压煤开采安全上限标高数值模拟研究

Numerical Simulation Studies of Mining Upper Limit Elevation

针对桃山水库下铁麒煤矿主要压煤煤层受到水库上方水患的影响,以桃山水库下铁麒煤矿主要压煤煤层的地质条件为背景,运用计算机FLAC3D数值模拟软件进行煤层开采的建模及模拟,针对其塑性区发育特征的变化进行分析,得出煤层开采后导水裂隙带的最大发育高度为57 m,并分析得出铁麒煤矿桃山水库下压煤煤层的安全开采上限标高为+12 m,作为最终开采最大上限取值。研究结果为铁麒煤矿后续煤层的开采提供了参考依据,指导生产实际。

Aiming at the flood＇s influence of the major coal seam of Tieqi coal mine under Taoshan reservoir, for the background of the geological conditions which the major coal seam of Tieqi coal mine uhder Taoshao reservoir, model and simulate the coal seam mining by the computer numerical simulation software FLAC^3D, analysis the changes of developmental characteristics of plastic zone, come to a conclusion which the maximum developmental height of the fracture zone of water after coal seam mining is 57 m, and the safe mining upper limit is ＋12 m of which coal seam of Tieqi coal mine under Taoshan reservoir, which to be as the value of the final mining maximum. The finding provides reference for the subsequent seam mining of Tieqi coal mine, guides practice production.