东北大学学报（自然科学版）

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (8): 1143-1152.DOI: 10.12068/j.issn.1005-3026.2021.08.012

• 资源与土木工程 • 上一篇    下一篇

深部复杂金矿体充填开采对地表建筑物稳定性影响

张超1,2， 宋卫东1,2， 付建新1,2， 刘建博1,2   

  1. (1. 北京科技大学 土木与资源学院， 北京100083; 2. 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， 北京100083)
  • 修回日期:2020-11-23 接受日期:2020-11-23 发布日期:2021-09-02
  • 通讯作者: 张超
  • 作者简介:张超(1995-)，男，陕西西安人，北京科技大学博士研究生; 宋卫东(1966-)，男，河北廊坊人，北京科技大学教授，博士生导师.
  • 基金资助:
    国家重点研发计划项目(2017YFC0602900); 中央高校基本科研业务费专项资金资助项目(FRF-AT-20-01).

Impact on the Stability of Surface Construction by Filling Method of Deep Complex Gold Ore Body

ZHANG Chao1,2， SONG Wei-dong1,2， FU Jian-xin1,2， LIU Jian-bo1,2   

  1. 1. School of Civil and Resource Engineering， University of Science and Technology Beijing， Beijing 100083，China; 2. Key Laboratory of High-Efficient Mining and Safety of Metal Mines
  • Revised:2020-11-23 Accepted:2020-11-23 Published:2021-09-02
  • Contact: SONG Wei-dong
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摘要： 为研究深部复杂矿体开采对地表建筑物稳定性的影响，借助概率积分法计算安全开采深度;采用3D Mine-Rhinoceros-FLAC3D耦合构建矿区三维模型，进行地表安全性及变形规律研究.结果表明:①采用充填法进行深部矿体开采，地表产生均匀沉降变形，最大主应力随回采步骤增加呈多项式增长趋势，最小主应力呈线性增长趋势，扰动高度沿矿体走向呈正态分布趋势;②矿体的开采使其正上方产生“盆地式变形”，并依据安全性参数进行地表扰动边界圈定;③当下沉变形值小于10mm、变化率大于0.5时和下沉变形值大于10mm而小于20mm、变化率大于1.5时，地表均为整体下沉现象，稳定性不受影响.

关键词: “三下”开采;安全开采深度;3D Mine-Rhinoceros-FLAC3D;地表安全性;地表变化率

Abstract: In order to study the effect of deep complex orebody mining on the stability of surface buildings， the probability integral method was used to calculate the safe mining depth. The 3D Mine-Rhinoceros-FLAC3D coupling method was used to construct a refined 3D model of mining area to study the surface safety and deformation characteristics. The results are as follows: when deep ore body mining is carried out by filling method， uniform settlement deformation occurs on the surface; the maximum principal stress increases polynomially with the increase of mining steps， the minimum principal stress increases linearly， and the disturbance height presents a normal distribution trend along the ore body; the mining of ore body causes ‘basin deformation’ over the ore body， and disturbance boundary is delineated according to surface safety parameters; when the subsidence deformation value is less than 10mm and the change rate is greater than 0.5， or when the subsidence deformation value is greater than 10mm but less than 20mm and the change rate is greater than 1.5， the whole surface subsidence is negligible.

Key words: three-underground mining; safety mining depth; 3D Mine-Rhinoceros-FLAC3D; surface safety; surface change rate

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