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露天矿边坡工程是一个随机模型,许多稳定性控制因素、环境因素和作业因素都是不确定的,且服从一定的概率统计分布。根据潜在不稳定边坡体的力学—数学模型,利用各种分布随机变量的抽样序列,模拟给定边坡的形成过程,求得边坡的不稳定概率或可靠性。本文分作两部分:第一部分,论述可靠性分析方法,包括伪随机数的产生、随机变换、不稳定概率和可靠性的确定;第二部分,讨论一个露天石灰石矿重新设计的实例,叙述随机模拟的程序,概录各种边坡设计方案,不同边坡类型的分析结果。
The open pit slope engineering is a stochastic model. Many stability control factors, environmental factors and job factors are uncertain and obey a certain probability and statistical distribution. According to the mechanics - mathematic model of potential unstable slope body, the sampling sequence of random variables is used to simulate the formation of a given slope, and the instability probability or reliability of the slope is obtained. This paper is divided into two parts: The first part discusses reliability analysis methods, including the generation of pseudo-random numbers, stochastic transformations, the determination of unstable probability and reliability. The second part discusses an example of the redesign of an open limestone mine, Simulation program, outline all kinds of slope design, different types of slope analysis results.