峰丛地貌下浅埋煤层采动地裂缝形成机理及其发育规律  

The Formation Mechanism and Development Law of Mining-induced Ground Fractures in Shallow Coal Seams Under Peak-cluster Landform

作　　者：陈镇 刘萍[1,2] 朱恒忠 贾毅超 罗畅 CHEN Zhen;LIU Ping;ZHU Hengzhong;JIA Yichao;LUO Chang(School of Mining,Guizhou University,Guiyang 550025,China;Guizhou Provincial Key Laboratory of Comprehensive Utilization of Nonmetallic Mineral Resources,Guizhou University,Guiyang 550025,China;State Key Laboratory Breeding Base for Mine Disaster Prevention and Control,Shandong University of Science and Technology,Qingdao 266590,China)

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]贵州大学、贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025 [3]山东科技大学、矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590

出　　处：《矿业工程研究》2023年第1期1-8,共8页Mineral Engineering Research

基　　金：贵州省科技计划资助项目(黔科合基础[2020]1Z047)。

摘　　要：为了探究贵州地区浅埋煤层采动地裂缝的形成原因和发育规律,基于理论分析和通用离散单元法程序(Universal Distinct Element Code,UDEC)数值模拟研究,提出浅埋煤层地表地裂缝发育的起裂判据;对贵州地区峰丛地貌下矿井进行调研分析,得出3种常见顶板类型,并建立不同顶板下峰丛地貌浅埋煤层模型.研究表明:(1)采动地裂缝发育类型主要为永久性地裂缝和临时性地裂缝,地裂缝发育形态主要以张拉型、张开型、台阶型为主,形成的发育形态与顶板结构类型具有密切联系;(2)地裂缝发育宽度随工作面开采加深呈动态变化;(3)地裂缝发育位置与地表水平位移量存在关联,地表水平位移波峰处通常有地裂缝发育迹象.In order to explore the formation reasons and development rules of mining ground fractures in shallow coal seam in Guizhou area,theoretical analysis and UDEC numerical simulation method are adopted to present the determination formula of surface ground fractures initiation in shallow coal seam.Three kinds of common roof types are obtained through investigation and analysis of mine under peak cluster landform in Guizhou area,and shallow coal seam models of different peak cluster landform under roof are established.Results show that:(1)The development types of mining ground fractures are mainly permanent and temporary.The development forms of ground cracks are mainly tensile type,open type,and step type,which are closely related to the roof structure type.(2)The development width and height of ground fracture change dynamically with the deepening of working face mining,and(3)there is a correlation between the location of ground fractures and the amount of surface horizontal displacement,and there are usually signs of ground fractures at the peak of surface horizontal displacement.

关 键 词：峰丛地貌 采动地裂缝 顶板结构 数值模拟 

分 类 号：TD325[矿业工程—矿井建设]