海口磷矿采场现状边坡多工况稳定性的深入研究  

Comprehensive Investigation on Slope Stability under Various Operational Conditions at Haikou Phosphate Mine

作　　者：向立 王嘉弋 徐兴爱 XIANG Li;WANG Jia-yi;XU Xing-ai(Yunnan Phosphate Haikou Co.,Ltd.,Kunming 650000,China)

机构地区：[1]云南磷化集团海口磷业,昆明650000

出　　处：《价值工程》2024年第23期105-107,共3页Value Engineering

摘　　要：边坡稳定性对露天矿山企业有重要影响。通过对海口磷矿地质资料的解译和三维地质模型构建,采用赤平投影法和极限平衡法(Bishop法、Morgenstern-Price法)对矿区边坡稳定性进行分析,提出监测和安全防护措施。研究发现:(1)岩石力学试验结果显示,白云岩、磷块岩、砂岩抗压强度分别为31.98~45.1MPa、39.3~52.2MPa、38.4~61.2MPa,分别为中等~较坚固、较坚固、较中等~较坚固;(2)除三采区岩体质量为差外,其他区域为中等;(3)边坡主要以平面、圆弧、楔形体破坏为主;(4)考虑自然、爆破、地震三种载荷组合,四个采区边坡及南区边坡安全系数均大于规范要求,破坏可能性较小。研究为类似矿山边坡稳定性分析提供参考。Slope stability has an important influence on open-pit mining enterprises.Based on the interpretation of geological data and the construction of three-dimensional geological model of Haikou phosphate mine,the slope stability of mining area is analyzed by the erp projection method and the limit equilibrium method(Bishop method,Morgenstern-Price method),and the monitoring and safety protection measures are put forward.The findings are as follows:(1) The rock mechanics test results show that the compressive strength of dolomite,phosphorite and sandstone is 31.98~45.1MPa,39.3~52.2MPa and 38.4~61.2MPa,respectively,which are medium~relatively strong,relatively strong and moderately~relatively strong.(2) Except for the poor rock mass quality in the three mining areas,the other areas are medium.(3)The slope is mainly damaged by plane,arc and wedge.(4)Considering the combination of natural,blasting and earthquake loads,the safety factor of the slope in the four mining areas and the slope in the southern area is greater than the code requirements,and the possibility of damage is less.The study provides reference for slope stability analysis of similar mines.

关 键 词：边坡稳定性 赤平极射投影 Bishop Morgenstern-Price 安全系数 

分 类 号：TD804[矿业工程—矿山开采]