摘要
为消除上覆含水层发生突水或淹井事故,预测导水裂隙带发育高度对顶板探放水设计十分重要。通过数值模拟、钻探注水、窥视等手段,发现21404工作面导水裂隙发育形态由初期的“拱形”逐步演化“马鞍形”,导水裂带高度呈上升趋势,并在推进距离为90 m时取得最大值,为116.8 m;注水实测结果显示,导水裂隙带最大高度为120.5 m,与多数方法间相对误差均小于5%;水化学与微生物特征表明水质类型为典型的直罗组水。表明采空区直接水源为直罗组含水层,具有滞留还原水化学特征,采空区与白垩系含水层的水力联系较弱。
Predicting the development height of water-conducting fractured zones is crucial for roof water exploration and release design in order to eliminate water inrush or well flooding accidents in overlying aquifer.Through numerical simulation,drilling and water injection,observation,it is found that the development of water-conducting fractures in 21404 working face gradually evolved from an initial“arch shape”to a“saddle shape”.The height of water-conducting fractured zones show an upward trend,and the maximum value is achieved at a pushing distance of 90 m,which is 116.8 m.The actual water injection test results show that the maximum height of water-conducting fractured zones is 120.5 m,and the relative error with most methods is less than 5%.The hydrochemical and microbial characteristics indicate that the water quality type is typical of Zhiluo Formation water.It indicates that the direct water source of the goaf is Zhiluo Formation aquifer,which has the characteristics of retained and reduced water chemistry.The hydraulic connection between goaf and Cretaceous aquifer is weak.
作者
姜坤
赵飞
吴访
郝英豪
王泽唐
王超勇
JIANG Kun;ZHAO Fei;WU Fang;HAO Yinghao;WANG Zetang;WANG Chaoyong(Zhongtian Hechuang Energy Co.,Ltd.,Erdos 017000,China;Xuzhou Datun Engineering Consulting Co.,Ltd.,Peixian 221618,China;China University of Mining and Technology,Xuzhou 221116,China)
出处
《中国矿业》
北大核心
2024年第S01期377-381,共5页
China Mining Magazine
关键词
数值模拟
注水
导水裂隙带
水化学特征
微生物种属
numerical simulation
water injection
water-conducting fractured zone
water chemical characteristic
microbial species
