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本文从锚杆改善被锚固岩体的力学性质出发,提出了锚杆等效支护阻力的计算办法。文中分析了国内外已发表的锚固岩体的力学性质试验的若干数据,认为被锚固岩体的峰值强度和残余强度均较未锚固岩体有了较大幅度的提高,其值视锚杆直径、长度及间距,尤其是锚杆密度或配锚率有关。在较硬岩体中约提高1～3倍,较软岩体中约1～4倍。根据试验资料,文中给出了强度提高系数与锚杆支护参数的参考值。
In this paper, starting from the improvement of mechanical properties of anchored rock mass, the paper puts forward the calculation method of equivalent supporting resistance of rock bolt. In this paper, some published data on the mechanical properties of anchored rock mass are analyzed. The results show that the peak strength and residual strength of the anchored rock mass are much higher than those of the un-anchored rock mass, , Length and spacing, especially bolt density or anchorage rate. In the harder rock about 1 to 3 times higher than the soft rock about 1 to 4 times. According to the experimental data, the reference values of the strength improvement coefficient and bolt support parameters are given in this paper.