CAJ | 학술논문

随着浅部煤炭资源逐渐枯竭,我国煤矿相继进入深部开采阶段,煤与瓦斯突出灾害愈趋严重,采用水力割缝技术对煤体卸压是煤与瓦斯突出防治的一种有效手段。以平顶山某煤矿深部突出煤层为例,进行了不同水力割缝布置方式对煤层卸压防突效果影响的数值模拟研究。计算了水力割缝切割煤体横向深度,建立了水力割缝三维有限元模型,数值模拟得到了三种水力割缝布置方式（平行、菱形、交错）对煤体X、Y向应力场影响变化规律。结果表明：交错排列的水力割缝布置方式导致应力降影响范围几乎覆盖整个煤层,X向、Y向应力降显著,应力降幅度分别为91.6%、97.8%,均大于其他两种布置方式。因此交错排列的水力割缝布置方式既可以满足卸压范围需要,同时也能够较好释放深部煤层应力,卸压防突效果较好。
수착천부매탄자원축점고갈,아국매광상계진입심부개채계단,매여와사돌출재해유추엄중,채용수력할봉기술대매체사압시매여와사돌출방치적일충유효수단。이평정산모매광심부돌출매층위례,진행료불동수력할봉포치방식대매층사압방돌효과영향적수치모의연구。계산료수력할봉절할매체횡향심도,건립료수력할봉삼유유한원모형,수치모의득도료삼충수력할봉포치방식（평행、릉형、교착）대매체X、Y향응력장영향변화규률。결과표명：교착배렬적수력할봉포치방식도치응력강영향범위궤호복개정개매층,X향、Y향응력강현저,응력강폭도분별위91.6%、97.8%,균대우기타량충포치방식。인차교착배렬적수력할봉포치방식기가이만족사압범위수요,동시야능구교호석방심부매층응력,사압방돌효과교호。
With the gradual depletion of shallow coal resources,coal mines have entered into the deep exploitation phase.Coal and gas outburst disaster will more and more serious.Using hydraulic cutting technology to coal pressure relief is an effective prevention means of coal and gas outburst.Based on gassy seam in Ping Dingshan coal mine,the effects of different arrangementsof hydraulic cutting seam on coal pressure relief and outburst prevention were numerically simulated.The cross direction depth of cutting seam was calculated.The three-dimensional finite element model of hydraulic cutting seam was established.The distribution of X and Y direction stress field were presented based on different cutting arrangements（parallel,diamond,stagger） after cutting.The results show that stress drop induced by the stagger cutting arrangement affects almost the scope of entire coal seam.The magnitude of stress drop in X and Y direction are dramatic reach to 91.6% and 97.8%,which than others two.The stagger arrangement of cutting seam to gas outburst prevention is better which not only can reach the needs of the relief range,but also release stress.