Study on Gas Control in Goaf of High Gas Coal Seam: A Case Study of Tingnan Coal Mine, China

<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">Thickness (m)</td><td class="align_center">Texture</td><td class="align_center">Dip angle (°)</td><td class="align_center">Recoverable coefficient</td><td class="align_center">Variation coefficient</td><td class="align_center">Stable degree</td></tr><tr><td class="thead-hr" colspan="6"><hr/></td></tr><tr><td class="align_left"><span style="width: 60.9446ptpx;"><svg height="26.2885pt" id="M1" style="vertical-align:-9.4319pt" version="1.1" viewbox="-0.0498162 -16.8566 60.9446 26.2885" width="60.9446pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,1.196,-8.508)"><path d="M384 0V27C293 34 287 42 287 114V635C232 613 172 594 109 583V559L157 557C201 555 205 550 205 499V114C205 42 199 34 109 27V0H384Z"></path></g><g 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199L72 187C91 236 136 270 188 270C216 270 246 250 272 232C311 205 353 180 400 180C472 180 522 242 548 311Z"></path></g><g transform="matrix(.013,0,0,-0.013,22.33,-8.508)"><path d="M137 343C167 482 260 545 321 574C357 591 397 603 429 609L423 641C382 634 335 622 295 608C189 570 37 457 37 238C37 84 125 -12 242 -12C362 -12 447 89 447 209C447 311 374 393 267 393C247 393 226 386 204 376L137 343ZM227 337C318 337 361 256 361 173C361 105 336 22 258 22C176 22 126 120 126 240C126 266 127 291 132 310C155 323 189 337 227 337Z"></path></g><rect height="0.65243" width="27.4501" x="1.19551" y="-3.65364"></rect><g transform="matrix(.013,0,0,-0.013,11.789,9.225)"><path d="M456 178V225H360V632H320C217 496 115 347 20 206V178H280V106C280 40 276 34 189 27V0H445V27C364 34 360 39 360 106V178H456ZM280 225H82C149 335 214 431 278 520H280V225Z"></path></g></svg></span></td><td class="align_center">100%</td><td class="align_center">9.6%</td><td class="align_center">Stale</td></tr><tr class="table-tr"><td colspan="6"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Situation of coal seam in 206 working face.</div>

Geofluids

tab1

Table 1

Table 1: Study on Gas Control in Goaf of High Gas Coal Seam: A Case Study of Tingnan Coal Mine, China 