| 李江,吕果,姜珊珊.考虑深基坑施工的邻近矿山稳定性研究[J].矿产勘查,2025,16(9):2172-2177 |
| 考虑深基坑施工的邻近矿山稳定性研究 |
| Stability study of adjacent mines considering deep foundation pit construction |
| 投稿时间：2023-07-07 |
| DOI：10.20008/j.kckc.202509011 |
| 中文关键词: 深基坑施工 邻近矿山 稳定性 数值模拟 |
| 英文关键词: deep foundation pit construction adjacent mines stability numerical simulation |
| 基金项目:本文受北京综建科技项目(2017DJ3030)资助。 |
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| 中文摘要: |
| 深基坑施工造成的应力扰动对邻近矿山稳定性产生影响，单纯依据现场监测会导致矿山稳定性分析结果不精准，为此，提出考虑深基坑施工的邻近矿山稳定性研究。本文采用 MIDAS仿真技术构建影响分析模型，对模型进行上、下和侧面的约束限制。设定仿真模拟基本假定条件，模拟深基坑开挖及支护过程，结合邻近矿山周围土体的应力分布规律，构建周围土体渗流-应力耦合模型。以模拟分析邻近矿山初应力，并通过周围土体拱形压力分析，直观反映出深基坑开挖初始邻近矿山周围土体应力的变化情况。通过研究深基坑施工对矿山 x、y方向位移变化的云图，直观反映深基坑开挖后邻近矿山周围土体坍塌风险。应用结果表明:所研究方法与实际测量结果误差较小，可以为类似研究提供借鉴。 |
| 英文摘要: |
| The stress disturbance caused by deep foundation pit construction has an impact on the stability ofadjacent mines. Simply based on on-site monitoring will lead to inaccurate results of mine stability analysis. There-fore, the study on the stability of adjacent mines considering deep foundation pit construction is proposed. TheMIDAS simulation technology is used to construct the influence analysis model, and the model is restricted by theupper, lower and side constraints. The basic assumptions of simulation are set to simulate the excavation and sup-port process of deep foundation pit. Combined with the stress distribution law of soil around the adjacent mine, theseepage-stress coupling model of surrounding soil is constructed. The initial stress of the adjacent mine is simu-lated and analyzed, and the arch pressure of the surrounding soil is analyzed to intuitively reflect the change of thestress of the surrounding soil around the initial excavation of the deep foundation pit. By studying the cloud map ofthe displacement changes in the x and y directions of the mine caused by the construction of the deep foundation pit, the risk of soil collapse around the adjacent mine after the excavation of the deep foundation pit is directly re-flected. The results show that the error between the research method and the actual measurement result is small,which can provide reference for similar research. |
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