摘要
为更加准确地进行巷道围岩弹塑性分析,应考虑围岩的损伤特性,在所构建的理论模型中首次引入损伤比例系数,对深部巷道围岩的力学特征进行了详细分析,并通过具体算例探讨了损伤比例系数对围岩塑性区半径和位移的影响规律.研究结果表明:损伤比例系数对巷道围岩力学特征有着明显的影响,随着损伤比例系数的增大,巷道围岩塑性区半径和周边位移均会增大.因此,在进行巷道围岩力学特征分析时,应当适量考虑围岩损伤比例系数的作用,研究成果可为巷道围岩稳定性评估提供理论依据.
In order to carry out the elastoplastic analysis of surrounding rock of roadway more accurately,the damage characteristics of surrounding rock should be considered.For the first time,the damage ratio coefficient is introduced into the theoretical model to analyze the mechanical characteristics of the surrounding rock of deep roadway in detail,and the influence of the damage ratio coefficient on the radius and displacement of the plastic zone of surrounding rock is discussed by a concrete example.The results show that the damage proportional coefficient has obvious influence on the mechanical characteristics of roadway surrounding rock.With the increase of damage proportional coefficient,the radius of plastic zone and the displacement of surrounding rock will increase.Therefore,when analyzing the mechanical characteristics of roadway surrounding rock,the effect of the damage proportional coefficient of surrounding rock should be properly considered.The research results can provide a theoretical basis for the evaluation of roadway surrounding rock stability.
作者
牛心刚
NIU Xingang(State Key Laboratory of the Gas Disaster Detecting Preventing and Emergency Controlling,China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400037,China;Gas Research Branch,China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400037,China;School of Mining and Safety Engineering,AnHui University of Science and Technology,Huainan 232001,China)
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2020年第6期519-523,共5页
Journal of Liaoning Technical University (Natural Science)
基金
“十三五”国家重点研发计划资助项目(2017YFC0804206)
关键词
巷道围岩
损伤比例系数
损伤本构模型
弹塑性分析
塑性区范围
roadway surrounding rock
damage proportional coefficient
damage constitutive model
elastoplastic analysis
plastic range
作者简介
牛心刚(1990-),男,安徽淮北人,博士研究生,助理研究员,主要从事矿山压力与围岩控制、煤岩瓦斯动力灾害防治等方面的研究.
