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断裂构造和结构面对露天高陡边坡破坏模式影响研究
- 作者：
王发刚|林洪彬|刘正宇|余升红|肖祖荣|邹平
- 作者单位：
- （1.紫金（长沙）工程技术有限公司；2.紫金矿业集团股份有限公司；3.低品位难处理黄金资源综合利用国家重点实验室；4.湖南紫金锂业有限公司）
基金项目：
- “十四五”国家重点研发计划项目（2022YFC2903902）
详细信息：
- 作者简介：
- 王发刚（1997—），男，工程师，硕士，研究方向为矿山岩土工程灾害防控；E-mail：wang_fagang@zijinmining.com
- 通讯作者：
- 刘正宇（1973—），男，教授级高级工程师，研究方向为矿山工程地质与安全；E-mail：liu_zhengyu@zijinmining.com
- PDF下载
Study on the influence of fault structures and structural planes on failure modes of high and steep open-pit slopes
- English Author：
Wang Xiaoge, Wu Bing, Li Binchuan, Liu Yafang, Chen Jianshe, Meng Weifen, Han Qing
- Unit：
- (1. School of Metallurgy, Northeastern University; 2. Sanmenxia Polytechnic; 3. Sanmenxia Nonferrous Metals Technology Development Center)
- 摘要
- 在线预览
- 参考文献
摘要:
为研究断裂构造和结构面对露天高陡边坡破坏模式的影响，以湖南某锂多金属矿为工程背景，采用现场调查和理论分析等手段进行调查与分析。矿区断裂构造以近SN向断裂为主干构造，其间发育NE向断裂、近EW向断裂、NW向断裂、弧形断裂及不同的节理裂隙，构成矿区的基本构造格架；通过现场调查测得岩体结构面产状，统计分析得到不同岩体的优势结构面：粗中粒斑状黑云母花岗岩3组、中细粒斑状黑云母花岗岩2组和云英岩2组；采用赤平投影法分析断裂构造和结构面对露天高陡边坡破坏模式影响。结果表明：F2断裂构造在Ⅳ区可能发生平面破坏；粗中粒斑状黑云母花岗岩第三组优势结构面在Ⅲ区可能发生平面破坏；Ⅲ、Ⅳ区粗中粒斑状黑云母花岗岩第二组、第三组优势结构面组合，与坡面相切后可能发生楔体破坏。
关键词:
断裂构造；结构面；露天矿；高陡边坡；破坏模式；岩芯编录
Abstract:
To investigate the influence of fault structures and structural planes on the failure modes of high and steep open-pit slopes,with a lithium polymetallic mine in Hunan Province as an engineering background,the study conducted field surveys and theoretical analyses. The mine area is characterized by a near-SN main fault structure,along with NE fault zones,near-EW fault,NW faults,arc-shaped faults,and various joint fissures forming the basic structural framework of the mining site. Field investigations revealed the occurrences of rock structural planes,and statistical analyses identified dominant structural planes:3 sets in coarse to medium-grained porphyritic biotite granite,2 sets in medium to fine-grained porphyritic biotite granite,and 2 sets in greisen. Stereographic projection analysis was employed to assess the impact of fault structures and structural planes on high and steep open-pit slope failure modes. Results indicate that the F2 fault structure may cause planar failure in Zone Ⅳ；only the third set of dominant structural planes in coarse to medium-grained porphyritic biotite granite may result in planar failure in Zone Ⅲ；and wedge failure may occur in Zones Ⅲ and Ⅳ due to combinations of the second and third sets of dominant structural planes intersecting the slope face.
Keywords:
fault structure；structural plane；open-pit mine；high and steep slope；failure mode；core logging
