摘要
为正确指导首山一矿己15-1712110工作面机巷受回采动压影响下的经济安全支护,利用3DEC离散元数值模拟软件,对工作面机巷在掘进以及回采过程中受到动压影响下的巷道围岩受力以及塑性区分布进行了数值模拟计算,并分析了巷道围岩变形破坏规律。研究结果表明,在巷道挖掘后,巷道围岩的受力状态发生改变,巷道两帮逐步形成应力集中,巷道围岩出现损伤。巷道开始回采后,动压影响开始显现,围岩的变形量和变形速率明显加快,且随工作面回采呈加速趋势。
In order to correctly guide the economic and safe support of the machine lane of Shoushan No.1 Mine′sⅥ15-1712110 working face under the influence of dynamic pressure of back mining numerical simulation software of 3DEC discrete element was used to calculate the force and distribution of plastic zone of the surrounding rock of the working face machine lane under the influence o dynamic pressure in the process of excavation and back mining,and analyze the deformation and damage law of the surrounding rock of the lane.The research results show that after the excavation o the tunnel,the stress state of the tunnel surrounding rock is changed,and the stress concentration is formed gradually on both sides of the tunnel,and the tunnel surrounding rock is damaged.After the roadway began to be retrieved,the influence of dynamic pressure began to appear,and the deformation volume and deformation rate of the surrounding rock were obviously accelerated,and the trend was accelerated with the workface retrieval.
作者
孙海良
张国川
王海涛
锁进杰
SUN Hailiang;ZHANG Guochuan;WANG Haitao;SUO Jinjie(Driving Office,Pingdingshan Tian'an Coal Industy Co.,Ltd.,Pingdingshan 467000,China;Henan Pingbao Coal Co.,Ltd.,Xuchang 461714,China;State Key Laboratory for the Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China)
出处
《煤炭技术》
CAS
北大核心
2022年第11期19-21,共3页
Coal Technology
基金
国家科技重大专项资助项目(2016ZX05045001)。
关键词
软岩巷道
围岩变形
锚网支护
数值模拟
回采动压
soft rock roadway
deformation of surrounding rock
anchor network support
numerical simulation
dynamic pressure
