中国大陆金属矿区实测地应力分析及应用

发布时间：2018-04-14 19:03

本文选题：岩石力学 + 井下工程灾害　；参考：《工程科学学报》2017年03期

【摘要】：以迄今为止查阅到的中国大陆金属矿区实测地应力数据为基础,经优化处理后最终采用165组数据,基本覆盖了我国大陆主要金属矿山分布地区.采用回归分析法给出了中国大陆金属矿区测量埋深范围内的地应力场特征,并尝试从地应力的角度对中国大陆金属矿区断层的稳定性进行了讨论.结果显示,中国大陆金属矿区垂直主应力、最大与最小水平主应力总体上随埋深呈线性增加;最大与最小水平主应力之差Δσ随埋深的增加有增大的趋势,但规律性不显著;最大水平主应力与垂直主应力之比K_(h,max)主要集中在1.00~2.50之间,最小水平主应力与垂直主应力之比K_(h,min)主要集中在0.50~1.50之间,平均水平主应力与垂直主应力之比Kh,av主要集中在1.00~2.00之间,随着埋深的增加,3个侧压系数的变化幅度逐渐减小,K_(h,max)趋向于1.83,K_(h,min)趋向于0.80,Kh,av趋向于1.31;最大与最小水平主应力之比与埋深没有显著的关系,主要集中在1.5~2.0之间,近似服从正态分布;断层在埋深小于500 m范围内有滑动的可能,埋深超过500 m时,逆断层有滑动的可能,走滑断层处于相对稳定状态.
[Abstract]:Based on the measured in-situ stress data of metal mining areas in mainland China, 165 sets of data were adopted after optimized treatment, which basically covered the distribution areas of major metal mines in mainland China.In this paper, the characteristics of in-situ stress field in the measurement of buried depth in metal mining area of mainland China are given by means of regression analysis, and the stability of fault in metal mining area in mainland China is discussed from the point of view of in-situ stress.The results show that the vertical principal stress, the maximum and the minimum horizontal principal stress increase linearly with the buried depth, the difference between the maximum and the minimum horizontal principal stress 螖蟽 increases with the increase of the buried depth, but the regularity is not significant.The ratio of maximum horizontal principal stress to vertical principal stress is mainly between 1.00 and 2.50, the ratio of minimum horizontal principal stress to vertical principal stress is mainly between 0.50 and 1.50, and the ratio of average horizontal principal stress to vertical principal stress is mainly between 1.002.00 and 1.002.00.With the increase of buried depth, the variation range of the three lateral pressure coefficients gradually decreases. The ratio of maximum to minimum horizontal principal stress is not significantly related to the depth of burial, and the ratio of maximum to minimum horizontal principal stress is mainly concentrated between 1.5 and 2.0, and the approximate distribution is from normal to normal, and the ratio of maximum to minimum horizontal principal stress tends to be 1.83 / kg / h / min) and the ratio of maximum to minimum horizontal principal stress tends to be 1.31.It is possible for faults to slip in the range of less than 500 m buried depth. When the buried depth is more than 500 m, it is possible for the thrust fault to slip, and the strike-slip fault is in a relatively stable state.
【作者单位】：北京科技大学土木与资源工程学院;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;
【基金】：国家重点基础研究发展计划资助项目(2015CB060200) 国家自然科学基金资助项目(51574014) 中央高校基本科研业务费专项资金资助项目(FRF--TP-16-017A3)
【分类号】：TD31

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