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岩体是非均质各向异性的地质体,它处于一定的应力状态,由被各种不连续面所分割的岩块组成。在进厅露天矿高大边坡破坏模式的分析时,当无不利的不连续面存在,破坏面可能是切穿岩体的面,这时,为计算边坡稳定性的需要,就要确定岩体的抗剪强度。岩体的抗剪强度是指切穿岩体的破坏面所具有的抗剪强度,它包含破坏面中迁就已有不连续面部分的强度和被剪断岩块部分的强度。由于破坏面的尺度很大,其中所迁就的不连续面和岩块剪断面所占比例难以搞清,以及岩体本身的复杂性很难用符合实际条件的精确试验方法和计算方法确定岩体的抗剪强度。通常采用的原位大型直接剪切试验只能在一定条件下才能进行,而滑坡反算法也只对相应部位局部的岩体强度作一粗略的估计,这两种方法在实际应用中都受到限制。
The rock mass is an anisotropic, anisotropic body, which is in a state of stress and consists of rock fragments that are divided by various discontinuities. In the analysis of the high-slope failure mode of the open-pit mine, the destructive surface may be the surface that cuts through the rock mass when there is no unfavorable discontinuity. At this time, in order to calculate the stability of the slope, the rock must be determined. Body shear strength. The shear strength of rock masses refers to the shear strength of the failure surface that cuts through the rock mass. It contains the strength of the discontinuous surface portion of the fracture surface and the strength of the sheared rock mass. Because of the large scale of the destruction surface, the proportion of discontinuous surfaces and rock shear sections that are accommodated is difficult to ascertain, and the complexity of the rock body itself makes it difficult to determine the rock mass with exact test methods and calculation methods that meet actual conditions. Shear strength. The commonly used in-situ large direct shear test can only be performed under certain conditions, and the landslide reverse algorithm only makes a rough estimate of the local rock mass strength at the corresponding site. Both of these methods are limited in practical applications. .