CAJ | 학술논문

针对我国煤矿绝大部分煤层属于渗透率低，地质条件复杂、瓦斯抽采效果差的特点，运用了FLUENT仿真软件，结合渗流力学理论，以薛湖矿二2煤层为工程背景，模拟顺煤层钻孔抽采的煤层压力、煤层渗透率、抽采负压、钻孔直径、抽采时间等因素，分析顺煤层钻孔瓦斯抽采规律，为类似顺煤层钻孔抽采设计提供科学依据；通过三种尺寸顺层钻孔工业实验，并从施工难易程度和经济效果以及抽放率的角度，确立了采用Φ75 mm钻孔的抽放工艺；同时采用高压注水增大煤层透气性的方式进一步提高煤层瓦斯的抽放量。
침대아국매광절대부분매층속우삼투솔저，지질조건복잡、와사추채효과차적특점，운용료FLUENT방진연건，결합삼류역학이론，이설호광이2매층위공정배경，모의순매층찬공추채적매층압력、매층삼투솔、추채부압、찬공직경、추채시간등인소，분석순매층찬공와사추채규률，위유사순매층찬공추채설계제공과학의거；통과삼충척촌순층찬공공업실험，병종시공난역정도화경제효과이급추방솔적각도，학립료채용Φ75 mm찬공적추방공예；동시채용고압주수증대매층투기성적방식진일보제고매층와사적추방량。
According to the reality that most of the coal seams in China are low-permeability coal seams , the geolo-gy condition is complicated and the gas extraction rate is low , in this article, by using FLUENT software , combi-ning with the fluent seepage theory , and taking No .2 coal seam of Xuehu Mine as the engineering background , the coal seam pressure , coal seam permeability , negative pressure of gas drainage , borehole diameter , gas drainage time in gas drainage of bedding drilling in coal seam were simulated , and the rules of gas drainage in coal seam were analyzed , which can provide scientific basis to the gas drainage in similar coal seam .Through the industrial experiments of bedding drilling under three dimensions , the 75 borehole drainage process was established by the an-gle of the ease of construction , economic effect and the drainage rate .At the same time , the high-pressure injection technology was applied to increase gas permeability of coal seam and to further improve the drainage volume .