摘要
为解决埋深浅、基岩层薄、围岩易风化等问题对切眼支护的影响,采用数值模拟和理论分析方法,通过正交试验对锚杆、锚索支护参数进行优化。结果表明,随着锚杆间排距的减小,单根锚杆间形成的压应力区进一步叠加;随着锚杆长度的增加单体锚杆的有效压应力范围先增大后减小,巷道围岩变形量近似呈对数规律减小并趋于稳定;采用结构补偿原理确定了锚索支护参数。围岩监测结果表明,切眼变形得到了控制,达到了预期效果。
To solve the influence of shallow-buried depth,thin bedrock,and easy weathering of surrounding rock on open-off cut support,using numerical simulation and theoretical analysis method,we use orthogonal test to optimize bolt support parameters.The results show that the compressive stress zone formed by a bolt further overlays with the decrease of row spacing; effective compressive stress range first increases and then decreases with the decrease of bolt length; roadway surrounding rock deformation reduces approximately logarithmic law gradually and tends to be stable; the principle of compensation is determined using a structured reinforcement anchor parameters.Scene surrounding rock deformation monitoring results show that the deformation of surrounding rock has been well controlled,the desired effect is achieved.
出处
《煤矿安全》
CAS
北大核心
2016年第8期201-204,共4页
Safety in Coal Mines
关键词
浅埋深
薄基岩
切眼支护
数值模拟
参数优化
shallow-buried depth
thin bedrock
open-off cut support
numerical simulation
parameters optimization