山东煤炭科技2025，Vol.43Issue(9)：194-197,4.DOI:10.3969/j.issn.1005-2801.2025.09.039
水体下采煤膨胀性软弱覆岩导水裂隙带高度研究
Research on Height of Water Conducting Fissure Zone in Dilatability Weak Overlying Rocks for Coal Mining Under Water Bodies
摘要
Abstract
When mining the layer of No.2 coal in the outcrop area of sea area in Longkou mining area,there is an existent significant safety hidden danger of seawater intrusion and water inrush due to the development of water conducting fissure zones in dilatability weak overlying rocks.Aiming at this problem,through methods of theoretical analysis,numerical simulation,similarity simulation,on-site actual measurement and so on,the development law of the water conducting fissure zone in the dilatability weak overlying rock during the mining process of No.2 coal in the sea area is studied.The research shows that over 62%of the roof strata are dilatability clay type strata with strong water resistance,resulting in a significant reduction in the height of the overlying rock fissure zone during mining of No.2 coal to 44-54 m,which is about 6.7-8.5 times the mining height and about 35%lower than the height of the conventional sandstone roof fissure zone.The actual measurement results indicate that the average height of the overlying rock water conducting fissure zone is about 8.4 times the mining height,which is basically consistent with empirical predictions and numerical simulation results.The upper limit of No.2 coal mining is determined to be approximately-160 m level.Within this range,the water conducting fissure zone is not connected to seawater,ensuring safe mining in the outcrop area of the sea area.This research result provides a water inrush prevention and control model of"lithological regulation and control-height limited mining"for coastal mining areas,which has important practical significance for similar coal mining under water bodies.关键词
水体下采煤/裂隙带高度/膨胀性岩层/相似模拟Key words
coal mining under water body/fissure zone height/dilatability strata/similarity simulation分类
矿业与冶金引用本文复制引用
王艳飞,张兆举,黄金彪..水体下采煤膨胀性软弱覆岩导水裂隙带高度研究[J].山东煤炭科技,2025,43(9):194-197,4.基金项目
中国博士后科学基金面上资助项目(52004287) （52004287）
