doi:10.16186/j.cnki.1673-9787.2020050051

Received:2020/05/18

Revised:2020/08/05

Published:2022/01/01

Study on engineering geological zoning and stability evaluation of the open-pit copper mine slope

LI Yong1, LI Changcun1, PANG Shihui2, DU Yonggang3, QIAO Xiaobing4, TAO Zhigang2

1.School of Mining Engineering， North China University of Science and Technology， Tangshan  063200 ， Hebei， China；2.State Key Laboratory of Deep Geomechanics and Underground Engineering， China University ofMining and Technology （ Beijing） ，Beijing  100089 ， China；3.Highway Bureau  of  Dingxi City， Gansu Province， Dingxi  743000 ， Gansu， China；4.Gansu Provincial Highway Aviation Tourism Investment Group Co. Ltd. ， Lanzhou  730030，Gansu，China

Abstract: As the mining depth of mine continues to increase，the stability of the slope in the open pit is increasingly serious． Herein，the open pit of the Tuwu Copper Mine was taken as the engineering geological background． By supplementing and analyzing the existing geological survey data，the mine was divided into four geological zones． Flat polar projection and full wave sonic logging methods were applied for the rock masses in different zones to study the respective slope stability． The results showed that: The engineering geological conditions of the Zone IV were the worst if by means of evaluating the quality of the rock masses，the degree of alteration，the hydrogeological characteristics，and the occurrence status of the rock layers and slopes; The slope stability of the Zone Ⅱ was the worst if comparing the average joint density and development degrees between different zones，by means of drawing pole，equal density，and rose maps with polar flat projection; The same result was also drawn if the full wave sonic logging method was used，i． e． ，obtaining the rock mass integrity coefficient K_v of representative boreholes in different zones by measuring the wave velocity． Combined with the engineering geological zoning，polar projection，and full-wave sonic logging methods，this study revealed that the slope stability in Zone Ⅱ was the worst，and that slope was prone to be instable，and thus needed to be well monitored，protected，and treated.

Key words:slope;engineering geological zoning;polar flat projection;full-wave sonic logging method;stability evaluation

 露天铜矿边坡工程地质分区及稳定性评价研究_李勇.pdf