摘要
在研究矿山排土场滑坡泥石流的危害时,模型试验能够较为准确地预测泥石流危害的影响范围。以四川盐源平川铁矿排土场为原型,应用相似试验原理建立该排土场某一滑坡体的试验模型,进行滑坡泥石流试验。试验中泥石流在距离排土场滑坡体下游3.6 m处停止堆积运动,泥深最大值为4 cm(断面1),最小值在为0.5 cm(断面3),但是泥深的变化呈现出一定的波动性,各断面的泥深并非到达最大值后就持续减小。根据相似试验的预测,平川铁矿排土场下游的部分重要设施会受到滑坡泥石流的破坏,确定了危害影响范围,评估了排土场下游设施可能的受灾程度。
The paper is to introduce our analysis of the dumping landslide debris flow regularity based on the similar tests. For this purpose, we have built a test model of Daopingzi waste dump land- slide flow in Pingehuan iron ore mining site by way of similarity simu- lation experiments. The purpose of the design .and implementation of the experiments is to simulate the harmful consequences of the dump- ing landslide debris flow by means of a simulated test model. Based on the test results, the paper is aimed at analyzing the variation regu- larity of the accumulation length and depth after the debris is blown out through the downstream complex terrain in hoping to predict the destructive situation in case the actual landslide debris flow comes. Taking into account the size of testing site area and reducing the mod- eling workload, we have set the geometric similarity ratio as 1 ： 400. According to the principle of mechanical similarity, we have gained the test material by using the artificially proportional mineral materi- als. The test results have thus shown that, the accumulation process of the debris flow tends to stop at the waste dumping downstream and the deposit length is about 3.6 m. At the same time, the maximal mud depth should be 4 cm in section 1 and the minimal mud is 0.5 cm deep in secti6n 3, but the mud depth variation tends to present a certain degree of volatility, which should not be as deep as the maxi- mal limit, thus attempting to decline continuously at each section, which is caused by the topography of the region the debris flows through. Based on the similar testing results, it can be predicted that the part of important facilities, including the 2 560 m level tunnel at the entry and 2 410 m level at the return air-ventilation cave mouth, which should be subject to the damaging effects of the landslide debris flow in Daopingzi the dumping downstream. Thus, the predicted re- sults help to determine the scope of the hazard impact and assess the affecting degree for the downstream dumping facilities.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2013年第5期195-198,共4页
Journal of Safety and Environment
关键词
安全工程
相似试验
排土场
滑坡
泥石流
危害范围
safety engineering
similar tests
dump
landslide
de-bris flow
hazard range
