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石碌铁矿潜在滑坡冲击能量扰动地下巷道稳定研究
- 作者：
张东炜1，王培涛2，3*，王献纲1，王艺4，陈益朝1，黄浩2，3，付翊林2，3
- 作者单位：
- （1. 海南矿业股份有限公司；2. 北京科技大学资源与安全工程学院； 3. 北京科技大学金属矿山高效开采与安全教育部重点实验室；4. 金诚信矿业管理股份有限公司）
基金项目：
- 海南省科技专项资助项目（ZDYF2024GXJS307）；国家重点研发计划项目（2023YFC2907400，2021YFC2900500）；国家自然科学基金项目（52074020，52574101）
详细信息：
- 作者简介：
- 张东炜（1985—），男，工程师，硕士，从事金属矿山采矿技术及管理工作；E⁃mail：zdw450674870@163. com
- 通讯作者：
- 王培涛（1987—），男，教授，博士，从事矿山岩体力学与工程稳定性等方面的研究工作；E⁃mail：wangpeitao@ustb. edu. cn
- PDF下载
Research on stability of underground roadways disturbed by impact energy of potential landslides in Shilu Iron Mine
- English Author：
Zhang Dongwei1, Wang Peitao2，3, Wang Xiangang1, Wang Yi4, Chen Yichao1, Huang Hao2，3, Fu Yilin2，3
- Unit：
- （1. Hainan Mining Co., Ltd.; 2. School of Resources and Safety Engineering, University of Science and Technology Beijing; 3. Key Laboratory of Ministry of Education for Efficient Mining and Safety of Metal Mines, University of Science and Technology Beijing; 4. JCHX Mining Management Co., Ltd.）
- 摘要
- 在线预览
- 参考文献
摘要:
针对石碌铁矿边坡滑坡及其冲击作用下地下巷道危险带预测问题，通过霍普金森压杆冲击试验，研究矿岩在等冲击气压下的动态力学性质，并结合颗粒流离散元PFC方法，开展了石碌铁矿边坡滑坡研究，分析滑坡冲击细观力学特征及其对地下巷道的影响。研究表明：岩性为均质时，矿岩破坏模式呈“V”字形；岩性为非均质且高径比α=2时，矿岩呈强脆性破坏模式且破坏后试件较完整，冲击长度与试件的破碎程度成正比。边坡滑坡由浅部岩层变形破坏诱导内部岩石颗粒破坏，主要沿着边坡坡顶至坡底方向滑移。滑坡表面光滑，滑移速度主要为 4.5 m/s，边坡最终自然休止角为 20°，滑坡体内部位移为 100～200 m，最大位移达到 310.6 m。-45 m水平巷道有垮塌风险，-60 m和-75 m水平巷道安全。该研究为矿区滑坡冲击对地下巷道稳定性的影响提供有益的参考。
关键词:
露天边坡；滑坡冲击；能量扰动；巷道稳定性；PFC2D软件；SHPB试验
Abstract:
To predict hazardous zones in underground roadways under the action of slope landslides and theirimpacts in Shilu Iron Mine, the dynamic mechanical properties of ore and rock under equivalent impact air pressurewere studied through split Hopkinson pressure bar（SHPB）impact tests. Combined with the particle flow code（PFC）discrete element method, a study on slope landslides at Shilu Iron Mine was conducted, and the meso⁃mechanicalcharacteristics of landslide impact and their influence on underground roadways were analyzed. The research indicatesthat when the rock mass is homogeneous, the failure mode of the ore and rock is V⁃shaped. When the rock mass isheterogeneous, and the height⁃to⁃diameter ratio α=2, the ore and rock exhibit a strong brittle failure mode, and thespecimens remain relatively intact after failure; the impact length is proportional to the degree of specimen fragmentation.Slope landslides are induced by the deformation and failure of shallow rock layers, which cause the failure of internalrock particles, primarily sliding along the direction from the slope crest to the toe. The landslide surface is smooth, witha predominant slip velocity of 4.5 m/s. The final natural angle of repose of the slope is 20°. The internal displacement ofthe landslide mass ranges from 100 m to 200 m, with a maximum displacement reaching 310.6 m. The −45 m level roadwayis at risk of collapse, while the −60 m and −75 m level roadways are safe. This study provides a useful reference forunderstanding the influence of landslide impact on the stability of underground roadways in mining areas.
Keywords:
open⁃pit slope; landslide impact; energy disturbance; roadway stability; PFC2D; SHPB test
