基于回转下沉量的导水裂隙带发育高度预测  

Prediction of development height of water-conducting fracture zone based on rotational subsidence

作　　者：谢道雷 江兴洪 韩承豪 王凯 尹会永 闫久雷 XIE Daolei;JIANG Xinghong;HAN Chenghao;WANG Kai;YIN Huiyong;YAN Jiulei(College of Earth Science&Engineering,Shandong University of Science and Technology,Qingdao 266590,China;College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Feicheng Baizhuang Coal Mine Co.,Ltd.,Tai’an 271000,China;Shandong Lineng Luxi Mining Co.,Ltd.,Jining 272000,China)

机构地区：[1]山东科技大学地球科学与工程学院,山东青岛266590 [2]山东科技大学能源采矿工程学院,山东青岛266590 [3]肥城白庄煤矿有限公司,山东泰安271000 [4]山东里能鲁西矿业有限公司,山东济宁272000

出　　处：《煤矿安全》2024年第6期176-183,共8页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(41702305)。

摘　　要：导水裂隙带发育高度是煤矿顶板防治水的重要参数。通过分析采动覆岩破坏过程,将裂隙带内岩层失稳破坏划分为产生垂向裂隙、形成砌体结构和回转失稳3个阶段;建立了岩层产生垂向裂隙及回转下沉的力学模型,在此基础上,提出了分析岩石产生垂向裂隙与回转失稳的最大下沉量来判断岩层破坏情况,回转下沉量值处于这2个阶段之间的岩层形成稳定的砌体结构,得出了计算导水裂隙带高度的新方法。以营盘壕2201工作面为例,采用理论方法和数值模拟对导水裂隙带高度进行预测,通过与现场实测数据的对比,理论计算(123.3 m)和数值模拟结果 (132 m)与实测数据(115.5 m)接近,验证了所提方法的合理性。The development height of water-conducting fracture zone(WCFZ)is an important parameter for water disaster treatment in coal mine roof.In this paper,the failure process of mining overlying rock is analyzed,and the rock instability failure in the fracture zone is divided into three stages:vertical fracture formation,masonry structure formation and gyratory instability;a mechanical model of vertical cracks and gyration subsidence is established.On this basis,the maximum subsidence of vertical cracks and gyration instability is analyzed to judge the rock failure.The rock stratum with gyration subsidence value between these two stages forms a stable masonry beam structure,and a new method for calculating the height of WCFZ is obtained.Taking the 2201 working face of Yingpanhao as an example,the height of the WCFZ is predicted by theoretical method and numerical simulation.By comparing with the field measured data,the theoretical calculation(123.3 m)and numerical simulation results(132 m)are close to the measured data(115.5 m),which verifies the rationality of the proposed method.

关 键 词：导水裂隙带 关键层 回转下沉量 防治水 岩层破坏 

分 类 号：TD745[矿业工程—矿井通风与安全]