CAJ | 학술논문

本文考察了位村矿二。煤煤层气地质特征，并运用经验类比，等温曲线和数值模拟三种方法预测气体采收率。研究结果表明：N2＋CH4带位于位村矿北部，深在-100--250m煤层底板等高线之间，北西部较浅，北东部较深；矿井中部气含量达到最高，北东部含气量随埋深增加较快，南西部增加较慢；区内较大的正断层附近不利于煤层气的保存，煤层气含量降低；煤层段含水性弱，有利于煤层气的保存和排水降压；综合三种采收率预测方法，预计该区二，煤采收率为40％。
본문고찰료위촌광이。매매층기지질특정，병운용경험류비，등온곡선화수치모의삼충방법예측기체채수솔。연구결과표명：N2＋CH4대위우위촌광북부，심재-100--250m매층저판등고선지간，북서부교천，북동부교심；광정중부기함량체도최고，북동부함기량수매심증가교쾌，남서부증가교만；구내교대적정단층부근불리우매층기적보존，매층기함량강저；매층단함수성약，유리우매층기적보존화배수강압；종합삼충채수솔예측방법，예계해구이，매채수솔위40％。
The paper investigated the geological characteristics of CBM in No. 2-1 coal seam in Weicun Mine. Three methods, namely, the analog method, isothermal line, and numerical simulation, were ap- plied for prediction of gas recovery rate. The results indicated that N2 + CH4 zone was located in North- ern part of Weicun mine with a burial depth varying from floor contour line -100m to 250 m, and the bur- ial depth of north-west was relatively shallow, and that of north-east part was deeper. The gas content in the middle of the mine reached the maximum. The gas content in north-east part increased rapidly with the increase of the depth. However, the gas content in south-west part increased with the depth slowly. Within the zone, the occurrence of a large normal fault was unfavorable to conservation of CBM. The gas content dropped. The water-containing property of the seam section was weak, which was favorable to conservation of CBM and dewatering for pressure relief. Based on the result of these three methods, the predicted recovery rate of No. 2 -1 seam in the zone was 40%.