台阶规模边坡滑坡概率的预测方法的研究

发布时间：2018-06-29 04:43

本文选题：台阶规模 + 楔形体搜索　；参考：《内蒙古科技大学》2015年硕士论文

【摘要】：目前，国内外对于滑坡的预测预报研究大都是针对整体高边坡的，而对于露天矿台阶边坡，以及公路、铁路路基边坡等仅有十几米高度的台阶规模边坡研究甚少。此类边坡滑坡时主要是由节理面控制的楔形体滑坡，虽然规模不大，但却是经常发生的现象，它比整体边坡的滑动更经常性的影响生产。本文对滑坡的预测预报主要是基于台阶边坡的楔形体进行研究，通过对白云鄂博铁矿主矿即将开挖形成台阶边坡的区域，进行地质信息采集、节理裂隙等的采样试验工作，在此基础上，运用概率论与统计、理论分析、计算机编程等进行研究。本文主要研究内容有：（1）对现场实测节理面数据进行统计分析，得出其概率分布及特征值。（2）采用蒙特卡洛模拟原理，在[0,1]区间内产生服从各自概率分布的的均匀随机数，在长方体框内模拟出与实测边坡在统计学上大致相同的岩体结构模型，并编制了相应的模拟程序。（3）将台阶边坡的尺寸与等效节理岩体模型相互匹配，形成具有台阶形状的节理面网络模拟图。根据边坡面上各个节理面出露线的交叉及组合情况，利用空间解析几何、块体理论和赤平投影的方法，找出边坡面上可能组合形成的楔形体。（4）依次选取台阶边坡上每一个可能组合成的楔体，抽样产生其节理面的强度数据，，计算该楔体的体积及滑坡概率。对找出的所有的楔形体都进行这样的计算，即可预测出台阶边坡各个部位发生滑坡的概率。本文研究成果是对即将开挖形成的台阶边坡的滑坡概率分布情况进行预测预报，有助于边坡工程师们在设计中及时采取有针对性的预防措施，避免滑坡隐患，降低滑坡后再修改设计造成经济损失。
[Abstract]:At present, most of the researches on landslide prediction and prediction are aimed at the whole high slope, but there is little research on the bench slope of opencast mine and the slope of highway and railway roadbed with a height of only 10 meters. This kind of slope landslide is mainly wedge-shaped landslide controlled by joint surface, although the scale is not large, but it is a frequent phenomenon, it affects the production more frequently than the whole slope slide. In this paper, the prediction and prediction of landslide is mainly based on the wedge-shaped body of the step slope. Through the sampling test work of geological information collection and joint fissures in the area where the main mine of Bayan Obo Iron Mine is about to be excavated to form the step slope, On this basis, the use of probability and statistics, theoretical analysis, computer programming, and so on. The main contents of this paper are as follows: (1) the statistical analysis of the field measured joint surface data is carried out, and the probability distribution and eigenvalue are obtained. (2) the Monte Carlo simulation principle is used to generate uniform random numbers from their respective probability distributions in the [0 ~ 1] region. In the cuboid frame, the rock mass structure model which is statistically similar to the measured slope is simulated, and the corresponding simulation program is worked out. (3) the dimension of the step slope is matched with the equivalent jointed rock mass model. A network simulation diagram of joint surface with step shape is formed. According to the intersection and combination of the exposed lines of each joint on the slope surface, the spatial analytic geometry, block theory and the method of stereographic projection are used. Find out the wedge formed by the possible combination on the slope surface. (4) select each possible combination wedge on the step slope in turn, sample the strength data of the joint surface, calculate the volume of the wedge and the landslide probability. The probability of landslide in every part of step slope can be predicted by calculating all the wedges. The research result of this paper is to predict the landslide probability distribution of the step slope which is about to be excavated, which will help the slope engineers to take timely preventive measures in order to avoid the hidden danger of the landslide. Reduce the landslide and modify the design resulting in economic losses.
【学位授予单位】：内蒙古科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD80

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