锚固岩体强度强化的实验研究

The Study on the Testing of Strengthening the Bolted Rock Body Strength

将锚杆锚固范围岩体作为一个整体 ,即锚固体。运用相似材料模拟试验 ,结合理论分析 ,研究锚固体的变形特性和强度特性 ,从而分析锚杆的支护机理。结果表明 :安设锚杆可以有效提高锚固岩体的峰值强度和残余强度 ,且锚杆对岩体残余强度的强化程度大子对峰值强度的强化程度。并且 ,随着锚杆布置密度的增加 ,锚固体峰值前的E、C、Φ值与峰值后的M、C。

With the rock body in the bolting scope as a whole,through simulation stests of similar materials and theoretical analysis and the study on the deformation and strength of the bolted rock body,the supporting mechanism of the bolts is analyzed.The result shows that the installation of bolts can effectively enhance the peak and residual strength of the bolted rock body and that bolts strengthen the strength of residual of the rock body more than they do the strength of its peak Moreover,with the increase of the density of bolt arrangement, E、C、Φ before the peak value of the rock body and M、C、Φ after the peak value are also increased to different extents.