CAJ | 학술논문

以袁店矿首采1021工作面为例，应用大型工程FLAC30计算软件，模拟分析煤层首采长壁22作面开采后上覆岩层“三带”移动演化特征和矿压显现规律．结果表明：受回采工作面的呆动影响，在工作面煤壁前方，形成了随工作面推进而不断前移的超前集中应力，大体可分为3个阶段：工作面前方62m以远为未受采动影响区，20—62m为采动影响区，20m范围内为采动影响剧烈区；工作面前方超前支承应力最大值为40．61MPa，超前支承应力集中系数为2．58；走向模型的冒落带高度约在6～10m范围内，导水裂隙带高度约在34～40m范围内；弯曲下沉带的高度约在顶板90—100m范围内．
이원점광수채1021공작면위례，응용대형공정FLAC30계산연건，모의분석매층수채장벽22작면개채후상복암층“삼대”이동연화특정화광압현현규률．결과표명：수회채공작면적태동영향，재공작면매벽전방，형성료수공작면추진이불단전이적초전집중응력，대체가분위3개계단：공작면전방62m이원위미수채동영향구，20—62m위채동영향구，20m범위내위채동영향극렬구；공작면전방초전지승응력최대치위40．61MPa，초전지승응력집중계수위2．58；주향모형적모락대고도약재6～10m범위내，도수렬극대고도약재34～40m범위내；만곡하침대적고도약재정판90—100m범위내．
By taking Yuandian first mining face 1021 as an example, this paper applies large engineering FLAC3D calculation software to simulation analysis of first mining coal seam long wall workface after mining overlying strata movement and evolution characteristics of "three zones" and the behavior law of mine pressure. Results show that the working face in mining influence, ahead of the coal face, formed with the advance of working face and the continuous advancement of leading concentrated stress, generally can be divided into 3 stages, i.e. the front 62 m beyond is not affected, 20 - 62 m area is influenced by mining, and the 20 m range for the effect of mining area in front of the working face is severe; advance support stress maximum value is 40.61 MPa, advance support stress concentration factor is 2.58 ; to the model about the height of caving zone in the 6 - 10 m range, the height of water flowing fractured zone is about 34 - 40 m range ; flexural subsidence zone of height is in the range of 90 - 100 m degrees about roof.