摘要
以山东三山岛仓上金矿露天坑尾矿库为研究对象,在高陡岩质边坡CSMR评分基础上,通过岩石力学饱水实验,对岩石力学参数进行弱化,对尾矿库边坡四个典型剖面处边坡在无水、-100m水位、-50m水位和-40m水位下的CSMR动态评分,将487和503剖面动态CSMR评分与矿坑库水位之间的关系进行指数函数拟合,研究其评分和矿坑库水位之间的动态关系。结果表明:边坡RMR值降低,直接致使CSMR值的降低;487和503剖面的CSMR评分相较于483和507对于水位的上升更为敏感,且487和503剖面在水位的上升过程中,CSMR评分率先跌破40分,使边坡处于不稳定状态;库水位在-48.302m时,边坡487和503剖面发生小规模滑动,与CSMR评分结果一致;边坡在当前-47.643m库水位工况下具有一定的安全性,并据此推算边坡的临界库水位在-42.37m^-40.62m之间。通过对露天矿坑库水位临界值的研究,为矿坑边坡的安全稳定性提供有力依据。
This work studied a tailings dam at the pit of a gold mine,which is located in the Sanshandao of Shandong Province.Based on CSMR scores of high steep rocky slopes,a water saturated rock mechanic experiment was made to weak the rock mechanics parameters.Then scores of CSMR dynamic tailings slope of four typical profiles were evaluated in the conditions of without water,-100m,-50m and-40m water levels,respectively.The relationships between dynamic CSMR scores and pit reservoir levels on the 487 and 503 profiles were fitted using a exponent function.The results show that the reduction of the RMR of the slope can directly result in the decrease of CSMR.The CSMR scores of profiles 487 and 503 are more sensitive to the rise of water level than profiles 483 and 507.During the rising process of the water level in the profiles 487 and 503,CSMR scores first went down below 40 points,making the slope unstable.When the water level was at-48.302m,sliding occurred on the profiles 487 and 503,consistent with the CSMR scoring.The slope has a certain degree of security in the condition of-47.643m water level.From this feature,it is inferred that the critical water level of the slope should be between-42.37m and-40.62m.Such a study on critical values of water level in open pits provides a strong basis for assessment of the safety and stability of pit slopes.
作者
张立博
秦哲
付厚利
申科
王强
ZHANG Li-bo;QIN Zhe;FU Hou-li;SHEN Ke;WANG Qiang(Shandong University of Science and Technology,Shandong Key Laboratory of Disaster Prevention and Mitigation,Qingdao,Shandong 266590;School of Civil Engineering and Architecture,Linyi University,Linyi,Shandong 276000)
出处
《地质与勘探》
CAS
CSCD
北大核心
2018年第4期817-823,共7页
Geology and Exploration
关键词
露天矿坑
CSMR动态评价
岩质边坡
尾矿库
仓上金矿
三山岛
山东
open pit
CSMR dynamic evaluation
rock slope
tailings dam
Cangshang gold deposit
Sanshandao
Shandong Province
