巨厚弱胶结覆岩导水裂隙带演化特征及发育高度预测方法  

Evolution characteristics and development height prediction method of waterconducting crack zone in thick weak cemented overlying strata

作　　者：李怀展 孙兢超 郭广礼[2] 唐超[2] 郑辉 张连贵 孟凡贞 LI Huaizhan;SUN Jingchao;GUO Guangli;TANG Chao;ZHENG Hui;ZHANG Liangui;MENG Fanzhen(Engineering Research Center of Ministry of Education for Mine Ecological Restoration,China University of Mining and Technology,Xuzhou 221116,China;Collaborative Innovation Center for Resource Utilization and Ecological Restoration of Old Industrial Base,China University of Mining and Technology,Xuzhou 221116,China;Yankuang Energy Group Company Limited,Jining 273500,China)

机构地区：[1]中国矿业大学矿山生态修复教育部工程研究中心,江苏徐州221116 [2]中国矿业大学江苏省老工业基地资源利用与生态修复协同创新中心,江苏徐州221116 [3]兖矿能源集团股份有限公司,山东济宁273500

出　　处：《煤炭科学技术》2025年第2期289-300,共12页Coal Science and Technology

基　　金：国家自然科学基金面上资助项目(51974292,42174048)。

摘　　要：巨厚弱胶结覆岩导水裂隙带发育高度对陕蒙弱胶结矿区煤炭生产安全与地下水资源保护具有十分重要的意义。研究发现该矿区上覆白垩系岩层具有厚度大、强度低、结胶性差且节理不发育等特点,然而该地区煤炭开采时覆岩破坏剧烈导水裂隙带发育较高,裂采比达到30左右,严重威胁矿井生产安全。如何精准预测巨厚弱胶结覆岩导水裂隙发育高度,已成为巨厚弱胶结矿区煤炭安全高效开采的关键之一。基于此,以石拉乌素矿区某工作面为研究背景,利用UDEC数值模拟软件结合实测数据,探究了巨厚弱胶结覆岩导水裂隙带演化特征,得出了巨厚弱胶结覆岩导水裂隙带整体形态呈“△”特征,与东部呈“马鞍形”特征具有显著差异,且其形态及发育高度受采高、弱胶结岩层厚度和位置等因素影响,巨厚弱胶结覆岩对导水裂隙带发育形态及高度有较显著的控制作用。在此基础上,采用板理论建立了巨厚弱胶结覆岩导水裂隙带发育高度预测模型,并在石拉乌素矿区进行了应用,验证了构建模型的有效性和准确性。The development height of water-conducting fracture zone in thick weakly cemented strata is of great significance to coal pro-duction safety and groundwater resource protection in Shaanxi-Inner Mongolia weakly cemented mining area.The study found that the overlying Cretaceous rock layer in the thick weakly cemented mining area has the characteristics of large thickness,low strength,poor ce-mentation and undeveloped joints.However,during coal mining in this area,the overburden is severely damaged and the water-conduct-ing fracture zone is highly developed,with a fracture-to-mining ratio of about 30,seriously threatening the production safety of the mine.How to accurately predict the development height of water-conducting fracture zone in thick weakly cemented overburden has become one of the keys to safe and efficient coal mining in thick weakly cemented mining area.Based on this,this paper takes a working face in Shilawusu mining area as the research background,and uses UDEC numerical simulation software combined with measured data to ex-plore the evolution characteristics of water-conducting fracture zone in thick weakly cemented overburden.It is concluded that the overall shape of water-conducting fracture zone in thick weakly cemented overburden is“△”,which is significantly different from the"saddle"characteristics in the east.Moreover,its shape and development height are affected by mining height,thickness and location of weakly ce-mented rock layer and other factors.The thick weakly cemented overburden has a significant control effect on the development shape and height of water-conducting fracture zone.On this basis,a prediction model for the development height of water-conducting fracture zone in thick weakly cemented overburden is established using the plate theory,and it is applied in the Shilawusu mining area,verifying the ef-fectiveness and accuracy of the established model.

关 键 词：弱胶结覆岩 覆岩裂隙发育形态 导水裂隙带高度 预测模型 

分 类 号：TD745[矿业工程—矿井通风与安全]