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本文是井巷喷锚支护作用机理研究光弹性模拟实验的阶段总结。它给出了用环氧树脂塑料做平面模拟实验时井巷围岩裂隙的制作方法;就圆形和椭圆形两种不同断面形状,在单向均布荷载作用下,井巷围岩有裂隙与无裂隙及闭合裂隙与非闭合裂隙对井巷围岩应力分布的影响和喷层部分的应力条纹图;根据弹性力学的迭加原理,还可以把由斜率平衡法求得的过断面中心两对称载面上的应力值进行迭加,以求得在任意载荷比下,井巷围岩两对称载面上的应力值。这些对比实验,为探索喷锚支护作用机理提供了初步的实验数据。
This article is a phase summary of the mechanism of shotcrete and bolt supporting in the study of photoelastic simulation. It gives a method of making cracks in the surrounding rock of tunnel with epoxy resin plastic. In the case of circular and oval two different cross-sectional shapes, And non-fissure and closed fissure and non-closed fissure on the rock surrounding rock stress distribution and spray layer of the stress stripe; according to the principle of superposition of elasticity, can also be obtained by the slope balance method cross-sectional center two The stress values on the symmetrical loading surface are superimposed to obtain the stress value on the two symmetrical loading surfaces of the surrounding rock of the well under any load ratio. These comparative experiments provide preliminary experimental data for exploring the mechanism of spray-anchor support.