东北大学学报(自然科学版) ›› 2025, Vol. 46 ›› Issue (4): 97-105.DOI: 10.12068/j.issn.1005-3026.2025.20230272
孙东东1,2, 杨天鸿1,2, 刘飞跃1,3, 刘洋1,2
收稿日期:
2023-09-21
出版日期:
2025-04-15
发布日期:
2025-07-01
作者简介:
孙东东(1991—),男,辽宁海城人,东北大学博士研究生基金资助:
Dong-dong SUN1,2, Tian-hong YANG1,2, Fei-yue LIU1,3, Yang LIU1,2
Received:
2023-09-21
Online:
2025-04-15
Published:
2025-07-01
摘要:
在进行边坡岩体质量评价和稳定性分析时,通常将岩体简化为均质材料,而天然岩体实际上具有非均质的特征.针对该问题,提出了一种考虑非均质性的岩体质量精细化表征及力学参数建模方法.以乌拉根铅锌矿为例,详细阐述了岩体力学参数精细化建模的流程.基于所建立的精细化力学参数模型,分别采用均匀和非均匀两种岩体力学参数对南帮进行稳定性分析,结果表明,采用非均匀力学参数进行计算可以更准确地反映露天边坡稳定性的真实情况.本研究所建立的精细化块体模型能够反映露天边坡中的薄弱及不稳定区域,可为边坡岩体质量评价、稳定性分析及支护施工设计等提供科学有效的解决途径.
中图分类号:
孙东东, 杨天鸿, 刘飞跃, 刘洋. 露天矿山岩体质量精细化表征及边坡稳定性分析[J]. 东北大学学报(自然科学版), 2025, 46(4): 97-105.
Dong-dong SUN, Tian-hong YANG, Fei-yue LIU, Yang LIU. Detailed Characterization of Rock Mass Quality and Slope Stability Analysis for Open-Pit Mines[J]. Journal of Northeastern University(Natural Science), 2025, 46(4): 97-105.
岩性 | A1 | A3 | A4 | A5 | B |
---|---|---|---|---|---|
含砾砂岩 | 2 | 15 | 17 | 7 | -5 |
中风化砂岩 | 4 | 15 | 18 | 4 | -5 |
含矿砂岩 | 2 | 15 | 20 | 4 | -5 |
微风化砂岩 | 7 | 15 | 20 | 10 | -5 |
微风化泥岩 | 4 | 15 | 20 | 10 | -10 |
灰岩 | 7 | 10 | 18 | 10 | -5 |
中风化石膏 | 7 | 15 | 18 | 10 | -5 |
砾岩 | 4 | 15 | 20 | 7 | -10 |
长石砂岩 | 2 | 15 | 18 | 7 | -10 |
表1 RMR分级系统评价因子(不含RQD值) (excluding RQD)
Table 1 RMR grading system evaluation factor
岩性 | A1 | A3 | A4 | A5 | B |
---|---|---|---|---|---|
含砾砂岩 | 2 | 15 | 17 | 7 | -5 |
中风化砂岩 | 4 | 15 | 18 | 4 | -5 |
含矿砂岩 | 2 | 15 | 20 | 4 | -5 |
微风化砂岩 | 7 | 15 | 20 | 10 | -5 |
微风化泥岩 | 4 | 15 | 20 | 10 | -10 |
灰岩 | 7 | 10 | 18 | 10 | -5 |
中风化石膏 | 7 | 15 | 18 | 10 | -5 |
砾岩 | 4 | 15 | 20 | 7 | -10 |
长石砂岩 | 2 | 15 | 18 | 7 | -10 |
岩性 | mi |
---|---|
含砾砂岩 | 20 |
中风化砂岩 | 17 |
含矿砂岩 | 19 |
微风化砂岩 | 20 |
微风化泥岩 | 8 |
灰岩 | 9 |
中风化石膏 | 14 |
砾岩 | 12 |
长石砂岩 | 13 |
表2 H-B指标mi 取值
Table 2 H-B index values of mi𝑖
岩性 | mi |
---|---|
含砾砂岩 | 20 |
中风化砂岩 | 17 |
含矿砂岩 | 19 |
微风化砂岩 | 20 |
微风化泥岩 | 8 |
灰岩 | 9 |
中风化石膏 | 14 |
砾岩 | 12 |
长石砂岩 | 13 |
岩性 | 黏聚力 | 内摩擦角 | 容重 |
---|---|---|---|
kPa | (°) | kN·m-3 | |
微风化泥岩 | 674 | 32.00 | 25.69 |
长石砂岩 | 355 | 31.43 | 23.26 |
含砾砂岩 | 304 | 31.28 | 25.09 |
砾岩 | 433 | 37.91 | 26.74 |
中风化石膏 | 477 | 36.50 | 29.39 |
表3 力学参数取值
Table 3 Mechanical parameter values
岩性 | 黏聚力 | 内摩擦角 | 容重 |
---|---|---|---|
kPa | (°) | kN·m-3 | |
微风化泥岩 | 674 | 32.00 | 25.69 |
长石砂岩 | 355 | 31.43 | 23.26 |
含砾砂岩 | 304 | 31.28 | 25.09 |
砾岩 | 433 | 37.91 | 26.74 |
中风化石膏 | 477 | 36.50 | 29.39 |
边坡工程安全等级 | 自重+地下水+爆破振动力 |
---|---|
Ⅰ | 1.23~1.18 |
Ⅱ | 1.18~1.13 |
Ⅲ | 1.13~1.08 |
表4 总体边坡设计安全系数
Table 4 Design safety factors for slope
边坡工程安全等级 | 自重+地下水+爆破振动力 |
---|---|
Ⅰ | 1.23~1.18 |
Ⅱ | 1.18~1.13 |
Ⅲ | 1.13~1.08 |
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