层状岩层条件下巷道顶板破坏分析与模拟研究  

Theoretical analysis and numerical simulation of roadway roof failure in layered strata

作　　者：张守宝[1] 马煜君 王磊[1] 罗绪轩 朱俊杰 Zhang Shoubao;Ma Yujun;Wang Lei;Luo Xuxuan;Zhu Junjie(School of Energy and Mining Engineering,China University of Mining and Technology,Beijing 100083,China)

机构地区：[1]中国矿业大学(北京)能源与矿业学院,北京100083

出　　处：《煤炭与化工》2020年第5期9-12,16,共5页Coal and Chemical Industry

基　　金：国家自然科学基金重点项目(51234005);中央高校基本科研业务费项目(2009QZ10);中国矿业大学(北京)大学生创新训练计划资助。

摘　　要：煤矿顶板稳定性机理是巷道控制领域关注的重点。层状顶板作为煤矿巷道的主要顶板类型,其发生破坏的过程难以明确。本文将层状巷道顶板从梁结构假设出发得出其破坏分为弯拉破坏和弯剪破坏两类,得出了弯拉破坏和弯剪破坏受力、变形的发生区域和断裂的准侧,并进一步分析了巷道岩梁在受到顶板恒定荷载和可变荷载时的破坏方式,最后通过数值模拟得出了层状顶板破坏过程中各个阶段顶板内部单元受力的形式,与理论分析基本一致。It is the key point that the mechanism of coal mine roof stability is in the field of roadway control.As the main roof type of coal mine roadway,the failure process of layered roof is always difficult to determine.In this paper,based on the assumption of beam structure,the failure of layered roadway roof was divided into two types,bending-tension failure and bending-shear failure.The area of stress and deformation and the fracture criterion were obtained.Furthermore,the failure modes of roadway rock beam under constant load and variable load were analyzed.Finally,the failure process of layered roof was obtained by numerical simulation in each stage,the stress form of roof internal element was basically consistent with the theoretical analysis.

关 键 词：层状顶板 弯拉破坏 弯剪破坏 受力分析 

分 类 号：TD353[矿业工程—矿井建设]