摘要
针对深部巷道易发生动力失稳问题,基于弹塑性力学理论,建立了巷道围岩三分区模型,推导了非均匀应力场条件下圆形巷道围岩塑性区的边界方程。采用数值模拟方法,定量分析了单轴抗压强度、弹性模量和内摩擦角对围岩应力场、位移场及损伤演化的影响规律。研究结果表明:巷道周边的位移和塑性区范围随着围岩单轴抗压强度和内摩擦角增大而减小,弹性模量增大会导致围岩的弹性应变显著增加,进而增大巷道周边的应力和位移,降低防冲性能。研究结果为巷道支护设计提供理论支撑,对冲击地压防控具有重要意义。
In order to solve the problem of dynamic instability in deep roadways,based on the theory of elastoplastic mechanics,a threezone model of the surrounding rock of the roadway is established,and the boundary equation of the plastic zone of the surrounding rock of the circular roadway under the condition of non-uniform stress field is derived.The numerical simulation method was used to quantitatively analyze the influence of uniaxial compressive strength,elastic modulus and internal friction angle on the stress field,displacement field and damage evolution of the surrounding rock.The results show that the displacement and plastic zone range around the roadway decrease with the increase of uniaxial compressive strength and internal friction angle of the surrounding rock.The increase of elastic modulus will lead to a significant increase in the elastic strain of the surrounding rock,which will increase the stress and displacement around the roadway and reduce the anti-scouring performance.The research results provide theoretical support for the design of roadway support,which is of great significance for the prevention and control of rock burst.
作者
刘永军
Liu Yongjun(Gongwusu Coal Industry Co.,Ltd.,Wuhai Energy,CHN Energy,Inner Mongolia,016000)
出处
《当代化工研究》
2025年第8期30-32,共3页
Modern Chemical Research
关键词
非均匀应力场
圆形巷道
围岩塑性区
单轴抗压强度
弹性模量
inhomogeneous stress field
circular roadway
plastic zone of surrounding rock
uniaxial compressive strength
elastic modulus
