Influence of Rock Strength on the Propagation of Slotted Cartridge Blasting-Induced Directional Cracks

<table class="table-group" id="tab2"><tr><td><table class="table"><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr class="thead"><td class="align_left">Rock</td><td class="align_center"><span style="width: 59.9647ptpx;"><svg height="15.0208pt" id="M123" style="vertical-align:-3.429399pt" version="1.1" viewbox="-0.0498162 -11.5914 59.9647 15.0208" width="59.9647pt" 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="M516 277C516 378 460 448 376 448C335 448 288 434 240 401C158 345 127 277 107 159C53 -161 38 -221 23 -247L28 -261C43 -260 95 -250 114 -226C122 -216 129 -199 146 -75C152 -29 157 0 164 31C182 9 206 -12 237 -12C267 -12 325 8 376 46C451 102 516 179 516 277ZM432 259C432 134 366 40 259 40C236 40 204 48 171 76L195 203C219 327 253 400 326 400C398 400 432 336 432 259Z"></path></g><g transform="matrix(.013,0,0,-0.013,9.185,0)"><path d="M300 -147C201 -63 143 98 143 270S200 602 300 686L282 710C136 610 70 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270Z"></path></g></svg></span></td></tr><tr><td class="thead-hr" colspan="7"><hr/></td></tr><tr><td class="align_left">Mudstone</td><td class="align_center">2.45</td><td class="align_center">17.0</td><td class="align_center">30</td><td class="align_center">2.7</td><td class="align_center">0.21</td><td class="align_center">0.30</td></tr><tr><td class="align_left">Sandstone</td><td class="align_center">2.5</td><td class="align_center">30.4</td><td class="align_center">58</td><td class="align_center">6.5</td><td class="align_center">0.22</td><td class="align_center">0.68</td></tr><tr><td class="align_left">Granite</td><td class="align_center">2.8</td><td class="align_center">55.0</td><td class="align_center">102</td><td class="align_center">10.5</td><td class="align_center">0.27</td><td class="align_center">1.19</td></tr><tr class="table-tr"><td colspan="7"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Physical and mechanical parameters of rock.</div>

Advances in Civil Engineering

tab2

Table 2

Table 2: Influence of Rock Strength on the Propagation of Slotted Cartridge Blasting-Induced Directional Cracks 