青海加吾矿区玛日当沟泥石流启动机理研究

发布时间：2018-06-01 07:36

  本文选题：加吾 + 青藏高原　； 参考：《工程地质学报》2017年02期

【摘要】：加吾金矿地处青藏高原区内柴达木盆地东缘区的青海南山微造山带内,为保障该区矿产资源勘查及开采工作的顺利进行,有效预防矿区内泥石流等突发性地质灾害的发生,本文通过开展矿区泥石流灾害详查工作,尤其是针对矿区重点工作区玛日当沟流域进行了系统的调查,建立对该流域泥石流灾害发育背景的充分认识。在此基础上,依据费祥俊等(2004)关于含有细颗粒水石流启动条件的研究成果以及青海省同德县气象观测资料,对玛日当沟泥石流启动机理作了系统研究。结果表明,加吾矿区所在区域上泥石流发生的临界雨量值为25.7mm;矿区玛日当沟具有暴发泥石流灾害的有利地形、物源及水动力条件;该流域泥石流属典型沟谷型稀性泥石流或水石流,且具有如下规律特征,即满足流体流速Uw≥5.35m·s-1,容重γc≤1.511t·m~(-3)。
[Abstract]:Jiawu gold deposit is located in the Nanshan microorogenic belt in the eastern margin of Qaidam Basin in the Qinghai-Tibet Plateau. In order to ensure the smooth progress of the exploration and exploitation of mineral resources in this area, it can effectively prevent the occurrence of sudden geological disasters such as debris flow in the mining area. Through the detailed investigation of debris flow disasters in mining area, especially the systematic investigation on the Maredanggou basin in key mining area, a full understanding of the development background of debris flow disaster in this basin has been established in this paper. On this basis, based on the results of the research on the starting conditions of water-stone flow containing fine particles and meteorological observation data of Tongde County, Qinghai Province, the starting mechanism of debris flow in Mailidanggou is systematically studied. The results show that the critical rainfall value of debris flow in Jiawu mining area is 25.7mm.Maredonggou has favorable topography, source and hydrodynamic condition for debris flow. The debris flow in this basin is a typical gully type of dilute debris flow or water-rock flow, and has the following characteristics: fluid velocity UW 鈮，

本文编号：1963394