近距离重复开采导水裂隙带发育问题研究  

Study on Development of Water-flow Fractured Zone during Closedistance Repeated Coal Mining

作　　者：栾元重[1] 于水[1] 郭传超 郭凯维 史耀凡 董岳[1] 栾亨宣[2] LUAN Yuanzhong;YU Shui;GUO Chuanchao;GUO Kaiwei;SHI Yaofan;DONG Yue;LUAN Hengxuan(College of Geodesy and Geomatics,Shandong University of Science and Technology,Qingdao 266590,China;College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]山东科技大学测绘与空间信息学院,山东青岛266590 [2]山东科技大学机械电子工程学院,山东青岛266590

出　　处：《煤炭技术》2022年第5期115-118,共4页Coal Technology

基　　金：山东省自然科学基金面上项目(ZR2020MD024);山东省自然科学基金(ZR202103070165)。

摘　　要：山东省某煤矿开采的3_(上)、3_(下)煤的层间距较近,属于近距离煤层开采。以煤矿近距离开采工作面为工程背景,针对重复开采中导水裂隙带的高度发育问题采用经验公式计算、现场实测与数值模拟的方法进行了研究。研究结果表明:相较于经验公式,FLAC^(3D)数值模拟在运用于近距离重复开采时误差更小,适用性更强;导水裂隙带的发育高度随开采进度呈“缓慢-快速-缓慢-稳定”的规律;开采下层煤时导水裂隙带的高度发育受层间距影响较大,层间距大于10 m时导水裂隙带高度较稳定,层间距小于10 m时导水裂隙带高度迅速发育。通过研究为进一步探索水下采煤覆岩的发育规律与保证近距离煤层安全开采提供了科学依据。In a coal mine in Shandong province,the spacing between the upper and lower seam of seam No.3 is relatively close,which belongs to the close-distance coal seams mining.Taking the working face of the coal mine as the engineering background,studies the height development of water-flow fractured zone(WFFZ)in repeated mining by using the methods of empirical formula,field measurement and numerical simulation.The results show that compared with the empirical formula,the FLAC^(3D) numerical simulation has smaller error and stronger applicability when applied to close-distance repeated mining.The development height of the WFFZ shows a"slow-fast-slow-steady"rule with the mining progress.The height of the WFFZ is greatly affected by the spacing between coal seams.When the spacing is greater than 10 m,the height of the WFFZ is stable,and when the spacing is less than10 m,the height of the WFFZ develops rapidly.The research provides a scientific basis for further exploring the development law of overburden and guaranteeing the safe mining of close-distance coal seams.

关 键 词：近距离煤层 导水裂隙带 数值模拟 层间距 

分 类 号：TD745[矿业工程—矿井通风与安全]