Water Pressure on Seepage-Erosion Properties of Water Inrush in Completely Weathered Granite

<table class="table-group" id="tab1"><tr><td><table class="table"><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr class="thead"><td class="align_left">Natural density/g cm<sup>−3</sup></td><td class="align_center">Natural moisture/%</td><td class="align_center">Porosity</td><td class="align_center">Permeability coefficient/cm s<sup>−1</sup></td><td class="align_center">Cohesion <svg height="6.1673pt" id="M2" style="vertical-align:-0.2063904pt" version="1.1" viewbox="-0.0498162 -5.96091 5.39742 6.1673" width="5.39742pt" 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="M383 397C383 424 344 448 299 448C244 448 172 409 132 375C66 319 23 227 23 146C23 42 74 -12 146 -12C208 -12 298 30 359 103L343 124C315 95 248 48 192 48C145 48 111 85 111 163C111 228 129 294 151 330C171 363 201 401 241 401C275 401 302 384 325 356C332 347 339 344 348 348C373 360 383 381 383 397Z" id="g113-100"></path></g></svg><sub>uu</sub>/kPa</td><td class="align_center">Internal friction angle <svg height="8.68572pt" id="M3" style="vertical-align:-0.0498209pt" version="1.1" viewbox="-0.0498162 -8.6359 9.93839 8.68572" width="9.93839pt" 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="M488 658H270V630C328 626 335 619 335 579C217 574 44 509 44 330C44 147 221 88 335 86C335 38 328 32 265 28V0H488V28C425 32 418 38 418 86C534 88 710 153 710 337C710 517 538 575 418 579C418 619 425 626 488 630V658ZM335 118C249 124 136 180 136 337C136 490 251 543 335 547V118ZM418 547C502 543 618 491 618 333S503 124 418 118V547Z" id="g113-150"></path></g></svg><sub>uu</sub>/°</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left">1.9</td><td class="align_center">17</td><td class="align_center">0.36</td><td class="align_center">4.05 × 10<sup>–4</sup></td><td class="align_center">60.2</td><td class="align_center">1.9</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Physical and mechanical parameters of completely weathered granite.</div>

Geofluids

tab1

Table 1

Table 1: Effects of Initial Porosity and Water Pressure on Seepage-Erosion Properties of Water Inrush in Completely Weathered Granite 